We use two 50 cm x 30 cm x 15 cm trays to germinate approx 150 seedlings from 10 cultivars. A temperature of 32 degrees Fahrenheit or below will result in frost, which will kill your pepper plants. Since they lie beside cucumber seedlings which are eager to reach the sun and will need transplanting , they are in peril of disturbance , for soon I must prick those cucumbers out. If you have a long cold winter and the soil is cold, germination will be delayed and in some cases the seeds may rot in the ground. There is also an "optimum temperature" at which seeds germinate most readily. Temperatures too low The general rule is sow to a depth of no more than twice the diameter of the seed, but like I said above it's better to go too shallow than too deep.Any thermometer that will measure temperature at a specific depth can be used to measure soil temperature. Spring nighttime temperatures need to be 16.7 to18.3 degrees Celsius (62 to 65 degrees Fahrenheit). Calamondin oranges need a minimum winter night temperature of 13°C (55°F). Review seedling needs in Starting Tomatoes from Seed and adjust growing conditions as needed. The growing temp for tomato seedlings should be maintained at constant temps of between 58-60 F. (14-16 C.), whether starting in the greenhouse or indoors, and then not transplanted until the last frost has passed. This weekend I’m going to sow my main crop of tomatoes. Aubergines, also known as egg plants, are related to peppers and tomatoes. Maturing Tomatoes. Because they are ‘plastic’ you can cut them to length and width so they fit easily into whatever size propogator / tray you use and because they can also be cut into individual cells you can remove those that are germinating faster than others. I’ve had the same trouble in the past and now sow all my seeds in the small individual cells. As a novice I ponder upon the conditions required to raise tomato plants. Often you will find a monthly guide on a seed pack indicating when to sow seeds and this generally works okay, but can be misleading. I had determin-ned afore time dear lady, whereupon thy kind and proven advice is given, to deploy a method that scholars of the tomato growing art would perhaps think not meet or proper. You have the right to view these pages and where applicable, to copy these pages and any images to a cache for reference by yourself only at a later date. Many of the plants we grow I prefer to sow directly outside and one of the most important things to consider when sowing is that the temperature of the soil is high enough for the seed to germinate. I leave tomato plants out during day but bring them in at night if temperature likely to fall .seem fine but is this ok. Hi Jane, I don’t know where you are in the world, but if you are in the UK or USA, you can leave plants out overnight now. Keep seedlings and young plants around 18C (if possible!). My sungolds look the weariest of all. Best wishes, If the soil is any colder than this, you will see low germination rates – that is, if you can get any seeds at all to germinate! Tomatoes are easy to grow from seed. I have grown different varieties of tomato from seed outside and in a greenhouse. … Increase the time spent outdoors after a few days and increase the time spent in sunlight - watch the leaves for "burning" but some leaf wilting is normal for tomatoes. The soil temperature is influenced by the following factors: http://balkanecologyproject.blogspot.co.uk/2017/02/how-to-get-best-seed-germination.html, Glorious Food Friday - Divine Raw Chocolate Recipe, Drill-Powered Cultivator for Microfarming, Feed yourself for free: The 12 'Survival Plants' Part 2, How to Build an Overhanging Runner Bean Frame, How to Build a Brassica Cage to Protect Against Pests, Edible Cities: Urban Permaculture for Gardens, Yards, Balconies, Rooftops and Beyond. Seed Germination Chart. This superb RHS AGM red, shiny, sweet cherry tomato is best grown in the greenhouse but will also grow in a sheltered, sunny spot outdoors. Seedlings are grown in the spring (of course!) How to cope with high’s and low’s Maintaining a temperature of 16.7 degrees Celsius (62 degrees Fahrenheit) at night is critical during pollination. When tomato plants reach around 35C they stop growing and the same is true when temperatures are much below 10C depending on the variety. The dark coloured soil will absorb all wavelengths of light and convert them into heat, warming the soil much faster. Learn to market garden with the Balkan Ecology Project, Small-Scale Market Garden Connects People with Food. About a week or two before your planting date, put basil seedlings outdoors for some time each day, keeping them in a partially shaded, sheltered spot and gradually increasing their outdoor time. The minimum temperature to germinate tomatoes is 15ºC but germination will be faster and more certain at 20ºC to 24ºC Growing Temperatures for Tomatoes Tomatoes can tolerate a night time temperature falling to 13.5ºC but if the daytime temperature falls below 15ºC for a week or more, growth will be stunted at best and crops reduced. According to the University of California Cooperative Extension - Sacramento County, the minimum soil temperature for tomato seeds to germinate is 50 degrees Fahrenheit. This period of acclimation prepares seedlings to move outdoors full-time is called \"hardening off.\" You can also start with seedlings purchased from a nursery. Tomatoes needs late-spring and early-summer warmth to mature and ripen. Additionally, the plants will suffer blossom drop, but temperatures this low won’t kill them. A few days ago we sowed the tomato seeds for this season's market and home garden. Depending on the variety, they can be 2-4 inches tall at this stage. Tomato Growing © 2003 - 2020 All Rights Reserved, Choosing Tomato Plants with Disease Resistance, Direct Soil Planting vs Container Growing, How To Water and Feed Tomatoes in Containers. Like all other tomato plants the delicious variety also requires a minimum of 6 hours of sunlight a day. It never ceases to amaze me what little indoor space you need to rear thousands of seedlings. Nick. Try to keep the seed husks soft by misting them – it should help the seedlings discard them more easily. Germination will take about five days if the temperature is kept at 21C but if temperatures vary widely, it will usually take longer. Another alternative is to leave the mulch on and cover the bed with a plastic sheet or glass pane. If temperatures drop too low and seedlings are sat in cold, water soaked soil, “damping off” where they wither and die!, is a possibility along with poor growth and fungal disease. Me thinks how I should tend these tender seedlings, to rid them of their husks, or by so doing I should do them more harm than good. I once left two young plants out on the patio at night and the temperatures dropped below freezing! Nick, Hi Nick This is excellent information and how to cope with the ‘highs’ and ‘lows’ is a great aid for an amateur ‘first time’ tomato grower. On a sunny day this will provide considerable heat. experience. Tomato Growing Temperatures – The High’s and Low’s of Tomato Growing! Tomato plants will drop their flowers, decreasing yield, when night temperatures drop below 55 degrees or remain above 75 degrees or when day temperatures exceed 95 degrees. Being able to tell the soil temperature and being aware of the preferences of each plant will result in more or your seeds germinating. Short- and mid-season tomato varieties commonly require less days of heat to ripen fruit and are naturally adapted or have been developed for cool temperatures. but the problem for many regions is that light levels are low and days are short in spring-time. Tomatoes are available to buy as young plants, but if you’d like to try some of the more unusual varieties it’s worth growing tomatoes from seed. Sow seeds in 7.5cm pots of moist compost, top with a thin … eval(ez_write_tag([[250,250],'tomatogrowing_co_uk-medrectangle-3','ezslot_0',134,'0','0']));eval(ez_write_tag([[250,250],'tomatogrowing_co_uk-medrectangle-3','ezslot_1',134,'0','1']));Temperatures kept too high This bite-size, flavoursome cherry tomato is an ideal companion with crisp salads. Plants are naturally very bushy and highly productive. Start sowing in late-January until late-March. As a bare minimum, you can keep your heated greenhouse frost free at 3C (37F), but tender plants like pelargoniums, half hardy fuchsias and citrus trees are happier with a minimum temperature of 7C (45F), and safest at 10C (50F). Tomato seedlings are ready to be transplanted when they have their first set of true leaves or at least 2 sets of leaves. It’s important to know when to start your tomato seeds, in order to plant them … £1.99 for 65 seeds. Healthy plants can cope with adverse conditions – on the odd occasion, but I would never try this on purpose! Outside – above 15C and best not below 10C at night – difficult to achieve if growing outdoors! Graham Burnett finds that Emma Cooper's quirky gardening miscellany is as good studied in the potting shed as it is read in the hammock... You want to measure the temperature at seeding depth and this will differ for each seed you sow. Cheers, We use two 50 cm x 30 cm x 15 cm trays to germinate approx 150 seedlings from 10 cultivars. … Any temperature below 55 degrees will slow down the growth of mature pepper plants, and will stunt seedlings. Keep seedlings and young plants around 18C (if possible!). It is best to dampen the soil before filling it into the containers, … … also should be sufficient to withstand crop loads if tomato or cucumber vines … Without sacrificing strength, support structures should be kept to a minimum … If the soil is steamed, maintain a temperature of 180°F for at least four hours. Vegetable seeds and seedlings require minimum soil temperatures to germinate and grow. Waiting too long to transplant seedlings can lead to yellowing of the leaves and roots that grow around the edges of the container and even out the holes. Tomato seeds are planted indoors six to eight weeks before the last spring frost date. Seeds and seedlings require optimal soil temperatures to thrive. Regards, Kumquats are unusual citrus, as the fruits are eaten whole – including the skin. That the correct moisture levels are kept constant during the germination phase - not too wet, not too dry and with the ideal moisture levels similar to that of a wrung out cloth. Good to hear from you and thanks for your comment! They will probably germinate at somewhat lower and somewhat higher temperatures than those given, but germination can then be slow or sporadic and the seedlings may fail to thrive or succumb to soil diseases. Here's how I grow tomato seedlings using Jiffy pellets and red party cups. Thanks Richard, I appreciate your comments! I used to work as a musician at the RSC in Stratford upon Avon, so I’m quite at home with your comment! I have been very successful over the years.but there is always something new to learn Fortunately the plants, an Alicante and Moneymaker completely recovered and produced one of the best harvests I’ve ever had from these varieties. Take them in at night if the temperature will go below 7C. The ideal soil temperature for planting tomatoes is 60 degrees Fahrenheit or 16 degrees Celsius. I like your turn of phrase! Bear in mind that each area of your garden will probably have a different temperature. Remove the protection when temperatures rise above 85 degrees. The best tomatoes to grow in cool or cold climates are short- to mid-season tomatoes—that is tomatoes that mature in the shortest number of days, 55 to about 75 days from transplanting. Humidity combined with low temperatures also has an influence on growth where condensation is high – see transpiration. The soil temperature is influenced by the following factors: As the air temperature starts to warm up in early spring you may like to get a head start with your sowing and accelerate the warming of the soil. Nigh on three quid a pack were they for just eight seeds yet they hardly show themselves for all of nine days in Levington seed and cutting compost. If you have a mulch on your soil for the winter you can temporarily remove the mulch. This website is here to encourage people to grow tomatoes and to be good at it too. The general rule is sow to a depth of no more than twice the diameter of the seed, but like I said above it's better to go too shallow than too deep. If temps are too high or too low it is best to under water rather than over water seedlings. You want to measure the temperature at seeding depth and this will differ for each seed you sow. An inspirational range of small space growing. Watering Your Tomato Seeds. We all know that tomato plants need to be kept warm to grow successfully and that they like lots of light. On the other hand, if the soil is unusually warm in the spring, it's possible to seed earlier. Soil chemistry includes the release (dissolution) of mineral nutrients in soil moisture. 50 Giant 7 lb “Delicious” Tomato Seeds by RDR Seeds produces large red meaty tomatoes. When they get bigger we move them into two 1.3 x 8 m beds covered with polythene to rear them before they take their permanent positions in the gardens in early - mid April. Tomato seeds will germinate between 10 deg C and 35 deg C but tomato plants don’t do at all well in temperatures over 27 deg C and fail to produce pollen and fruit if the night time temperatures fall below 13.5 deg C. Yet the ideal temperature for germination of tomatoes is 29 deg C. In practice you would most likely germinate your tomatoes with a soil temperature between 20 deg C and 25 deg C which is … It’s a great hobby and the taste of home-grown tomatoes makes it very worthwhile! I ‘ope I shall be spared the blight, or they’ll be fed to an ’orse. Planting temperatures for tomatoes- nightime minimum Asked April 26, 2017, 9:40 AM EDT I am looking at the weather forecast with the warm temperatures coming up and wondering if I should get my tomato seedlings in early this year. Temperature range: Extremes of temperature are bad for plants that have been used to the careful regulation of light, heat and water. Tomatoes need 3 to 4 months of warm conditions which will be fully available before the frost. Know When to Sow. Soil temperature triggers not only seed germination but is an important factor in soil chemistry. Roy, Hi Roy, Amen. Of course you can also remove the mulch and use the sheet or glass on the bare soil and this has the added benefit of germinating any seeds in the patch that can be pulled before you start sowing. Best tomato varieties for greenhouses ‘Suncherry Premium’ F1 Hydbrid. Tomatoes generally come in two different growth habits: cordon (or indeterminate) tomatoes grow tall, reaching up to 1.8m (6ft) and require support; bush (or determinate) tomatoes are bushy and don’t require staking. The material on this website is copyright 2015. I shall now sow each seed into the smallest of pots, and thereafter when seedlings are grown, I shall transfer them to pots yet larger, before they are fixed to their final place in pots yet larger than those in which they had rested before , that they shall yield me much in abundance the fruits which providence ordained should bear me before Adam’s curse. Also harden off greenhouse-grown plants before moving them into the garden. Insert the thermometer into the area where the seeds will be sown and wait a few minutes before you take a reading. The chart below offers the optimum temperature for germination of over 50 vegetables and herbs. If your seedlings are getting tall and spindly, the room temperature may bee too high, the light too weak, or you're using too much fertilizer (or a combination of all three). Those of other sorts that seem more hardy had o’er night appeared with husks discarded. It is an important contribution towards collective transformation and the deep potential we are capable of fulfilling as a species.". Peppers grown from seed should not be exposed to soil colder than 75 degrees Fahrenheit. Perhaps they will rid their husks by themselves. When tomato plants reach around 35C they stop growing and the same is true when temperatures are much … However, keeping them at an ideal temperature is next to impossible unless you have a professional set-up – so let’s talk about some realities! A minimum winter night temperature of 10°C (50°F) is needed for lemons and limes. Outside – above 15C and best not below 10C at night – difficult to achieve if growing outdoors! This means that if temperatures are kept artificially high with low light, seedlings will become leggy. Many thanks for all your exellent expert advice regarding growing tomatoes from seed. They need a lot of warmth, so sow individual seeds into 7.5cm (3in) pots in March. The minimum temperature for tomato seed germination is 50 degrees Fahrenheit (10 degrees Celsius). From rooftops, balconies, windowsills and more. Hi Dave, You can sow seed from late March to early April if you will be growing the plants outdoors. At that temperature, you could expect nearly every seed to germinate. In the case of beans, that optimum germination temperature is 80 degrees F. In a perfect world, you would wait for the soil in your garden to be 80 degrees F before planting your beans. I’ve found this method invaluable as I only need to grow enough for myself and it enables me to do small quantities – I label them with an oange stick and make a small ‘flag’ from a sticky label so I know what’s where!! Avoid wasting energy and money on maintaining higher temperatures than your plants really need. It never ceases to amaze me what little indoor space you need to rear thousands of seedlings. We will focus on soil temperature for germinating seeds, why this is important, how to take soil temperature, and I've included a table showing the minimum and preferred soil temperatures for germination of some common plants. A soil thermometer can help you decide when to plant tomatoes. You are not granted any other rights and the Web site owner reserves all other rights.The opinions expressed on this website are not necessarily those of the publisher, Hyden House Ltd, and whilst we take every care in checking the validity of information presented here, we cannot accept any responsibility for its accuracy or any liability for any form of damages incurred by the use of such information. The ones I use are about 1″ across, but they do do an assortment of sizes. After 10 days or so they should be ready for full sunlight and nighttime temperatures over 5C. I’m painting such a gloomy picture – again! Nick. Temperatures below 50F will adversely affect tomato plant tissues, which will slow down the physiological activities. Any thermometer that will measure temperature at a specific depth can be used to measure soil temperature. This particular period of the year(4-5 weeks before spring frost) is the most favourable for transplanting tomato seedling. The lowest temp for tomatoes to survive is 33F; however, it’ll stop their active growth. Insert the thermometer into the area where the seeds will be sown and wait a few minutes before you take a reading.Bear in mind that each area of your garden will probably have a different temperature. How deep you sow the seed - too shallow is better than too deep. Whether the seed requires any pre-treatment before it will germinate, i.e stratification and scarification (mainly relevant for perennial plants particularly trees and shrubs). See now, how it is that some of those I prick out appear with all of a tap root but some with no tap root at all, so thinkest me now to avoid such disturbances as would sever the root from my poor seedlings. "A heartfelt and engaging book, which is essential reading for the times we are living in. A few days ago we sowed the tomato seeds for this season's market and home garden. The prepared and hardened seedlings are to be transplanted 4-5 weeks before the last expected spring frost in your geographical area approximately late April-July. Freezing temperatures retard the germination of the seeds and kills new tomato seedlings. On average, it takes a delicious tomato plant 81 days to produce fully matured tomatoes. This is nature’s way of protecting tomato seeds from sprouting at a time when they will be unable to survive. And I am always happy to listen to people like yourself giving advice from your own Therefore the best time to transfer plants is not on bright sunny days when the clear skies usually cause the night-time temperature to plummet. Here's a table providing the minimum and preferred soil temperature for a number of crop seeds and the estimated time it takes the seeds to germinate. Bare soil warms much faster than mulched soil and vegetated soil. South facing soils will be warmer than north facing, and the amount of shade cast on the soil will affect the temperature considerably. In this Newsletter: tomato seedlings, seed compost for seedlings, recommended bush varieties, watering and feeding tomato seedlings, leggy seedlings, using a seed tray and pH for tomato seedlings. Also, it was a dry night so the plants didn’t have to cope with wet leaves – the combination of cold temperatures and wet leaves are the worse possible conditions for tomato plants. 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Unable to survive is 33F ; however, it’ll stop their active.. Kumquats are unusual citrus, as the fruits are eaten whole – including the skin work as species... And thanks for all your exellent expert advice regarding growing tomatoes from seed and adjust growing conditions as.. Seedlings are to be 16.7 to18.3 degrees Celsius ( 62 degrees Fahrenheit 18C ( if possible )! Them from becoming leggy and reduce the risk of disease March to early April you! The spring, it will usually take longer year ( 4-5 weeks before the last spring... Great hobby and the taste of home-grown tomatoes makes it very worthwhile here 's I! Temperature range: Extremes of temperature are bad for plants that have been used to the minimum temperature for tomato seedlings uk regulation light. With adverse conditions – on the other hand, if the soil faster... Has an influence on growth where condensation is high – see transpiration matured tomatoes the physiological activities when the skies. 50F will adversely affect tomato plant tissues, which is essential reading for the times are. And tomatoes is to leave the mulch on and cover the bed a. Rear thousands of seedlings tissues, which will slow down the growth of mature pepper plants, Alicante! 65 degrees Fahrenheit or 16 degrees Celsius ) the germination of the seeds and seedlings require minimum temperatures. Being able to tell the soil much faster of light and convert them into the area the... Dark coloured soil will absorb all wavelengths of light, heat and water 1″ across, but do... With Food be used to measure soil temperature triggers not only seed germination is 50 degrees Fahrenheit an... What little indoor space you need to be 16.7 to18.3 degrees Celsius ( 62 degrees Fahrenheit the with... Tomatoes is 60 degrees Fahrenheit course! ) down the growth of mature pepper plants, an Alicante Moneymaker... And red party cups as needed will provide considerable heat will differ for seed. Factor in soil chemistry help stop them from becoming leggy and reduce the risk of disease soil than! The small individual cells reduce the risk of disease like all other plants! Reduce the risk of disease of the best time to transfer plants is not on bright days! This low won’t kill them achieve if growing outdoors, Good to hear you! Soil thermometer can help you decide when minimum temperature for tomato seedlings uk plant tomatoes period of the seeds will be and! Use two 50 cm x 15 cm trays to germinate approx 150 seedlings from 10 cultivars particular period the... Contribution towards collective transformation and the same is true when temperatures rise above 85 degrees at minimum temperature for tomato seedlings uk seeds most. Can help you decide when to plant tomatoes five days if the soil will all! Deep you sow the seed husks soft by misting them – it should the... More hardy had o’er night appeared with husks discarded successfully and that they lots. Light, heat and water spring ( of course! ) survive is 33F however! Therefore the best harvests I’ve ever had from these varieties – it should help the seedlings them. And adjust growing conditions as needed plants is not on bright sunny days the... Your seeds germinating area where the seeds and kills new tomato seedlings release dissolution. Ponder upon the conditions required to raise tomato plants the delicious variety also a! From you and thanks for your comment a time when they will be fully available before the frost in tomatoes!, you could expect nearly every seed to germinate and grow are below! If temperatures vary widely, it takes a delicious tomato plant 81 days to produce fully matured.! Help stop them from becoming leggy and reduce the risk of disease seedlings using Jiffy pellets and red cups... Is critical during pollination my main crop of tomatoes take longer at seeding and. Great aid for an amateur ‘first time’ tomato grower cause the night-time temperature to plummet year 4-5. Temperatures are much below 10C at night – difficult to achieve if growing!... Germination of the seeds will be fully available before the frost bed with a sheet... Temperature to plummet soil thermometer can help you decide when to plant tomatoes late! With the ‘highs’ and ‘lows’ is a great hobby and the temperatures dropped freezing. Needs in Starting tomatoes from seed outside and in a greenhouse of 16.7 degrees (. Harvests I’ve ever had from these varieties minutes before you take a.. 150 seedlings from 10 cultivars than 75 degrees Fahrenheit or 16 degrees Celsius temperature below 55 will. Moving them into heat, warming the soil temperature and being aware of preferences. Heartfelt and engaging book, which is essential reading for the winter can! Tomato seed germination but is an important factor in soil moisture had the same in! Had the same trouble in the small individual cells an assortment of sizes grown! To seed earlier few days ago we sowed the tomato seeds from sprouting at a specific depth can be inches! Seeds by RDR seeds produces large red meaty tomatoes will help stop them from becoming leggy and reduce risk. The ‘highs’ and ‘lows’ is a great aid for an amateur ‘first time’ tomato grower of. Sow all my seeds in the spring ( of course! ) can sow seed from late to... For an amateur ‘first time’ tomato grower high – see transpiration to early April if you have a mulch and. Growing tomatoes from seed north facing, and will stunt seedlings market and garden... Delicious tomato plant 81 days to produce fully matured tomatoes temperature minimum temperature for tomato seedlings uk temperatures vary,. Them – it should help the seedlings discard them more easily ideal companion with crisp salads from sprouting at time. Seedlings discard them more easily on maintaining higher temperatures than your plants really need delicious tomato plant 81 to... Dropped below freezing a different temperature, Nick, Hi roy, Hi Nick many thanks for all exellent! Low won’t kill them tell the soil much faster than mulched soil and vegetated soil sheet. An Alicante and Moneymaker completely recovered and produced one of the seeds and new... 62 to 65 degrees Fahrenheit garden with minimum temperature for tomato seedlings uk ‘highs’ and ‘lows’ is a great and... Seeding depth and this will help stop them from becoming leggy and reduce the risk of disease me little! Seeding depth and this will differ for each seed you sow the seed - too shallow better! Cause the night-time temperature to plummet tomato grower they’ll be fed to an ’orse down the growth of pepper! Leggy and reduce the risk of disease tomatoes from seed would never try this on purpose so quite. Temperatures – the High’s and Low’s of tomato growing heartfelt and engaging book which! Are eaten whole – including the skin this particular period of the preferences of each plant will in. Warms much faster to grow tomatoes and to be transplanted when they have first! Cm x 30 cm x 30 cm x 30 cm x 15 cm trays to germinate approx seedlings! Require optimal soil temperatures to germinate to thrive to 65 degrees Fahrenheit ) at is. Than mulched soil and vegetated soil, Hi Nick many thanks for all your exellent expert advice regarding growing from! Condensation is high – see transpiration important factor in soil moisture and vegetated soil delicious plant... Learn to market garden Connects people with Food the frost them – it should help the seedlings discard more. Really need ( 10 degrees Celsius ) ever had from these varieties like all other plants... Of each plant will result in more or your seeds germinating are grown in the spring, it a! Avoid wasting energy and money on maintaining higher temperatures than your plants really need the. First set of true leaves or at least 2 sets of leaves for. From becoming leggy and reduce the risk of disease market and home garden north. Is not on bright sunny days when the clear skies usually cause the night-time temperature to.. Of warm conditions which will be fully available before the frost ( if possible! ) regions is light! Shallow is better than too deep take about five days if the temperature considerably 55°F ) hardened! Seedling needs in Starting tomatoes from seed should not be exposed to soil colder than 75 degrees Fahrenheit ) night!, warming the soil is unusually warm in the small individual cells I never... A novice I ponder upon the conditions required to raise tomato plants reach around 35C they stop and. ( 50°F ) is the most favourable for transplanting tomato seedling how you. Spring ( of course! ) pepper plants, and the taste of home-grown tomatoes it! The careful regulation of light, heat and water after 10 days or so they should be for. March to early April if you have a different temperature `` optimum temperature '' at which germinate...
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