What is the Perfect Time to sow Tomatoes Seeds? After 5 weeks when the expected last frost date is past transplant your tomato seedlings inside your unheated greenhouse.įor more details on growing greenhouse tomatoes, you can check this extensive Greenhouse Tomato Guide that covers everything.Ĭheck out this video from Youtube channel Project Diaries and see how he is growing tomatoes from seeds.After your tomato seeds have successfully germinated give them about 18 hours of artificial light per day. During the first few days of germination turn off the Grow Light.
#LOWEST TEMP FOR TOMATO SEEDLINGS INSTALL#
Install this Grow Light 12-24 inches above your tomato seedlings. You cannot only use it for growing seedlings but you can also use it for growing tomatoes indoors. Use the well known BESTVA LED Grow Light ( See Price). Install a grow light above your tomato seed tray.I myself use iPower Seedling Heat Mat ( see price) and it works fine. The ideal temperature for germinating tomatoes is 70-80 ☏ (21-27 ☌) If your indoor temperature below 64 ☏ I will strongly recommend using a heat mat to heat the seedling trays from the bottom, It will greatly improve the germination speed of your tomato seeds.Water the compost to make it damp (Don’t saturate it) and put the lid on.Place your tomato seeds on the surface of the compost and cover the seeds with 0.5 – 1 cm of compost.(I have good experience with Espoma Seed Starterbut you can use any seed starter mix). You can fill any multipurpose compost or Seed starting mix. Fill the seedling trays with compost and press it slightly to flatten the compost.I recommend using LOVEDAY Seed Starter Trays ( See Price) because the dome keeps the humidity high and helps in fast germination. Buy a seedling tray (plug tray) for your tomatoes.In my region, the last expected frost ends in the first week of April and I sow my tomato seeds indoors in late February. When the frost date is over you can then transplant your tomato seedlings inside your unheated greenhouse. I would recommend sowing your tomato seeds indoors 5-6 weeks before the expected frost date according to your geographical zone.
You Know! tomatoes seeds take 5-6 weeks to become strong seedlings that are ready for transplanting.
This is the earliest you can go with an unheated greenhouse.
let me explain how.Īs we have discussed above, You can sow tomato seeds inside your greenhouse after the last expected frost dates. I know it sounds too much, but believe me, by doing so you will be 5 weeks ahead of your planting schedule and it will extend your growing season by 5 weeks. You should Sow your Tomato seeds Indoors! Then, where should you sow your tomato seeds ? You can only sow tomatoes in your unheated greenhouse after the last expected frost date is passed in your geographical zone. So, You cannot sow tomatoes inside your unheated greenhouse when its frost outside. You should never let your greenhouse temperature go below 10☌ for a long period of time especially when your tomato plants are young. Furthermore, a temperature of 4☌(39 ☏) or less, will seriously damage your tomato plants. However, during late winter when it’s freezing outside the temperature inside the greenhouse will be just above freezing especially when its cloudy during the days.īut, Tomato seeds require temperature higher than 10☌ (50☏) for germination and proper seedling growth.
We already know that an unheated greenhouse is great for extending the growing season. 11.4 CRUCIAL FOR SUCCESS Where should you SOW your Tomato seeds?
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