Five typical mistakes when growing tomatoes - and how you can do it better. Around mid-March is a good time to grow tomatoes indoors; you can also start growing tomatoes in the greenhouse at the end of February.
A good growing temperature is 20 to 24 degrees Celsius. If you move the young plants from a warm house to a cool one within a short time, you risk them dying due to the shock. If the substrate contains too many nutrients, it is counterproductive for the seedlings - they grow too quickly and do not form a wide network.