Thank you for your reply. I do have a thermometer, I have now put in tunnel. We have had some warm weather for last week , soil is warm, and during the day It is more than warm enough. I have potatoes, strawberries, and lettuce coming on really well. I was hoping to gain some time, and space in my kitchen, which is north facing so not ideal have to turn about 120 plants every day. A lot are also flowers for my hanging baskets I like to pot up early so when they go out end of may they are lush. These be alright? Geraniums, lobelia etc