[PennyLS]

I have a  6m polytunnel , with raised beds,  in South Wales. When can I put house grown seedlings into the poly tunnel? Or is too much like asking how long is a piece of string?

[JayG]

Do you have a thermometer (ideally a max/min type?)

Usual rule of thumb is that for the tender crops (toms, cukes etc.) you need the temperature to not drop lower than 10C at any point - for me that's usually early May, but no two years have been the same in recent years.   

[PennyLS]

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

[Plot 1 Problems]

In my polytunnel I have staging shelves to keep my seedlings, the tender ones under a plastic lid. They wont go out into the tunnel beds until I see regular night time temps of 10c.

[JayG]

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

It's the likes of toms, chillies and cukes which can be set back or even killed by low temperatures - yours should be fine as long as the temperature stays above freezing in the GH (if your forecast is anything like mine, night-time temperatures look pretty reasonable for the next week, which will help them acclimatise.)

[PennyLS]

that sounds like a great idea thanks