I don't think that kind of temperature at night should be any problem so go ahead

Thanks, will do. Is there any slug or snail risk to hourse chestnut and hazel saplings?

Depends on what kind of slug you got, I guess. At least those terrible "Spanish slugs" have not eaten my horse chestnut or hazel, even if they love my onions

British slugs is what I have - they come in various sizes from very tiny to bloody huge - the same applies to the snails in my neck of the woods.

If you have those huge Roman snails you can eat them instead

Ahh, if only! :)

That's promising news for my 6 inch tall hazel sapling. :)

I have a bunch of hazel seedlings, some in the porch and some planted last year. The slugs here, Canada, leave them alone. I'll be likely having some hazels come up outside shortly, as I planted beaked hazel nuts, so I'll know better if tender new seedlings are tasty to slugs. What kinds of hazels do other folks have?

That's good to know, thanks.