In article , Bob Hobden
writes

I might add that I feel it's a little early to plant cucurbits (Marrows,
pumpkins, cucumbers etc) out into the garden yet, even down here I don't
plant them out until June arrives. They don't like these cold nights and
even a slight frost will see them off, I lost most of mine a few years back
to a Grass Frost on the 9th June.

Yes I agree, much the same applies to French beans too. We have put some
earlier sown tenderish plants out this week, but we are ready with a
protective cover of horticultural fleece if frost is forecasted.
--
Alan & Joan Gould - North Lincs.