Topic: cosmos question

[Mrs Ava]

I have a tray of cosmos germinated in the greenhouse and they are looking strong.  Are they hardy?  Can they be planted out yet or should I pot them on and wait another month?

[Larkspur]

Hang on till the end of May and harden them off prior to planting them out. They are on the hardy side of tender and will self seed if given the chance but I wouldn't risk planting greenhouse raised ones yet.