Canterbury Bells

[AKMild]

I bought some Canterbury Bell plugs last summer and put them in 3 inch pots in my unheated greenhouse and basically forgot about them (apart from occasionally watering them). They have formed rosettes of leaves and I understand that I should have planted them in their final growing place last autumn, but I forgot.

Any advice as to when I should get them planted out and whether they will flower?

[zebo]

I had these in my last garden and they grew like crazy. I'd put them out once the chance of frost's past but then just enjoy and forget them, they spread very well and can easily be split.

[Chipchopper]

Well worth a try AK.
Hopefully you have a biennial variety which should flower in its 2nd year.
Good luck.

[Old_Jim]

They are fully hardy and could be planted out at any time. However, they will sulk if you put them straight into cold wet ground. Put the pots outside, bringing them into the greenhouse at night if a frost is forecast, and plant them out in about 3 weeks' time.