Allotments 4 All

I potted last years runners into small plastic pots and they have overwintered in a cold greenhouse, they are small, maybe 3 or 4 leaves, but look quite healthy. My question is, when can I plant them out in my allotment with the rest of the strawbs?

It would be now if it wasn't for all this snow covering the ground.

I'm leaving my similar ones in the greenhouse until they get too big for their pots.

thank you! Will leave them a bit longer!