[SusieB]

I have broad beans in modules, about 6" high, in the cold greenhouse.  When can I plant them out?  Frost is predicted over the weekend.

Thanks.

[Aidy]

Depends on the variety, I grow Sutton, its frost hardy so mine will be going in this weekend, some are not and need to go in a little later in March/ April.
What variety are they?

[victoria park]

Apart from the variety, if it were me, I would leave them until Monday, when the worst is past, but then put them out very soon, as no plant likes being 6 inches tall in a module. For the first few days of outside life, I always think a bit of enviromesh protection doesn't go amiss for most plants. A sort of roundabout way of extra hardening off.
 
I always sow aquadulce claudia first week in November to get around those issues.

[Salmo]

Do not pamper them or they will grow weak and leggy. Put them outside to harden off. Only bring them in if hard frost is likely. Plant them out as soon as the weather looks like Spring. Plant them deep so they can support themselves.

[SusieB]

Thank you everyone.  They are crimson-flowered broad beans.  Sound a bit prissy to me, I will start toughening them up and not pamper them.

[juvenal]

My Aquadulce broad beans at 5" high went out onto my allotment two days ago.