Can these stay in a greenhouse?

[carly]

So I will be growing brocilli and cauliflower and Brussels.
Now I was planning on keeping them in the greenhouse in big troughs but I am not sure if they would withstand high temperatures? Would it be best to put these in big pots eventually from small pots and move them outside once the weather is nice?
Will onions and radish do ok staying in the greenhouse perminant. I just ask because if I plant directly into the big trough that will be the direct sowing place so will not be planning on moving from there.

[bario1]

Hi Carly. I would say no to keeping large brassicas in the greenhouse, they tend to bolt if they get too hot.
Radishes and onions may fare a bit better, but you'll have to be very diligent about watering.

[Thelma Sanders]

Brassicas don't like being warm, they must go outside asap - after this winter blast, obviously.
I think radish would just get woody quickly in the warm, so outside for them as well.
Not sure what onions would do - but as they grow well in hot countries I assume they would be alright inside.

[muck lover]

Evict the brassicas. Plant luscious strawberries tomatoes cucumbers French beans melons..........

[Aberdeenplotter]

Onions will be absolutely fine. Yes, move your brassicas out once weather is better. Radishes will be absolutely fine outside so no need to waste valuable bench space with them

[burnie]

I do one early sowing of radish this time of year in the greenhouse for an early crop, but as has been said brassicas don't like hot and of course radish are also brassicas.