growing in gutters

[straush]

i have bought some 2m sqaure gutters to use in my greenhouse. 

i placed these over shelves two nex tto each other -  in total i have 3 heights i.e. 6 gutters each side of the green house

what i have found is tat the radish ad some salad stuff (pak choi etc)  bolted very quickly - can anyone tell me if that is beause the gutters are too shallow or if there is another reason

thanks
hendrik

[straush]

[GrannieAnnie]

Too much heat will cause some cool weather lovers to bolt.

[goodlife]

Yep...radish and pak choi  are better either early spring or autumn/winter cropping and this weather we've been having ..well mid summer temps will make them bolt early..and being in GH as well.. even warmer ::)
You would do better with ordinary salad leaves this time of the year..but multipurpose will dry out far too quickly and shrink in gutters...mix in some top-soil/ John Innes 2/ loam...heavier stuff and your gutter crops will do better.. ;)