I am building a cold frame for late autumn and will probably move up to building a small green house.
Of course you need sun for a green house, and it has been an exceedingly gloomy Spring and early Summer so far.
I have already chosen a spot that is sunny after the trees drop their leaves....but receives sufficient shade in the summer.
;-)
We could use some of that gloom here in N. TX. It is sunny, with not a cloud in the sky, and projected to reach 102 today.