"Kay Easton" wrote in message
I can think of an immediate problem with pollination. Sweet corn is wind
pollinated - it relies on the wind to transfer pollen from the male

I've never even thought of growing it in a greenhouse but I don't see why
not apart from space (height). I doubt if pollination would be a problem,
you'd just need to go round tapping the stems - probably daily for a few
days when the male flowers were ready to release pollen.
For outdoor planting on N Wales coast I will sow in the greenhouse about 2-3
weeks from now. For S Scotland choose early maturing varieties.

Rod