I have a number of things started from seed, grown in my basement under a combination of MH and HPS lights. They were all doing supurb, so last weekend I moved them to an unheated Greenhouse that is built with polycarbinate siding an roofing. It's double panel poly. The plants receive sunlight filtered through that poly. My plan was to let them acclimate in the GH for two weeks, then transplant them.
In the GH, thye are getting sunlight, but it's filtered by the polycarb. The location does not get full noonday sun, just moring and late afternoon.
Will these plants need to be hardened off to the "real" sun, or is the GH experience enough? Last year I skipped the GH step and moved directly to hardening off in the shade and for limited time. It worked pretty good, but I am now using the GH as a secondary step for plants before real outdoors.
This worked well for onions, shallots and leeks. They all were born under the lights, moved to the GH, then put out in the sun. They did not get any hardening time between GH and full sun, but it was late March, early April and the sun angle and intensity were less than now.
So, tomatoes, peppers, vines? GH or let em out to play?