i had a freind that was in a similar position P) and found it was good to put them in a greenhouse or at least in heavy cover of the wind sothey can get acustomed to the outdoors (indoor plants have thiner stalks so must be gradualy exposed to wind so they do not snap or colapse but instead adapt and thichen stems.)

you dont hapen to live in brighton do you? cuz my m8 could help u out if u want.

if its bagseed then chill and try a few out in difrent places (asuming you have more than 15 or so)

once acustomed to the outdoors you can just give them compost and water and ignore them till....... its HARVEST TIME!!!