It was actually a 30 gallon see thru plastic
garbage bag...
I did put the plant into the bag...
but left it open to the green on top..
and just wanted the plastic bag to "act" like
a pot/container... something to hold a bit of moisture so the entire rootball didn't dry out completely...
And watered sparenly thru out the winter...
I put them in probably around late Sept/Oct.. and didn't water them again probably until Jan.. to be honest... then once a month, if I get down there.. and then come around March I start watering a bit more... and then gradually open the basement doors in April, to start letting a bit of sunshine in, *I don't move them to it, just enough to let more new light in.. then gradually move them towards the light.. and then into the steps and a little bit more sun..
They are spindley/pale green and they green up as I move them slowly towards the light...
I have seen where they've done the garbage bag thing.... even inside the floors of green house's. but I haven't ventured that route yet..