Nice to see someone else with them.. The neighbour had a mature wisteria next door, I took seeds 3 years ago and been growing them ever since. My ones were grown in a small seedling tray on the window sill. They were upgraded to bigger pots afterwards then I simply danced them in and out of the house, 1 warm day outside, inside at night, out, in, out out, in, out out, in, out out out... etc. Adjusting to the weather but obviously if the timing is now that its winter and they've never been outside, in my climate, I would have kept them inside till Spring. No point risking anything, unnecessary. Then start the dance in Spring.
My biggest one in the ground for a year. The ground really accellerated things.
DSC_2537 by
Conor Dashwood, on Flickr
June 2019
DSC_0572 by
Conor Dashwood, on Flickr
I plan to get them all in the ground, I've not got many pics of them at the moment, they are not interesting lol.