Hi, it's called clematis sieboldii, it's probably a foot high, so not an immature plant. White petals with a lovely deep purple centre. Whilst asking, should I plant it in the back garden now - or wait - if the latter, when should I plant it out? The blurb which came with the plant didn't really give any growing instructions. Cheers, Chox.
Personally I'd put it out now so it can sit and settle in its spot ready for spring. Don't be concerned if the leaves go brown and fall off, they are in the main deciduous.
Many thanks for all your help and advice. The planting out will have to wait until next week - during which time we can decide the best place to plant it. I am sure it will be okay in its pot for another few days. Thanks again everyone. Enjoy the rest of Sunday.