Needs lots of sun, so if you have it under the canopy of a tree, you'll get fewer flowers anyway, and assuming the tree is alive, the plant will be competing for water with it too. Also, pruning should be carried out after flowering, roughly mid July, which usually consists of thinning out a bit and cutting back stems which have flowered. This plant gets 30 feet high by about 12 feet wide or more eventually.

thanks Blossom,
pretty new to gardening but trying!
the climber is winding up a really tall silver birch tree & gets the sunshine, do you think its best if i replant elsewhere in the garden, to make to most of its potential growth like you mentioned, as currently its just 1 long climber with small leaves coming off not bushy at all
thanks,

sorry meant thanks bamboo!! :)

I think it would be better to get it out of there and resite it somewhere else - but be careful, Birch trees do not like root disturbance. It'll be better for the tree in the long run, though - waste of a very attractive tree trunk, trying to grow something up it for a start, and the tree will do better without the competition, as will the Jasmine.

great advice thanks very much,