Posted: 29/05/2015 at 15:17
It's only when ivy has reached the top of it's support and produced its arborial form that it will produce flowers and berries, and this takes several years - however, it is possible to take cuttings from the arborial form of ivy and grow them as shrubs which flower and fruit. I've seen this done where it has been used as an attractive low hedge.
It is an offence in the UK (Wildlife & Countryside Act) to introduce Himalayan Balsam into the wild - as the seeds catapault high, far and wide, if you grow it in your garden it is virtually impossible to prevent it spreading. I know, I lived next door to someone who had one plant in his garden. Within two years his garden and mine were full of it, within five years it had spread into every garden along our side of the street. It was a total pain in the neck pulling the seedlings up year after year.
We moved house.