Water hyacinth

[moby]

My water hyacinths have gone mad this year, I've just cleaned out a good hundred from my pond and they've helped keep the water clear this season. I only get a handful, but this has been their most prolific season to date. I'll overwinter some in the greenhouse again ready for 2017 as I've done for the past 5 years or so.
I was wondering, has anyone in the UK got them to flower in an outdoor or indoor setting? Do they have to be a certain size or is it the higher temps that would trigger them to bloom? I might try some in my greenhouse as well next year just as an experiment.

 

[moby]

Sorry about the double post, my iPad locked up and things went wrong...can anyone delete one of these please?

 

[addy1]

Sorry about the double post, my iPad locked up and things went wrong...can anyone delete one of these please?

gone and fixed

 

[sissy]

I keep mine in the basement over winter but only to not have to buy them each year

 

[Faebinder]

I keep mine in the basement over winter but only to not have to buy them each year

Are you putting them under LEDs?

 

[sissy]

yep and have the lights on a timer so they only come on at night when my electric rates are cheaper .There are windows so they get light during the day

 

[addy1]

They don't like my pond, never grow well. I don't bother with them, even though they are pretty.