Water hyacinths turning yellow

[Tesla_HV]

This is my first year with an outdoor pond. Is this because we are approaching fall/winter? I thought that water hyacinths were perennial. Incidentally, out of the six or so plants that I have, I only got one bloom all season.

 

[plantbrain]

They are if they are kept warm..........you might lack NO3 otherwise.........

regards,
tom Barr

 

[coupedefleur]

WH's are a tropical plant, and can't take cold weather. They're also very heavy feeders.

What a lot of people do (assuming you don't' want to pollute the pond just to make the WHs happy) is to put some dried cow or chicken manure (find it at a garden store) or worm casings into a bucket or tub. Add water, and put some of the WH's in for a few days.

I have never managed to keep WH alive indoors over the winter.