I've grown it just below the waterfall but in a pot. I have used Irish moss inbetween the wet rock crevices and it grew like crazy. Didn't overwinter though but that's just my climate as sometimes it overwinters sometimes not. Also have used parrot feather and creeping jenny in between rocks in waterfall--creeping jenny did better than the parrots feather. I think the parrots feather prefers more water than what it got in those areas.

Hi again. While searching for good vege filter or filtration plants I found a site that talked about forget-me-not in waterfalls. Site said excellant plant for growing between rocks--just plant bare root as long as plant gets some water from waterfall the roots will trap waste and grow. Hope this helps. Patti

THank you Patti! I tried searching that question on google, but didn't find the answer, thank you so much!

Yes, it lives in the waterfall, we have it planted bare root in the waterfalls. We also have them planted in the ground at the edge of the pond...The stuff grows like a weed, very easy to split and spread around. it's also a perrenial.