I jammed one piece into a pot in my veggie filter and the thing went nuts. I gave
one chunk to my MIL and planted it on the edge of their small private lake and it
went nuts. I had one chunk split an industrial strength 18 inch pot in 2 summers.
They like to be crowded, they dont seem to need more than fish waste strength fert.
but when repotting start em off with long release osmocote since after 1 season you
wont get anything down into the pots. why not try a series of pots all the same size
with about same size chunk of iris and experimentally determine what is the best
type, amount and concentration for growing in your neck of the woods. Ingrid

~ jan JJsPond.us wrote:
As a hobbyist, I divide my iris in the spring after they've bloomed and
feed them a fertilizer spike made for Tomatoes. Otherwise I let the fish
poo fertilize them. If no fish, and no concerns about water quality,
Osmocote would be fine, imo. ~ jan )


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