Phyllis and Jim Hurley wrote:
Zookeeper,

What is the water depth of your pickerel weed?
Ours grows, but does not seem to thrive in about 1" of water.

Our pickerel weed is submerged anywhere from at water level to 4-6
inches under water. It also grows with just its roots in the water,
without the crown submerged. The first year we were here (pond had been
built 2 years b4 we moved in), I was surprised to see these little
arrow-shaped green leaves emerging from the duckweed and azolla. When I
pulled the pickerel weed up from where they had been submerged, they had
2-3 foot stems and since they had been submerged with the pots on their
sides, the leaves were growing at a 90 degree angle from the pots. I
just cut all those off, and set the pots upright.

How much sun does your pickerel get? Although that doesn't seem to
matter to ours. (I just recently read that purple pickerel weed is
considered invasive here in Oregon, and given how well ours grows, I can
see why.)
--
Kathy B