Troubleshooting
Blue Pickerelweed problems — and how to fix them
Blue Pickerelweed (Pontederia azurea) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Rhizome rot in cold waterlogged soil
In climates below zone 8, cold, stagnant water in winter can rot the rhizome. In marginal zones, lift and overwinter the rhizome in a frost-free location in moist soil or a bucket of water indoors, replanting after the last frost.
Reduced flowering in shade
Insufficient direct sun is the primary reason for failure to bloom. Even brief shading from overhanging trees or pond-side structures significantly reduces flower production. Relocate to a fully open, sunny position.
Slug and snail grazing on new growth
Emerging stems and young leaves are susceptible to slug damage, especially in spring. Use wildlife-safe slug controls around the pond margin; avoid metaldehyde-based products near water systems.
Prevent blue pickerelweed problems before they start
Most blue pickerelweed issues are care-mismatch, not bad luck. Dial in the basics:
Looking for blue pickerelweed in general rather than its problems? Read the full blue pickerelweed care guide — light, water, soil and feeding.
Blue Pickerelweed problems — FAQ
Why is my blue pickerelweed rhizome rot in cold waterlogged soil?
In climates below zone 8, cold, stagnant water in winter can rot the rhizome. In marginal zones, lift and overwinter the rhizome in a frost-free location in moist soil or a bucket of water indoors, replanting after the last frost.
Why is my blue pickerelweed reduced flowering in shade?
Insufficient direct sun is the primary reason for failure to bloom. Even brief shading from overhanging trees or pond-side structures significantly reduces flower production. Relocate to a fully open, sunny position.
Why is my blue pickerelweed slug and snail grazing on new growth?
Emerging stems and young leaves are susceptible to slug damage, especially in spring. Use wildlife-safe slug controls around the pond margin; avoid metaldehyde-based products near water systems.