Troubleshooting
Polystichum aculeatum problems — and how to fix them
Polystichum aculeatum (Polystichum aculeatum) 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.
Frond scorch
Brown, crisped pinnae tips signal too much sun or a dried-out root zone. Move to deeper shade and keep the soil mulched and evenly moist.
Crown rot
Soft, blackened central crown follows waterlogged winter soil. Improve drainage with grit and avoid planting in low spots that collect water.
Vine weevil
Larvae chew roots and adults notch frond margins; wilting despite moist soil is a clue. Treat with biological nematodes or check the rootball when repotting.
Tattered old fronds
Evergreen fronds look ragged by late winter. Cut back the previous year's foliage in early spring before new croziers unfurl to keep the plant tidy.
Prevent polystichum aculeatum problems before they start
Most polystichum aculeatum issues are care-mismatch, not bad luck. Dial in the basics:
Looking for polystichum aculeatum in general rather than its problems? Read the full polystichum aculeatum care guide — light, water, soil and feeding.
Polystichum aculeatum problems — FAQ
Why is my polystichum aculeatum frond scorch?
Brown, crisped pinnae tips signal too much sun or a dried-out root zone. Move to deeper shade and keep the soil mulched and evenly moist.
Why is my polystichum aculeatum crown rot?
Soft, blackened central crown follows waterlogged winter soil. Improve drainage with grit and avoid planting in low spots that collect water.
Why is my polystichum aculeatum vine weevil?
Larvae chew roots and adults notch frond margins; wilting despite moist soil is a clue. Treat with biological nematodes or check the rootball when repotting.
Why is my polystichum aculeatum tattered old fronds?
Evergreen fronds look ragged by late winter. Cut back the previous year's foliage in early spring before new croziers unfurl to keep the plant tidy.