Troubleshooting
Giant Hard Fern problems — and how to fix them
Giant Hard Fern (Blechnum tabulare) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Wind scorch and frond browning
Cold, drying winds are the chief enemy of this fern in UK gardens. Site in a sheltered position and apply a deep mulch over the crown before hard frosts; in very exposed gardens protect with horticultural fleece in winter.
Crown rot in wet winters
The developing trunk-like rhizome is susceptible to rotting in cold, waterlogged soil. Ensure excellent drainage at the planting site and raise the crown slightly above the surrounding soil level.
Prevent giant hard fern problems before they start
Most giant hard fern issues are care-mismatch, not bad luck. Dial in the basics:
Giant Hard Fern problems — FAQ
Why is my giant hard fern wind scorch and frond browning?
Cold, drying winds are the chief enemy of this fern in UK gardens. Site in a sheltered position and apply a deep mulch over the crown before hard frosts; in very exposed gardens protect with horticultural fleece in winter.
Why is my giant hard fern crown rot in wet winters?
The developing trunk-like rhizome is susceptible to rotting in cold, waterlogged soil. Ensure excellent drainage at the planting site and raise the crown slightly above the surrounding soil level.