Troubleshooting
Tasmanian Tree Fern problems — and how to fix them
Tasmanian Tree Fern (Dicksonia squarrosa) 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 die-back in winter
Normal in cold climates — protect the crown with fleece and the trunk with straw. New fronds unfurl from the central crown in spring if the growing tip is undamaged.
Trunk drying out
Fatal if prolonged — water the trunk directly in dry spells, not just the soil. The fibrous trunk absorbs moisture for the fronds.
Scale insects
May colonise the trunk or frond bases. Remove with a stiff brush and treat with neem oil spray. Repeat at 2-week intervals.
Frost damage to crown
The growing tip is the most frost-sensitive part. Insulate the crown with dry straw or fleece before hard frosts. If the crown is killed, the plant rarely recovers.
Prevent tasmanian tree fern problems before they start
Most tasmanian tree fern issues are care-mismatch, not bad luck. Dial in the basics:
Tasmanian Tree Fern problems — FAQ
Why is my tasmanian tree fern frond die-back in winter?
Normal in cold climates — protect the crown with fleece and the trunk with straw. New fronds unfurl from the central crown in spring if the growing tip is undamaged.
Why is my tasmanian tree fern trunk drying out?
Fatal if prolonged — water the trunk directly in dry spells, not just the soil. The fibrous trunk absorbs moisture for the fronds.
Why is my tasmanian tree fern scale insects?
May colonise the trunk or frond bases. Remove with a stiff brush and treat with neem oil spray. Repeat at 2-week intervals.
Why is my tasmanian tree fern frost damage to crown?
The growing tip is the most frost-sensitive part. Insulate the crown with dry straw or fleece before hard frosts. If the crown is killed, the plant rarely recovers.