Troubleshooting
Kauri problems — and how to fix them
Kauri (Agathis australis) 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.
Kauri dieback disease (Phytophthora agathidicida)
A devastating water mould specific to kauri, causing root and collar rot, yellowing foliage, and death. Spread through contaminated soil on boots and tools. In cultivation, use sterile substrate, avoid reusing soil from infected sites, and clean pots thoroughly. No cure exists — biosecurity is critical.
Root rot from overwatering
Container-grown kauri is susceptible to Pythium and Phytophthora root rot if kept too wet. Ensure excellent drainage, use a well-aerated compost, and allow partial drying between waterings.
Low humidity foliage browning
Dry heated air under glass or in centrally heated rooms causes tip browning and premature leaf drop. Increase humidity by standing on damp gravel, regular misting, or grouping with other plants.
Prevent kauri problems before they start
Most kauri issues are care-mismatch, not bad luck. Dial in the basics:
Looking for kauri in general rather than its problems? Read the full kauri care guide — light, water, soil and feeding.
Kauri problems — FAQ
Why is my kauri kauri dieback disease (phytophthora agathidicida)?
A devastating water mould specific to kauri, causing root and collar rot, yellowing foliage, and death. Spread through contaminated soil on boots and tools. In cultivation, use sterile substrate, avoid reusing soil from infected sites, and clean pots thoroughly. No cure exists — biosecurity is critical.
Why is my kauri root rot from overwatering?
Container-grown kauri is susceptible to Pythium and Phytophthora root rot if kept too wet. Ensure excellent drainage, use a well-aerated compost, and allow partial drying between waterings.
Why is my kauri low humidity foliage browning?
Dry heated air under glass or in centrally heated rooms causes tip browning and premature leaf drop. Increase humidity by standing on damp gravel, regular misting, or grouping with other plants.