Troubleshooting
Lamb Hass Avocado problems — and how to fix them
Lamb Hass Avocado (Persea americana 'Lamb Hass') 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.
Phytophthora root rot
The main avocado killer, driven by poor drainage and overwatering. Prevent with very free-draining soil, controlled watering and resistant rootstock.
Poor fruit set
Type-A flowering; warm, calm bloom weather and a nearby type-B cultivar improve pollination and yield.
Iron chlorosis
Interveinal yellowing on alkaline or waterlogged soils. Improve drainage, acidify slightly, and apply chelated iron.
Frost and cold damage
Tender below about -1 to -2°C despite good heat tolerance; frost damages growth and fruit. Protect or move under cover in cold weather.
Prevent lamb hass avocado problems before they start
Most lamb hass avocado issues are care-mismatch, not bad luck. Dial in the basics:
Looking for lamb hass avocado in general rather than its problems? Read the full lamb hass avocado care guide — light, water, soil and feeding.
Lamb Hass Avocado problems — FAQ
Why is my lamb hass avocado phytophthora root rot?
The main avocado killer, driven by poor drainage and overwatering. Prevent with very free-draining soil, controlled watering and resistant rootstock.
Why is my lamb hass avocado poor fruit set?
Type-A flowering; warm, calm bloom weather and a nearby type-B cultivar improve pollination and yield.
Why is my lamb hass avocado iron chlorosis?
Interveinal yellowing on alkaline or waterlogged soils. Improve drainage, acidify slightly, and apply chelated iron.
Why is my lamb hass avocado frost and cold damage?
Tender below about -1 to -2°C despite good heat tolerance; frost damages growth and fruit. Protect or move under cover in cold weather.