Troubleshooting
Common manzanita problems — and how to fix them
Common manzanita (Arctostaphylos manzanita) 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 from summer watering
The number one killer of manzanitas in cultivation. Stop all irrigation once plants are established (after 2 years). Even a single deep summer watering during warm periods can trigger fatal root rot. Plant in exceptionally free-draining positions.
Stem canker (Fusicoccum)
Causes sudden wilting of individual branches, followed by brownish cankers on stems. Remove affected branches well below the canker with sterilised tools. Ensure good air circulation and avoid wounding bark.
Transplant shock and establishment failure
Manzanitas resent root disturbance. Plant from containers in autumn or early winter when rain supports establishment. Avoid amending the planting hole, which can create a 'bathtub' that traps water around roots.
Prevent common manzanita problems before they start
Most common manzanita issues are care-mismatch, not bad luck. Dial in the basics:
Common manzanita problems — FAQ
Why is my common manzanita phytophthora root rot from summer watering?
The number one killer of manzanitas in cultivation. Stop all irrigation once plants are established (after 2 years). Even a single deep summer watering during warm periods can trigger fatal root rot. Plant in exceptionally free-draining positions.
Why is my common manzanita stem canker (fusicoccum)?
Causes sudden wilting of individual branches, followed by brownish cankers on stems. Remove affected branches well below the canker with sterilised tools. Ensure good air circulation and avoid wounding bark.
Why is my common manzanita transplant shock and establishment failure?
Manzanitas resent root disturbance. Plant from containers in autumn or early winter when rain supports establishment. Avoid amending the planting hole, which can create a 'bathtub' that traps water around roots.