Troubleshooting
Mahonia aquifolium Apollo problems — and how to fix them
Mahonia aquifolium Apollo (Mahonia aquifolium 'Apollo') 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.
Mahonia rust
Bright orange-brown pustules on leaves, worse in damp, crowded conditions; remove affected foliage, improve airflow and avoid wetting leaves.
Powdery mildew
White coating on leaves in dry-root, humid-air situations; keep roots mulched and moist and thin congested growth.
Leaf yellowing in sun
Too much hot, dry sun or alkaline stress can chlorose the leaves; move to shadier conditions or mulch and feed to compensate.
Sparse flowering
Deep shade or hard, ill-timed pruning reduces bloom; prune lightly after flowering and give a little more light.
Prevent mahonia aquifolium apollo problems before they start
Most mahonia aquifolium apollo issues are care-mismatch, not bad luck. Dial in the basics:
Looking for mahonia aquifolium apollo in general rather than its problems? Read the full mahonia aquifolium apollo care guide — light, water, soil and feeding.
Mahonia aquifolium Apollo problems — FAQ
Why is my mahonia aquifolium apollo mahonia rust?
Bright orange-brown pustules on leaves, worse in damp, crowded conditions; remove affected foliage, improve airflow and avoid wetting leaves.
Why is my mahonia aquifolium apollo powdery mildew?
White coating on leaves in dry-root, humid-air situations; keep roots mulched and moist and thin congested growth.
Why is my mahonia aquifolium apollo leaf yellowing in sun?
Too much hot, dry sun or alkaline stress can chlorose the leaves; move to shadier conditions or mulch and feed to compensate.
Why is my mahonia aquifolium apollo sparse flowering?
Deep shade or hard, ill-timed pruning reduces bloom; prune lightly after flowering and give a little more light.