Troubleshooting
Azalea 'Hino-Crimson' problems — and how to fix them
Azalea 'Hino-Crimson' (Rhododendron 'Hino-Crimson') 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.
Chlorosis from alkaline soil
Yellowing of leaves signals high pH. Water with collected rainwater and apply chelated iron; for persistent cases, re-pot in fresh ericaceous compost.
Lace bug damage
Tiny insects cause stippled, pale foliage. More prevalent in sunny, dry positions. Improve shade and moisture; treat with a systemic insecticide if severe.
Vine weevil
Adult notching of leaves and larval root destruction. Use biological nematode treatments applied to moist compost in late summer.
Petal blight
Brown water-soaked patches on flowers during wet spring weather (Ovulinia azaleae). Collect and dispose of fallen flowers promptly; apply a fungicide preventively in wet springs.
Poor flowering after moving
Transplanting stress can suppress blooming for a season. Water well and mulch after moving; do not feed heavily in the first year.
Prevent azalea 'hino-crimson' problems before they start
Most azalea 'hino-crimson' issues are care-mismatch, not bad luck. Dial in the basics:
Azalea 'Hino-Crimson' problems — FAQ
Why is my azalea 'hino-crimson' chlorosis from alkaline soil?
Yellowing of leaves signals high pH. Water with collected rainwater and apply chelated iron; for persistent cases, re-pot in fresh ericaceous compost.
Why is my azalea 'hino-crimson' lace bug damage?
Tiny insects cause stippled, pale foliage. More prevalent in sunny, dry positions. Improve shade and moisture; treat with a systemic insecticide if severe.
Why is my azalea 'hino-crimson' vine weevil?
Adult notching of leaves and larval root destruction. Use biological nematode treatments applied to moist compost in late summer.
Why is my azalea 'hino-crimson' petal blight?
Brown water-soaked patches on flowers during wet spring weather (Ovulinia azaleae). Collect and dispose of fallen flowers promptly; apply a fungicide preventively in wet springs.
Why is my azalea 'hino-crimson' poor flowering after moving?
Transplanting stress can suppress blooming for a season. Water well and mulch after moving; do not feed heavily in the first year.