Troubleshooting
Hylotelephium 'Autumn Joy' problems — and how to fix them
Hylotelephium 'Autumn Joy' (Hylotelephium 'Autumn Joy') 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.
Floppy, splayed stems
Caused by too-rich soil, over-feeding or shade. Grow hard in lean soil and full sun, or use the Chelsea chop in late spring to encourage shorter, sturdier growth.
Crown and root rot
Waterlogged or heavy clay soil rots the crown over winter. Improve drainage with grit and never let the plant sit in standing water.
Aphids and slugs/snails
Aphids cluster on soft new shoots; slugs and snails graze emerging spring growth. Hose off aphids and protect young clumps in damp spring weather.
Powdery mildew
Appears as a white film in humid, crowded conditions. Improve air flow and avoid overhead watering; rarely serious.
Prevent hylotelephium 'autumn joy' problems before they start
Most hylotelephium 'autumn joy' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for hylotelephium 'autumn joy' in general rather than its problems? Read the full hylotelephium 'autumn joy' care guide — light, water, soil and feeding.
Hylotelephium 'Autumn Joy' problems — FAQ
Why is my hylotelephium 'autumn joy' floppy, splayed stems?
Caused by too-rich soil, over-feeding or shade. Grow hard in lean soil and full sun, or use the Chelsea chop in late spring to encourage shorter, sturdier growth.
Why is my hylotelephium 'autumn joy' crown and root rot?
Waterlogged or heavy clay soil rots the crown over winter. Improve drainage with grit and never let the plant sit in standing water.
Why is my hylotelephium 'autumn joy' aphids and slugs/snails?
Aphids cluster on soft new shoots; slugs and snails graze emerging spring growth. Hose off aphids and protect young clumps in damp spring weather.
Why is my hylotelephium 'autumn joy' powdery mildew?
Appears as a white film in humid, crowded conditions. Improve air flow and avoid overhead watering; rarely serious.