Troubleshooting
Stonecrop 'Autumn Joy' problems — and how to fix them
Stonecrop 'Autumn Joy' (Hylotelephium spectabile) 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.
Flopping stems
Caused by excessive shade, over-rich soil, or overwatering; plant in full sun, reduce feeding, and improve drainage.
Root rot
The primary killer of Sedum-types; always plant in well-drained soil and avoid watering before the soil dries out.
Vine weevil
Larvae eat roots causing collapse; apply nematode biological controls in late summer.
Crown rot in winter
Standing water around the crown in winter causes fungal rot; ensure drainage is excellent, especially in heavier soils.
Aphids
Aphid colonies gather on new spring growth; knock off with a water jet or apply insecticidal soap if populations are large.
Prevent stonecrop 'autumn joy' problems before they start
Most stonecrop 'autumn joy' issues are care-mismatch, not bad luck. Dial in the basics:
Stonecrop 'Autumn Joy' problems — FAQ
Why is my stonecrop 'autumn joy' flopping stems?
Caused by excessive shade, over-rich soil, or overwatering; plant in full sun, reduce feeding, and improve drainage.
Why is my stonecrop 'autumn joy' root rot?
The primary killer of Sedum-types; always plant in well-drained soil and avoid watering before the soil dries out.
Why is my stonecrop 'autumn joy' vine weevil?
Larvae eat roots causing collapse; apply nematode biological controls in late summer.
Why is my stonecrop 'autumn joy' crown rot in winter?
Standing water around the crown in winter causes fungal rot; ensure drainage is excellent, especially in heavier soils.
Why is my stonecrop 'autumn joy' aphids?
Aphid colonies gather on new spring growth; knock off with a water jet or apply insecticidal soap if populations are large.