Troubleshooting
Slender Aubrieta problems — and how to fix them
Slender Aubrieta (Aubrieta gracilis) 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.
Aphids
Colonies of greenfly and blackfly are the most common pest, targeting soft new growth in spring. Treat with a strong water jet, insecticidal soap, or neem oil; natural predators such as ladybirds provide good biological control.
Woody dieback and bare centres
Without hard pruning after flowering, aubrieta becomes woody, open, and much less floriferous within a few seasons. Cut back by two-thirds immediately after the last flowers fade to stimulate a dense, compact flush of new growth.
Root and stem rot in wet winters
Heavy, moisture-retentive soil combined with winter wet causes root rot, particularly at the base of stems. Improve drainage before planting and avoid mulching with moisture-retaining organic material over the crown.
Prevent slender aubrieta problems before they start
Most slender aubrieta issues are care-mismatch, not bad luck. Dial in the basics:
Slender Aubrieta problems — FAQ
Why is my slender aubrieta aphids?
Colonies of greenfly and blackfly are the most common pest, targeting soft new growth in spring. Treat with a strong water jet, insecticidal soap, or neem oil; natural predators such as ladybirds provide good biological control.
Why is my slender aubrieta woody dieback and bare centres?
Without hard pruning after flowering, aubrieta becomes woody, open, and much less floriferous within a few seasons. Cut back by two-thirds immediately after the last flowers fade to stimulate a dense, compact flush of new growth.
Why is my slender aubrieta root and stem rot in wet winters?
Heavy, moisture-retentive soil combined with winter wet causes root rot, particularly at the base of stems. Improve drainage before planting and avoid mulching with moisture-retaining organic material over the crown.