Troubleshooting
Rock Candytuft problems — and how to fix them
Rock Candytuft (Iberis saxatilis) 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.
Crown and root rot
The primary killer of this species — caused by waterlogged soil or winter wet. Plant in raised beds, troughs, or dry-stone wall crevices to ensure free drainage. Never allow water to pool around the crown.
Poor flowering
Often caused by insufficient light or compacted, nutrient-rich soils. Ensure full sun exposure and grow in lean, gritty conditions that mirror the plant's native limestone scree habitat.
Slug damage to new growth
Young spring shoots can be targeted by slugs, especially in damper gardens. Use grit mulch around plants as a deterrent; iron phosphate-based slug pellets are low-risk to wildlife.
Prevent rock candytuft problems before they start
Most rock candytuft issues are care-mismatch, not bad luck. Dial in the basics:
Rock Candytuft problems — FAQ
Why is my rock candytuft crown and root rot?
The primary killer of this species — caused by waterlogged soil or winter wet. Plant in raised beds, troughs, or dry-stone wall crevices to ensure free drainage. Never allow water to pool around the crown.
Why is my rock candytuft poor flowering?
Often caused by insufficient light or compacted, nutrient-rich soils. Ensure full sun exposure and grow in lean, gritty conditions that mirror the plant's native limestone scree habitat.
Why is my rock candytuft slug damage to new growth?
Young spring shoots can be targeted by slugs, especially in damper gardens. Use grit mulch around plants as a deterrent; iron phosphate-based slug pellets are low-risk to wildlife.