Troubleshooting
Catesby's Trillium problems — and how to fix them
Catesby's Trillium (Trillium catesbaei) 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.
Slugs and snails
Emerging spring shoots are extremely vulnerable to slug and snail damage, which can destroy the single stem before flowering. Apply iron phosphate pellets around the planting area as soon as new growth is visible in late winter or early spring.
Failure to flower after transplanting
Trillium catesbaei is sensitive to root disturbance and may not produce a flower for one or two seasons after being moved or planted. Purchase nursery-propagated stock and disturb the rhizome as little as possible; never collect plants from the wild.
Rhizome rot in wet soil
Rhizomes are prone to rotting in poorly drained or compacted soil. Choose a site with free drainage and incorporate plenty of leaf mould to create an open, moisture-retentive but aerated root zone.
Prevent catesby's trillium problems before they start
Most catesby's trillium issues are care-mismatch, not bad luck. Dial in the basics:
Catesby's Trillium problems — FAQ
Why is my catesby's trillium slugs and snails?
Emerging spring shoots are extremely vulnerable to slug and snail damage, which can destroy the single stem before flowering. Apply iron phosphate pellets around the planting area as soon as new growth is visible in late winter or early spring.
Why is my catesby's trillium failure to flower after transplanting?
Trillium catesbaei is sensitive to root disturbance and may not produce a flower for one or two seasons after being moved or planted. Purchase nursery-propagated stock and disturb the rhizome as little as possible; never collect plants from the wild.
Why is my catesby's trillium rhizome rot in wet soil?
Rhizomes are prone to rotting in poorly drained or compacted soil. Choose a site with free drainage and incorporate plenty of leaf mould to create an open, moisture-retentive but aerated root zone.