Troubleshooting
Greater Periwinkle problems — and how to fix them
Greater Periwinkle (Vinca major) 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.
Invasive spread
Vinca major is classified as an invasive weed in California, Oregon, and other states, as well as in parts of Australia and New Zealand. It smothers native groundlayer vegetation in woodland settings. Never plant near natural areas; contain with edging and remove escaped stems promptly.
Root and stem rot
Phytophthora and Pythium rots occur in poorly drained or overwatered conditions, causing rapid wilting and blackened stem bases. Improve drainage, avoid overhead irrigation, and do not over-water. Remove and dispose of affected plants; do not replant Vinca in the same spot without improving drainage.
Aphid infestations
Soft new growth attracts aphids, which cluster on shoot tips and undersides of young leaves, causing distortion and sticky honeydew. Blast off with a strong jet of water or apply insecticidal soap. Encourage natural predators such as ladybirds and lacewings.
Prevent greater periwinkle problems before they start
Most greater periwinkle issues are care-mismatch, not bad luck. Dial in the basics:
Greater Periwinkle problems — FAQ
Why is my greater periwinkle invasive spread?
Vinca major is classified as an invasive weed in California, Oregon, and other states, as well as in parts of Australia and New Zealand. It smothers native groundlayer vegetation in woodland settings. Never plant near natural areas; contain with edging and remove escaped stems promptly.
Why is my greater periwinkle root and stem rot?
Phytophthora and Pythium rots occur in poorly drained or overwatered conditions, causing rapid wilting and blackened stem bases. Improve drainage, avoid overhead irrigation, and do not over-water. Remove and dispose of affected plants; do not replant Vinca in the same spot without improving drainage.
Why is my greater periwinkle aphid infestations?
Soft new growth attracts aphids, which cluster on shoot tips and undersides of young leaves, causing distortion and sticky honeydew. Blast off with a strong jet of water or apply insecticidal soap. Encourage natural predators such as ladybirds and lacewings.