Troubleshooting
Red Creeping Thyme problems — and how to fix them
Red Creeping Thyme (Thymus serpyllum 'Coccineus') 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.
Root rot in wet soil
The primary killer of creeping thyme. Yellowing stems that collapse at the base indicate root rot. Improve drainage immediately by incorporating grit and raising the planting area. Remove and destroy affected sections; do not compost.
Woody dieback
Older stems become woody and bare in the centre after several years. Shear lightly by one-third immediately after flowering to stimulate fresh basal growth and prevent the mat from opening up.
Aphids
Colonies of aphids may cluster on tender shoot tips in spring. Blast off with a strong jet of water or apply insecticidal soap. Heavy infestations weaken new growth before flowering.
Prevent red creeping thyme problems before they start
Most red creeping thyme issues are care-mismatch, not bad luck. Dial in the basics:
Red Creeping Thyme problems — FAQ
Why is my red creeping thyme root rot in wet soil?
The primary killer of creeping thyme. Yellowing stems that collapse at the base indicate root rot. Improve drainage immediately by incorporating grit and raising the planting area. Remove and destroy affected sections; do not compost.
Why is my red creeping thyme woody dieback?
Older stems become woody and bare in the centre after several years. Shear lightly by one-third immediately after flowering to stimulate fresh basal growth and prevent the mat from opening up.
Why is my red creeping thyme aphids?
Colonies of aphids may cluster on tender shoot tips in spring. Blast off with a strong jet of water or apply insecticidal soap. Heavy infestations weaken new growth before flowering.