Field guide
How to grow thyme: planting, care, and harvest guide
Thyme typically reaches first harvest in 75–100 days. This guide covers when to plant by USDA zone, common pests, harvest cues, and companion plants where relevant.
Open plannerWhen to plant thyme by USDA zone group
- USDA Zones 1–4 — May to June
- USDA Zones 5–6 — May to June
- USDA Zones 7–8 — April to June
- USDA Zones 9–10 — March to May
- USDA Zones 11–13 — February to April
Companion plants
Good companions: Tomato (Slicing), Pepper (Sweet/Bell), Cabbage
Harvest
When to pick
- Stems have enough new growth to harvest without stripping the plant
- Aromatic oils are strongest before full flowering
How: Cut just above a leaf node in the cool morning and leave most of the plant growing.
Storage: Use fresh, air-dry small bundles, or freeze chopped leaves depending on the herb.
Common pests and problems
Aphids and spider mites
Signs: Fine stippling, webbing, or clustered soft-bodied insects
Control: Rinse foliage, improve airflow, and avoid overfertilizing tender growth.
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