Thyme care guide: when & how to prune, fertilize and spray
Thymus vulgaris · USDA zones 5–9
Low, woody Mediterranean herb. It needs sharp drainage and yearly light trimming to stay full.
☀️ Sun
Full sun.
💧 Water
Low.
🪱 Soil
pH 6.0–8.0. Sandy, gravelly. None.
How and when to prune thyme
Spring trim
When: from the last spring frost to 3 weeks after.
- zones 3–5: about May 10–31
- zones 6–7: about Apr 15 – May 6
- zones 8–10: about Feb 25 – Mar 18
Light trimming as growth resumes keeps the plant compact.
- Shear off the top third of the growth, staying above the woody part.
Trim after flowering
When: 8–10 weeks after the last spring frost.
- zones 3–5: about Jul 5–19
- zones 6–7: about Jun 10–24
- zones 8–10: about Apr 22 – May 6
Removes spent flowers and keeps the plant tidy and leafy.
- Shear off the faded flower stems.
Common thyme problems and how to fix them
Woody, bare centers
Signs: Gaps and dead woody stems in the middle.
What to do: Trim yearly and replace plants every 3–4 years.
Thyme care FAQ
When should I prune thyme?
Spring trim: from the last spring frost to 3 weeks after (around Apr 15 – May 6 in zones 6–7). Trim after flowering: 8–10 weeks after the last spring frost (around Jun 10–24 in zones 6–7). Low, woody Mediterranean herb. It needs sharp drainage and yearly light trimming to stay full.
What soil does thyme need?
Sandy, gravelly. Preferred pH 6.0–8.0. None.
How much sun and water does thyme need?
Sun: Full sun. Water: Low.
What are common thyme problems?
Woody, bare centers: Gaps and dead woody stems in the middle. Trim yearly and replace plants every 3–4 years.
More herbs care guides
Timings are given relative to your average frost dates, with examples for typical US climates. Always read and follow product labels.