Thyme
Thymus vulgaris
Creeping, bee-loved carpet said to turn cabbage worm away.
- Type
- Herb · Perennial
- Botanical family
- Mixed / other
- Foliage color
- Green
- Flower color
- Purple and violet
- Sunlight
- Full sun
- Watering
- Low
- Soil
- Poor, dry, free-draining
- Feeding
- Feeding is seldom worth it; the leanest soil gives the strongest flavor.
- USDA zones
- 5a–9b
- Frost tolerant
- Yes
- Flowering
- May
- Pruning
- Shear it lightly once the flowers fade, staying off the old wood.
- Sow indoors
- 56 days before the last spring frost
- Plant out
- at the last spring frost
- First harvest
- 50 days after the last spring frost
- Harvest ends
- 14 days after the first fall frost
- Mar–Mar Bud Break
- Mar–May Harvest
- May–Oct Flowering
- Oct–Dec Growing
- Jan–Mar Growing
- Plant spacing
- 9.8 in
- In-row spacing
- 7.9 in
- Between rows
- 11.8 in
- Square-foot density
- 4 per square
- Root system
- Fine and fibrous, close to the surface
- Working depth
- 6–12 in
- Can reach
- 18 in down where the soil allows
- Spread
- 12–18 in across, about 1–1.5× the width of the plant
- Shallowest pot
- 8 in of soil
The whole root system sits in the top hand-span of soil, so this is the first thing in the bed to feel a dry week and the last thing that should meet a fork. Hoe shallowly around it, and mulch instead of digging.
The habit is Thyme’s own; the figures are what that habit usually comes to at this size, not a measurement of this species. Roots follow the soil either way: a compacted pan, a high water table or heavy clay stops them well short of any of it, and deep open ground lets them go further.
- Cats and dogs
- Confirmed safe
We say a plant is safe only where a named poison-control reference names that exact species and records it as non-toxic to both cats and dogs. Most plants are on nobody’s list, and their absence here is not a judgement about them. This is a record of what those references say, not veterinary advice, and it cannot account for your own animal, the quantity eaten, or a plant treated with anything.
- When
- Harvest lightly year-round in mild climates, but the prime window is early–mid summer just before and during first flowering, when the oils peak. Pick mid-morning on a dry day; wet foliage molds quickly after cutting.
- What to look for
- Stems carry dense, healthy small leaves and release strong fragrance when brushed. Buds showing color indicate maximum oil; established plants (from their second year) tolerate the biggest cuts.
- How to harvest
- Snip 8–10cm sprig tips with scissors, cutting into the leafy green growth but never back into bare old wood — thyme resprouts poorly from woody stems. For preserving, shear the top third of the whole plant just before flowering.
- How often
- Regular light picking is fine all season and keeps plants compact; take up to a third at a time. Give the last significant cut by late summer so new growth ripens before winter, and expect to replace woody plants every 3–4 years.
- Storing the crop
- Fresh sprigs keep 1–2 weeks in the fridge in a bag or damp paper. Thyme dries superbly — hang small bunches, then strip the tiny leaves by running fingers down the dry stems — and holds flavor for a year in an airtight jar. Sprigs also freeze whole in bags or in oil.
- Generally trouble-free No notable pest or disease problems when grown in the right conditions — one of the easy ones.
Rosemary, Lavender, Sage, Strawberries
The Greeks burned thyme as incense — its name is linked to a word meaning 'to fumigate'.
Green-leaved herbs with purple and violet flowers, like this one.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com