herb · Lamiaceae
Updated Apr 2026

Thyme

Thymus vulgaris

A creeping Mediterranean perennial that asks for gravel and forgets about you for years.

Thyme

Thyme asks for almost nothing and delivers for years. It came from rocky Mediterranean hillsides where the soil is poor and the rain is seasonal, and it still thrives under those conditions — or, more precisely, it struggles when you give it the opposite. Rich, moist soil produces lush growth that is prone to root rot and winter damage. Gravelly, lean soil produces a shorter, denser, more aromatic plant that can live in the same spot for a decade.

The most common mistake with thyme is overwatering. Young need regular moisture to establish, but once they're rooted in — usually by midsummer of the first year — thyme does best on infrequent, deep watering that lets the soil dry out between sessions. In regions that get more than an inch of rain a week, thyme in a container with good drainage is often the more reliable option than a garden bed in heavy clay.

Start seeds indoors 8 weeks before your . Thyme seeds are small and slow to — expect two to three weeks before you see seedlings. Most gardeners find it easier to buy transplants and set them out 2 weeks after the last frost once the soil has warmed. Space plants 12 inches apart. Thyme is a small plant that spreads outward more than it grows tall, and it appreciates the airflow that comes with adequate spacing.

Harvest by cutting stem tips — don't strip leaves from individual stems. Cut back by one-third after flowering in summer to keep the plant from going too woody. After two or three years, most thyme plants develop a woody center and . When that happens, cut back hard in early spring to force new growth from the base, or divide the plant and replant the younger outer sections. A plant that is never pruned becomes a tangle of bare wood with green tips.

In zones 5 and colder, thyme overwinters best in well-drained raised beds or in gravel- spots where water doesn't sit on the crown. The problem in cold climates isn't usually the cold itself — it's wet soil in late winter, when freeze-thaw cycles can kill the crown. English thyme (T. vulgaris) is more cold-hardy than lemon thyme (T. citriodorus), which may not survive a zone 5 winter reliably.

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Varieties worth knowing

English (T. vulgaris)
The standard culinary thyme. Strong, classic flavor. More cold-hardy than most. The reliable garden choice.
French (narrow-leaf)
Finer texture and slightly more refined flavor than English. Preferred by many cooks for fresh use. Hardy to zone 6.
Lemon (T. citriodorus)
Distinct citrus note that works well in fish dishes, salad dressings, and tea. Less cold-hardy than English thyme; treat as annual in zone 5.
Caraway (T. herba-barona)
Unusual caraway-thyme flavor. Low, mat-forming habit. Good between paving stones. Culinary use is limited but interesting.
Silver Queen
Variegated silver-edged leaves. Mostly ornamental, but the leaves are edible. Tends to be slightly less vigorous than straight species.
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What can go wrong

Root rot in wet or clay soil
The plant wilts and doesn't recover after rain. The crown turns brown and soft. Sharp drainage is the only fix — amend with coarse grit before planting, or switch to a raised bed or container.
Woody, bare center
After two to three years, the center of the plant turns lignified and bare with green only at the tips. Cut back hard in early spring before new growth emerges, or divide and replant the younger sections.
Poor flavor or weak scent
Usually a sign the plant is in too-rich or too-moist soil, or not getting enough sun. Lean conditions and full sun concentrate the volatile oils that give thyme its flavor.
Winter kill in zone 5
Lemon thyme and some ornamental varieties are not reliably hardy below zone 6. Even English thyme can die in wet, poorly drained soil during freeze-thaw cycles. Gravel mulch and good drainage help.
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Companions

Plant with
brassicasstrawberrytomatolavender
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How to propagate

Thyme is best propagated vegetatively — stem cuttings, division, and layering all work well and are faster than seed. Seed is viable but slow and does not always produce plants true to the parent cultivar.

Stem cuttings
moderate70-80% success rate
Late spring to early summer, from new green growth
Take 3-4 inch cuttings from soft, new stem tips (avoid woody older growth). Strip the lower leaves, dip in rooting hormone, and insert into moist perlite or a peat-perlite mix. Keep humid and in bright indirect light. Roots develop in 2-4 weeks. Thyme cuttings root best from actively growing green stems, not the woody parts of the plant.
Division
easy85%+ success rate
Early spring or early fall
Lift an established thyme plant and carefully divide it into smaller sections, each with roots and stems. Replant at the same depth, water in, and provide light shade for a few days. Division is especially useful for creeping thyme varieties that naturally spread and layer themselves.
Layering
easy85%+ success rate
Late spring to early summer
Thyme often layers itself naturally where stems touch the ground. To encourage this, pin a stem to the soil with a wire staple and cover the contact point with a thin layer of soil. Keep moist. Roots form in 4-6 weeks. Sever the rooted section from the parent and transplant. Many creeping thymes propagate themselves this way without any help.
From seed
moderate50-65% success rate
Start indoors 8-10 weeks before last frost
Sow tiny seeds on the surface of moist seed-starting mix — do not cover, as thyme needs light to germinate. Keep at 65-70°F and maintain consistent moisture. Germination is slow and uneven, typically taking 14-28 days. Seedlings are very small and grow slowly. Note that many named thyme cultivars do not come true from seed.

Harvest & keep

Expected yield
Per plant
1–2 cups per cutting, 4–6 cuttings per plant per year
Peak window
20 weeks

Perennial — low shrub; replace every 3–4 years as it gets woody. Many flavored varieties.

Keep the harvest
Refrigerator
1–2 weeks fresh
Freeze
freeze whole sprigs in bags
Can
not applicable
Dry
dry on a screen — holds flavor exceptionally well, 1+ year

Strip leaves from woody stems after drying — the stems snap easily when bone-dry.

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How it grows where you live

Pacific Northwest
The wet Pacific Northwest winter is the main challenge. Thyme grown in ground-level beds in heavy western Oregon or Washington soil tends to rot. Raised beds with added grit, or containers brought under cover in January and February, produce much better results. East of the Cascades, the drier climate suits it well.
Mountain West
Thyme thrives in the dry, gritty soils of the mountain west. Low humidity reduces fungal issues. Drought tolerance means it can handle the dry stretches between irrigation cycles. Mulch lightly in areas with harsh winters and reliable snow cover.
Southwest
Handles heat and alkaline soils well. Water deeply but infrequently. In low desert climates, plant in fall for a spring harvest and expect some dieback in peak summer. Coastal Southern California is among the best climates in the country for long-lived thyme.
Midwest
Hardy to zone 5 with good drainage. The bigger concern than cold is poorly drained flat ground that stays saturated in spring. Raised beds help significantly. Divide plants every two to three years to prevent the center from going woody.
Northeast
English thyme overwinters reliably in zones 5 and 6 with good drainage. In zone 5, a gravel mulch around the crown reduces winter wet damage. Lemon thyme is less dependable in zone 5 — treat it as a tender perennial and expect occasional winter loss.
Southeast
Thyme can struggle in the humid Southeast summers. Plant in a spot with afternoon airflow and make sure the soil never stays wet. In coastal Florida and the Gulf Coast, treat as a cool-season annual — plant in fall, harvest through winter, and expect it to decline in summer heat.
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Sources

Native range: Mediterranean
A general reference — results depend on your soil, weather, and season.