How to Grow Thyme

Start thyme indoors about 8–10 weeks before the expected last spring frost, or direct sow outdoors after the soil has warmed. Thyme grows slowly from seed, so indoor starting gives seedlings more time to develop before transplanting.

Set well-rooted plants outdoors after severe frost has passed. In mild climates, thyme may also be planted in early fall, allowing roots to establish before winter. Established plants are perennial where drainage and cold conditions suit them.

Thyme seed is very small. Sow it on the surface of moist seed-starting mix and cover only lightly, if at all. Keep the surface evenly moist until germination, which may take two to four weeks.

Provide strong light and good airflow once seedlings emerge. Transplant carefully after hardening, spacing plants about 8–12 inches apart depending on the variety and growth habit.

Thyme also grows well in containers, especially where the potting mix drains freely and plants receive plenty of sun.

Choose a site with full sun and sharp drainage. Thyme performs best in lean to moderately fertile soil and does not need heavy feeding.

Water regularly while plants are becoming established, then allow the soil to dry slightly between waterings. Trim lightly after flowering to encourage fresh growth and keep plants compact, but avoid cutting deeply into bare old wood.

Thyme works well beside rosemary, sage, oregano, lavender, and other herbs that prefer dry, sunny conditions. Its flowers attract bees, hoverflies, and other beneficial insects, making it useful along vegetable-bed edges, pollinator strips, and mixed herb plantings.

Choose a site with full sun and sharp drainage. Thyme performs best in lean to moderately fertile soil and does not need heavy feeding.

Water regularly while plants are becoming established, then allow the soil to dry slightly between waterings. Trim lightly after flowering to encourage fresh growth and keep plants compact, but avoid cutting deeply into bare old wood.

Thyme works well beside rosemary, sage, oregano, lavender, and other herbs that prefer dry, sunny conditions. Its flowers attract bees, hoverflies, and other beneficial insects, making it useful along vegetable-bed edges, pollinator strips, and mixed herb plantings.

Thyme contains fragrant essential oils and naturally occurring plant compounds that give the herb its strong, savory aroma and flavor.

Use thyme in soups, beans, roasted vegetables, potatoes, breads, meats, marinades, herb butter, stuffing, sauces, and Mediterranean-style herb blends. The small flowers are also edible and can be used as a delicate garnish.

Thyme generally has few pest problems, though aphids, spider mites, or small chewing insects may occasionally appear, especially on stressed plants.

Poor drainage is the greater concern. Wet soil, overcrowding, and heavy mulch around the crown can lead to root decline, stem rot, or mildew. Keep plants open to light and air, and water near the soil rather than over the foliage.

Thyme is an insect-pollinated perennial, and different thyme varieties may cross when flowering nearby. Grow one variety for seed or provide generous isolation if maintaining a particular type.

Select healthy plants with strong fragrance, compact growth, and the leaf qualities you want to preserve. Allow some flower heads to remain until they turn brown and dry.

Cut mature stems before seed scatters heavily, finish drying them under cover, then rub or thresh the heads to release the tiny seed. Remove chaff and store fully dry seed in a labeled container in a cool, dark place.

• Be patient with slow, tiny seedlings.
• Prioritize drainage over fertility.
• Trim lightly after flowering to maintain shape.
• Avoid cutting deeply into bare woody stems.
• Leave some flowers for bees and beneficial insects.