Thyme Seeds - Thymus Vulgaris

4, 5, 6, 7, 8, 9, 10, 11

USDA Zones 4-11 - Grows as a perennial herb in most regions and as a cold-tolerant annual in the coldest zones. It is highly adaptable but dislikes wet, soggy roots, especially in winter.

Best performance in Zones 4-9 where it can be grown as a perennial.

Northern zones (4-6) - Plant seeds indoors 6-8 weeks before the last expected frost date. Can also be direct sown in the spring after all danger of frost has passed. Mulch heavily in late fall to protect the roots from extreme winter cold.

Hot climate zones (9-11) - Thyme thrives in the heat but requires excellent drainage. Plant in early spring or fall. In areas with high humidity, ensure good air circulation to prevent fungal issues.

Soil temperature critical - Requires a cool to warm soil for germination, with an optimal temperature range of 60-70F.

Growing season needs - As a perennial, it will establish in the first year and provide an abundant harvest in subsequent years. It is a slow-growing herb at the start but becomes very robust.

Learn more about USDA Hardiness Zones here

When to Plant:
Start seeds indoors 6-8 weeks before your last expected frost date, as thyme seeds are slow to germinate. You can also direct sow seeds outdoors in the spring after the last frost has passed and the soil has warmed.

Location and Soil:
Choose a location that receives full sun (at least 6-8 hours of direct sunlight per day). Thyme is not particular about soil fertility, but it is essential that the soil is well-draining. It will not tolerate "wet feet." In clay or heavy soils, amend with sand or grit to improve drainage. A soil pH between 6.0 and 8.0 is acceptable.

Starting Seeds:

Sowing Indoors: Fill seed starting trays with a well-draining seed starting mix. Sow the very tiny seeds on the surface of the soil and do not cover, as they require light to germinate.

Gently mist the soil to moisten it. Keep the soil consistently moist but not soggy until seedlings emerge, which can take 14-21 days or longer.

Sowing Outdoors: Prepare a seedbed by raking the soil smooth. Scatter the seeds over the surface and lightly press them into the soil.

Care and Maintenance:

Watering: Water regularly until the plants are established. Once mature, thyme is extremely drought-tolerant. Allow the soil to dry out between waterings.

Fertilizing: Thyme does not require rich soil and generally does not need to be fertilized. Over-fertilizing can lead to weak, less-aromatic growth.

Pruning: To maintain a bushy shape and prevent the plant from becoming woody, prune it back by about one-third in early spring. You can also lightly trim it after flowering.

Harvesting: Harvest sprigs of thyme as needed throughout the growing season. The best time to harvest is just before the plant flowers, when the oils and flavor are most concentrated.

Important Considerations:
Thyme is a slow-growing herb in its first year. Be patient, as it will establish a strong root system and reward you with a more robust plant in its second and third years. In colder climates, a layer of mulch around the base of the plant in late fall can help protect it from winter damage.