How to Grow Thyme in Michigan: A Cold-Hardy Herb
Thyme (Thymus vulgaris) is a hardy, aromatic herb that thrives in a variety of climates, including Michigan’s cooler regions. With its low-growing habit and strong flavor, thyme is a versatile herb that works well in garden beds, containers, or as ground cover.
Michigan’s Climate
Michigan’s climate features cold winters and relatively mild summers, making it a great place to grow thyme. Thyme is a perennial herb that can tolerate frost and can survive Michigan’s winters if given proper care. In southern Michigan, the growing season is longer, but even in northern parts of the state, thyme can be grown with success.
Preparing the Soil
Thyme prefers well-draining, slightly alkaline to neutral soil with a pH between 6.0 and 8.0. Michigan soils vary from sandy loam to heavy clay, so it’s essential to amend the soil with compost or sand to improve drainage, especially in areas with clay-heavy soil. Thyme does well in poorer soils and doesn’t require a lot of nutrients, but adding some organic matter can give young plants a good start.
Planting Thyme
In Michigan, you can plant thyme in the garden after the last frost, typically around mid-May. Thyme can be started from seeds, but because the seeds are slow to germinate, it’s often easier to grow thyme from transplants or cuttings. Plant thyme seedlings about 12 inches apart to give them room to spread. Thyme loves full sun, so choose a sunny spot in your garden.
For those in northern Michigan or areas with harsher winters, growing thyme in containers allows you to move it indoors during the coldest months.
Watering and Care
Once established, thyme is a drought-tolerant plant and prefers slightly dry conditions. Water thyme sparingly, allowing the soil to dry out between watering. Overwatering can lead to root rot, especially in Michigan’s cooler and wetter spring months.
Thyme doesn’t require much maintenance. Simply prune it back after flowering to encourage new growth and prevent the plant from becoming woody. Mulching around the plant can help protect the roots during Michigan’s cold winters.
Harvesting Thyme
Thyme can be harvested once the plant has reached 6 inches in height. Snip off the top few inches of growth, being careful not to cut into the woody part of the plant. Regularly harvesting thyme encourages bushier growth and more leaves.
Thyme can also be dried for later use. Harvest sprigs just before the plant flowers for the most intense flavor. Hang the sprigs upside down in a dry, airy place until the leaves are fully dried.
