Thyme is best cultivated in a hot, sunny location with well-drained soil. It is generally planted in the spring, and thereafter grows as a perennial. It can be propagated by seed, cuttings, or dividing rooted sections of the plant. It tolerates drought well. The plant can take deep freezes and is found growing wild on mountain highlands. It grows well on dry slopes and is propagated by cuttings. It can be pruned after flowering to keep from getting woody.
To properly nurture your thyme plant, water it only occasionally—every other week or even once a month should suffice, depending on your outdoor climate. You should wait until the soil is completely dry, then water to saturation, then allow it to dry out again. Thyme is also drought-resistant, so don't fret if you go an extra few days without giving it water.
Thyme needs a growing area with plenty of sunlight. Indoors, find a sunny window for your thyme. In the garden, intersperse among other drought-tolerant perennials in an area that receives full sun.
Treat thyme plants each spring with a diluted all-purpose fertilizer. Keeping the fertilizer at half-strength will keep the plant from producing too much foliage, which can dilute its fragrant oils.
In late fall, after the first frost, select one-third of the oldest and woodiest stems on your thyme plant. Using sharp, clean shears, cut these stems back by half. Repeat the process the next year until your thyme plant has returned to growing younger, more tender stems all over the plant.
This is usually 2 to 3 weeks before the last spring frost in well-drained soil about 9 inches apart. Space young plants 12 to 24 inches apart, depending upon the specific variety. The plants should grow 6 to 12 inches in height.