How to Grow Mugwort
Artemisia vulgaris
Mugwort is a tough, fast-growing perennial herb tolerating almost any soil and aspect. Plant in full sun to part shade, water until established, then leave it largely to its own devices. Its main management task is containment — cut back hard each autumn or spring and watch for rhizome spread into neighbouring beds. Young leaves are harvested before flowering for culinary and medicinal use.
Yearly Lifecycle
Care Essentials
Rarely needed. Mugwort thrives in poor to average soil — excess feeding encourages lush but weak growth and increases invasiveness.
Watch For
- Aphids on new shoots
- Powdery mildew in humid conditions
- Aggressive rhizome spread into neighbouring beds
Companions
Yarrow, Echinacea, Valerian, Fennel
Pet Safety
Care Requirements
Light
Full sun to part shade; tolerates most aspects
Grows best in full sun but tolerates partial shade. More shade produces taller, leggier growth with slightly less aromatic foliage.
Watering
Water until established; drought tolerant once settled
Water regularly for the first season until established. Thereafter extremely drought tolerant — only water during prolonged dry spells.
Fertilizing
Rarely needed; thrives in poor soil
Does not require feeding. Rich soil encourages excessive, floppy growth and can increase invasiveness. A light top-dress of compost every few years is sufficient.
Pruning
Cut back hard in autumn or spring to control size
Cut all stems to near ground level in late autumn or early spring. Trim lightly through summer to prevent self-seeding and keep growth compact.
Mulching
Light mulch to suppress weeds around the base
A thin layer of mulch around the base helps suppress weeds. Avoid heavy mulch over the crown which can cause rot in wet winters.
Growing Tips
Contain the roots
Mugwort spreads aggressively via underground rhizomes. Sink a root barrier 30-40 cm deep around the planting area, or grow in a large buried container to stop it colonising the entire bed.
Cut before it seeds
Mugwort self-seeds freely. Cut the flowering stems before seeds ripen in late summer to prevent unwanted seedlings throughout the garden.
Harvest young for flavour
The youngest leaves and shoot tips have the most aromatic volatile oils. Harvest in the morning before the heat of the day drives off the essential oils.
