Rosemary is one of the most rewarding herbs for a low-maintenance garden. Once established, it tolerates drought, poor soil, strong sun, and coastal wind — conditions that would kill most vegetables. It rewards neglect better than care, which makes it ideal for gardeners who do not want to fuss.
The Right Conditions
Rosemary is native to the Mediterranean and wants full sun, excellent drainage, and moderate fertility. Rich, moist soil — the kind that vegetables love — causes rosemary to grow soft and leggy, then rot at the root zone. Plant in poor to moderately fertile soil or a gritty container mix (50% compost, 50% horticultural grit). A south-facing slope or raised bed corner with gravelly soil is ideal.
Planting
Rosemary can be grown from seed, cuttings, or purchased plants. Growing from seed is slow — plants take two or more years to reach a useful size. Semi-ripe cuttings (15cm stems taken in late summer) root readily in a gritty, free-draining compost and are the quickest way to propagate existing plants. Purchased plants in 9cm pots are usually the most practical option. Plant in spring once the risk of hard frost has passed, or in autumn in mild climates.
Watering
Established rosemary in the ground needs virtually no supplemental watering except during prolonged drought. Container rosemary needs more attention — allow the compost to dry out completely between waterings. Rosemary is far more likely to die from overwatering than from drought. If in doubt, wait another day before watering.
Pruning for Longevity
Without regular pruning, rosemary becomes woody, open at the centre, and decreasingly productive. Prune lightly after flowering in spring, removing up to one-third of the stem length. Never cut back into old woody growth below the leaves — rosemary does not regenerate from bare wood the way lavender does. Regular light pruning keeps plants compact and extends their productive life from a few years to twenty or more.
Harvesting
Harvest by snipping fresh green tips with scissors or secateurs, cutting back to a leaf node to encourage branching. The best flavour is in the newest growth. For drying, cut longer stems in late summer before flowering, strip the leaves, and dry in a warm airy space away from direct sunlight. Dried rosemary retains more flavour than most herbs because the volatile oils are resilient.
FAQ
Why is my rosemary going grey and dying back?
Grey, dying shoots usually indicate root rot from overwatering or poor drainage. Check the soil — if it is consistently wet, the roots are likely damaged. Cut back affected growth to healthy tissue and improve drainage. Do not water until the soil is completely dry.
Can rosemary survive winter in a container?
In most temperate climates, yes. Rosemary is hardy to about -10C (14F) but the roots in a container are more vulnerable than in-ground plants. Move containers against a sheltered wall and wrap the pot in bubble wrap below -5C. Avoid overwatering in winter — root rot in wet, cold conditions is the main risk.
How do I stop rosemary from getting leggy?
Prune regularly and ensure the plant receives full sun. Insufficient light is the primary driver of legginess — a rosemary in shade will always reach for light. Move to a sunnier position if possible.
What are the best rosemary varieties?
Rosmarinus officinalis (common rosemary) is the standard variety with the best flavour. Miss Jessopp Upright is a compact, columnar variety suited to smaller spaces. Prostratus (trailing rosemary) grows low and wide and is excellent for containers and hanging baskets. Tuscan Blue has a stronger flavour and is popular for cooking.
Can I grow rosemary from a supermarket stem?
Yes — strip the lower leaves from a fresh stem, dip in rooting hormone, and insert into damp gritty compost. Keep warm and humid (cover with a plastic bag). Roots should appear within four to six weeks. Not all attempts succeed, so take several cuttings at once.
See also: Best Herbs for Small Raised Beds and How to Grow Basil: The Complete Guide.