Does rosemary need full sun?

Yes, it thrives in full sun and requires at least six hours of direct light daily.

How often should I water it?

Water only when the top few inches of soil are dry, as it prefers to be on the drier side.

Plant guide

Rosemary.

Salvia rosmarinus Spenn.

Pronounced SAL-vee-uh roz-muh-RYE-nus

Also known as Rosemary

Salvia rosmarinus — Photo by Africa Gomez (CC0) via gbif

Rosemary is a hardy, fragrant herb that brings a Mediterranean feel to any sunny spot. It is a woody perennial that works beautifully in both garden beds and containers. You will love having fresh sprigs right at your fingertips for cooking.

Another photo of Rosemary — Photo by bungaosam83_second (CC BY-SA) via iNaturalist

At a glance

Care level: Moderate
Plant type: Perennial herb
Light: Full sun
Indoor light: Direct sun
Water: Every 7 to 14 days
Mature size: 3 to 5 feet
Growth rate: Medium
Hardiness: USDA 7 to 10
Bloom time: Late winter to mid spring

Care

Ensure your plant has excellent drainage to prevent root rot in the soil. Watch for yellowing leaves which often signal too much moisture or poor air circulation. Give it plenty of airflow to keep it happy and healthy.

Watering: Allow the top few inches of soil to dry out completely before watering again.
Feeding: Feed lightly with a balanced organic fertilizer during the active growing season.
Pruning: Trim back the tips regularly to encourage a bushier shape and prevent woody growth.
Repotting: Move to a slightly larger pot only when the roots start to circle the bottom.
Soil: Sandy, well draining soil
Soil pH: 6.0 to 7.5
Temperature: -12 to 35°C
Humidity: 20 to 50%
Drought tolerance: High
Lifespan: Perennial, typically 10 to 15 years
Fragrance: Strong
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes
Water running straight through without soaking in
Stunted growth despite proper care

Safety

People: It is generally considered safe for culinary use but should be avoided in medicinal amounts by pregnant women.
Children: The woody stems can be sharp, so keep it away from areas where toddlers play.
Contact allergens: Contact with the foliage can cause mild skin irritation in sensitive individuals.
Airborne allergens: The pollen is generally not considered a significant airborne allergen.
Edibility: While widely used as a culinary herb, excessive consumption of concentrated essential oils can be harmful.

How to identify it

Needle like evergreen leaves
Strong pine like fragrance
Small pale blue or violet flowers
Woody stems on mature plants

Height: 0.6 to 1.5m
Spread: 0.6 to 1.2m
Leaves: dark green, silvery green, evergreen
Flowers: blue, purple, white, 0.5 to 1cm

Problems to watch for

Powdery MildewCommon
Root RotCommon
AphidsUncommon
Spider MitesUncommon

By symptom

Check your rosemary from a photo

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Growing it

Propagation: cuttings, seed, layering
When to plant: spring, early autumn
Overwintering: In cold climates, move container plants indoors to a bright, cool room. Ensure they remain dry, as winter moisture is the biggest threat to their survival.
In containers: It grows very well in pots, provided the container has excellent drainage and is at least 30 cm wide.

Stem cuttings

1. Take a 10 cm cutting from a healthy, non flowering stem.
2. Remove the lower leaves from the bottom half.
3. Dip the end in rooting hormone if desired.
4. Place in a pot with moist, sandy soil.
5. Keep in bright, indirect light until roots form.

Group plants with similar low water needs together to prevent overwatering the rosemary.

Grows well with

Sage — They share similar requirements for sun and well drained soil.
Thyme — Both are Mediterranean herbs that thrive in dry, sunny conditions.
Lavender — They make a classic pairing for a fragrant, drought tolerant garden border.

Similar species

Lavender — Shares similar foliage texture and drought tolerance.
Sage — A close relative with similar culinary uses and cultural needs.

Science

Family: Lamiaceae
Genus: Salvia
Order: Lamiales
Class: Magnoliopsida
Native range: Mediterranean region
Conservation: It is not of conservation concern and is widely cultivated.

It is adapted to rocky, well drained soils and coastal winds in its native Mediterranean habitat.

Value to wildlife: early season nectar source, shelter for small insects
Pollinators: bees, butterflies
Uses: culinary herb, ornamental shrub, pollinator garden, hedging

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Light: 8/9
Nutrients: 3/9
Salinity: 5/9
Soil reaction: 7/9
Temperature: 6/9
Moisture: 2/9

Taxonomy resolved against GBIF.

Questions people ask

Does rosemary need full sun?: Yes, it thrives in full sun and requires at least six hours of direct light daily.
How often should I water it?: Water only when the top few inches of soil are dry, as it prefers to be on the drier side.

Where the name comes from

The genus name Salvia refers to its relationship to sage, while the species name rosmarinus reflects its coastal origins.

Good to know

The name rosemary comes from the Latin ros marinus, meaning dew of the sea.
It was once believed to improve memory and was worn as a symbol of remembrance.
Rosemary can live for many years if provided with excellent drainage.

Also in

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.