Water rosemary deeply every 1 to 2 weeks, and let the soil dry out almost completely between drinks. Potted rosemary outdoors may need water every 5 to 7 days in summer. Established plants in the ground rarely need any. Wet roots are the main reason rosemary dies.
A starting point, not a rule. Check the soil before each watering and stretch the gap in cool, cloudy weather.
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Rosemary is a Mediterranean shrub that grows wild on dry, rocky hillsides. It handles heat, wind, and poor soil with ease, and it keeps one firm rule: never leave its roots wet.
Because of that, rosemary dies from too much care far more often than from neglect. Water it deeply, then let the soil dry out before you water again.
Rosemary watering schedule
| Where it grows | How often |
|---|---|
| In the ground, first season | Once a week |
| In the ground, established | Every 2 to 4 weeks in dry spells |
| Outdoor pots in summer | Every 5 to 7 days |
| Indoor pots | Every 1 to 2 weeks |
| Winter indoors | Every 2 to 3 weeks |
These numbers are only a starting point. Hot wind, small pots, and terracotta all dry the soil faster, so check before you water.
How to tell when rosemary needs water
Push a finger 2 inches into the soil. If it feels completely dry, water. If you feel any dampness, wait a few days.
Thirsty rosemary looks a little dull, and the needles lose their sharp scent. Dry plants can also curl their needles inward. Give a deep drink and they recover quickly.
How to water rosemary
- Water in the morning. The plant dries out during the day and stays healthy overnight.
- Soak the soil, not the needles. Wet foliage encourages mildew, especially indoors.
- Water until it drains. In pots, let water run freely from the bottom and empty the saucer.
- Wait for dry soil. Do not water again until the top 2 inches are dry.
Signs of overwatering and underwatering
Too much water
- Needles yellowing from the base up
- Soft, black stems
- Gray mold or white fuzz
- Soil that smells musty
Too little water
- Dry, brittle, gray needles
- Branch tips that brown and die
- A shrunken, dull plant
- Soil pulling from the pot edge
Why rosemary struggles indoors
Many indoor rosemary plants fail by midwinter. The cause is usually a mix of low light, still air, and wet soil. Rosemary needs 6 hours of direct sun and a little breeze, which a typical room cannot provide.
Put the pot on a sunny, south facing window, turn it every week, and water less than you expect. A small fan nearby also helps keep the soil from staying damp.
Rosemary pairs well with lavender, which has nearly the same water needs. For a general overview, read the herbs guide.
Rosemary watering FAQ
How often should I water rosemary?
Every 1 to 2 weeks, once the soil is dry 2 inches down. Plants in the ground rarely need water after the first season.
Why is my rosemary turning brown?
Overwatering is the most common cause, especially when the base turns brown first. Dry soil causes browning at the tips.
Does rosemary need a lot of water in summer?
Only in pots. A potted plant in full sun may need a drink every 5 to 7 days, while one in the ground usually does not.
We turn horticulture research and real growing experience into plain-English watering schedules you can actually follow.