The Clemson HGIC herbs factsheet says rosemary grows best in dry, sunny areas, that herbs grown inside need plenty of sunlight from a south- or west-facing window, and that herbs should be watered thoroughly and then allowed to dry out somewhat. The ASPCA lists rosemary, Rosmarinus officinalis, as non-toxic to dogs, cats and horses. Clemson's page is written mostly for outdoor gardens, so indoor detail is thin.
What the sources say
| Topic | What the source says |
|---|---|
| Light | Sunny for at least six hours a day; south- or west-facing window indoors (Clemson) |
| Site | Dry, sunny areas (Clemson) |
| Water | Thoroughly, then let the soil dry somewhat (Clemson) |
| Soil | Well drained, pH 6 to 7, moderate organic matter; very fertile soil makes lush leaves that lack flavor (Clemson) |
| Pests | Spider mites thrive in dry conditions (Clemson) |
| Pets | Non-toxic to dogs, cats and horses (ASPCA) |
Harvest
Clemson says to prune or harvest herbs regularly for vigorous, sturdy growth, and to harvest early in the morning after the dew dries. It gives no rosemary-specific harvest timing. See Fragrant Herbs to Grow Indoors for other herbs.
What the sources do not cover
Clemson gives no pot size, mix, indoor humidity, winter care or indoor light supplement for rosemary. For a plant that shares its dry, sunny preference, see Why Indoor Lavender Dies.
Frequently asked questions
Does rosemary need full sun?
Clemson says herbs grow best in at least six hours of sun, and rosemary in dry, sunny areas.
How often should I water rosemary?
Thoroughly, then let the soil dry somewhat, according to Clemson. It gives no interval.
Is rosemary safe for cats?
The ASPCA lists it as non-toxic to cats, dogs and horses.
Sources read for this page
Last reviewed 15 October 2026. Written by Md. Firozur Rahman. This page gives general guidance and cannot diagnose a plant from a description; see the Disclaimer.
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