The Clemson HGIC herbs factsheet says almost all herbs grow best where it is sunny for at least six hours a day, that herbs grown inside need plenty of sunlight from a south- or west-facing window, and to water thoroughly then let the soil dry out somewhat. The ASPCA lists rosemary and basil as non-toxic to dogs and cats, and lavender as toxic. Clemson's page is mostly written for outdoor gardens.
What the sources say
| Herb | What Clemson says | ASPCA |
|---|---|---|
| Rosemary | Grows best in dry, sunny areas | Non-toxic to dogs, cats, horses |
| Lavender | Needs sun; see the lavender guides | Toxic to dogs and cats |
| Basil | Among the best herbs for containers; harvest leaves often to prevent flowering | Non-toxic to dogs and cats |
| Lemon verbena | Prefers moist soil; overwinter indoors in a cool area except in zones 9 to 10 | Not checked |
| Mint | Prefers part shade and rich, moist soil; keep in a container | Not checked |
Watering and harvest
Clemson says to water herbs thoroughly and then let the soil dry somewhat, to prune or harvest regularly for sturdy growth, and to harvest early in the morning after the dew dries. Spider mites thrive in dry conditions, so a regular strong stream of water helps discourage them. Lavender-specific advice is in Can You Grow Lavender Indoors?.
What the sources do not cover
Clemson gives no container size, potting mix, indoor humidity, supplemental lighting, or indoor care specific to rosemary, lavender, lemon balm or mint. Pet safety of other herbs is in Pet-Safe Fragrant Houseplants.
Frequently asked questions
Can I grow herbs indoors?
Clemson says herbs grown inside need plenty of sunlight from a south- or west-facing window.
Is rosemary safe for cats?
The ASPCA lists rosemary as non-toxic to dogs, cats and horses.
Which herbs suit containers?
Clemson names basil among the best herbs for containers.
Sources read for this page
- Clemson HGIC herbs factsheet
- ASPCA: Rosemary
- ASPCA: Basil
- ASPCA: Lavender
- RHS lavender growing guide
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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