Lemon
Balm.

Lemon balm is safe— grow it freely.

Yes — lemon balm is safe for cats. The ASPCA lists it as non-toxic. This fragrant herb from the mint family is completely cat-safe and a lovely addition to any windowsill herb garden.

ASPCA Data

According to the ASPCA:

Toxic Principles: Non-toxic. (Listed under Plants Non-Toxic to Cats.)

Lemon balm carries no toxins — no calcium oxalates, no essential oils that irritate, no gastrointestinal irritants. You can grow it, let your cat walk past it, even nibble the leaves with zero risk.

Is Your Cat Interested in Lemon Balm?

Some cats find lemon balm mildly interesting — similar to (but usually less intense than) catnip. The scent may produce a mild attraction or brief interest, though not all cats respond the same way.

This is anecdotal and not clinically documented, but gardeners report:

• Some cats show curiosity and brush against the plant
• A few cats will nibble the leaves (harmless, non-toxic)
• Most cats are indifferent
• Very few show the sustained interest typical of catnip response

If your cat becomes obsessed and damages the plant, move it to a high shelf or less accessible location — but not because of toxin risk. Simply to preserve your herb.

Growing Lemon Balm

Lemon balm thrives on a sunny windowsill and is nearly impossible to kill:

Light: 6+ hours of sunlight daily — a south or west-facing window is ideal.

Water: Keep the soil moist but not waterlogged. Water when the top inch of soil feels dry. These herbs dislike sitting in standing water.

Soil: Standard potting mix or garden soil mixed with compost. Lemon balm is not fussy about fertility.

Pinching: Pinch back the top 2–3 leaves weekly to encourage bushiness and prevent legginess. The more you harvest, the bushier the plant becomes.

Lemon Balm + Catnip Garden

If you already grow catnip, lemon balm is a natural companion. Both are:

• Lamiaceae family herbs
• Non-toxic to cats
• Fast-growing on windowsills
• Enjoyable for humans (tea, cooking) and occasionally for cats

Plant them side by side and let your cat explore both. One may spark their interest more than the other — or neither will, and that's fine. No toxin worry either way.

Safe Cultivars

All varieties of Melissa officinalis are safe:

• Green lemon balm — The standard type, most common, vibrant growth
• Golden lemon balm (cv. Aurea) — Yellow-variegated leaves, slower growth, ornamental
• Variegated lemon balm (cv. Variegata) — White-margined leaves, decorative

Pick whichever appeals to you. All are equally non-toxic.

The Bottom Line

Lemon balm is a cat-safe herb that you can grow freely on a windowsill without any concern. It's fragrant, attractive, easy to grow, and completely non-toxic. Some cats will show interest; most won't. Either way, there's no risk.

All parts of the plant — leaves, stems, and roots — are safe. Grow it, harvest it for tea, and let your cat enjoy your garden space.