Horse Mint
Mentha longifolia
Family: Lamiaceae
Horse Mint (Mentha longifolia) is a upright houseplant from the Lamiaceae family. Non-toxic to pets. Easy to care for and forgiving.
Complete Care Guide
Light Requirements
Needs several hours of unfiltered sunlight daily. South-facing windowsill or sunroom is ideal.
Watering
Water when the top 1-2 inches of soil feel dry. Consistent moisture is preferred but brief dry periods are tolerated.
Typical schedule: every 7 days (adjust for season and environment).
Humidity
Tolerates dry air without issue. No special humidity measures needed — works great in air-conditioned or heated rooms.
Temperature
Keep between 50–80°F (10–27°C). Avoid cold drafts, heating vents, and sudden temperature changes. This plant tolerates cooler temperatures better than most.
Size & Growth
Mature size: approximately 19 inches tall × 11 inches wide. Growth rate is fast. Habit: upright.
Difficulty Level: 2/5
Easy to moderate care. Forgiving of minor mistakes but benefits from consistent attention. Good for beginners ready for a small step up.
Quick Tips
- ✓Water approximately every 5 days
- ✓Prefers direct light conditions
- ✓Humidity preference: low
- ✓Keep between 50-80°F
Common Problems & Solutions
Brown leaf tips
Cause: Low humidity, inconsistent watering, or mineral buildup from tap water
Fix: Increase humidity with a pebble tray or humidifier. Use filtered water. Water on a consistent schedule.
Pale or leggy growth
Cause: Insufficient light — plant is stretching toward the nearest light source
Fix: Move to a brighter location. Rotate plant quarterly for even growth.
Drooping or wilting
Cause: Usually underwatering or sudden temperature change
Fix: Water thoroughly and ensure consistent moisture. Avoid cold drafts and heating vents.
Pet Safe
Horse Mint is non-toxic and safe for households with cats and dogs. Verified against the ASPCA Toxic and Non-Toxic Plant Database.
Frequently Asked Questions
Is Horse Mint safe for cats and dogs?▼
Yes! Horse Mint is non-toxic to both cats and dogs according to the ASPCA. Safe to keep in homes with pets.
How often should I water Horse Mint?▼
Water approximately every 7 days, but always check the soil first. Water when the top 1-2 inches of soil feel dry. Consistent moisture is preferred but brief dry periods are tolerated. Adjust frequency based on season — less in winter, more in summer.
How much light does Horse Mint need?▼
Horse Mint prefers direct sun conditions. Needs several hours of unfiltered sunlight daily. South-facing windowsill or sunroom is ideal.
How big does Horse Mint get?▼
Indoors, Horse Mint typically reaches about 19 inches (48 cm) tall with a spread of around 11 inches. Growth rate is fast. Size depends on pot size, light, and care.
Is Horse Mint good for beginners?▼
Yes! With a difficulty rating of 2/5, Horse Mint is very forgiving and suitable for beginners. It tolerates imperfect conditions and bounces back from mistakes.
Similar Plants You Might Like
Ajuga
Ajuga reptans
Apple Mint
Mentha suaveolens
Breckland Thyme
Thymus serpyllum
Common Hemp-Nettle
Galeopsis tetrahit