Horehound
Marrubium vulgare
Family: Lamiaceae
Horehound (Marrubium vulgare) 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 4 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 34 inches tall × 18 inches wide. Growth rate is slow. 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
Horehound 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 Horehound safe for cats and dogs?▼
Yes! Horehound is non-toxic to both cats and dogs according to the ASPCA. Safe to keep in homes with pets.
How often should I water Horehound?▼
Water approximately every 4 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 Horehound need?▼
Horehound prefers direct sun conditions. Needs several hours of unfiltered sunlight daily. South-facing windowsill or sunroom is ideal.
How big does Horehound get?▼
Indoors, Horehound typically reaches about 34 inches (86 cm) tall with a spread of around 18 inches. Growth rate is slow. Size depends on pot size, light, and care.
Is Horehound good for beginners?▼
Yes! With a difficulty rating of 2/5, Horehound is very forgiving and suitable for beginners. It tolerates imperfect conditions and bounces back from mistakes.
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