Mondo Grass
Ophiopogon japonicus
Family: Asparagaceae
Mondo Grass (Ophiopogon japonicus) is an evergreen, grass-like perennial that works beautifully as ground cover or border edging. Despite its name, it's not a true grass but belongs to the lily family.
Complete Care Guide
Light Requirements
Thrives near east-facing windows or a few feet back from south/west windows. Needs consistent but not intense light.
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 5 days (adjust for season and environment).
Humidity
Average household humidity (40-50%) is usually fine. Misting occasionally or grouping with other plants can help during dry winter months.
Temperature
Keep between 50–85°F (10–29°C). Avoid cold drafts, heating vents, and sudden temperature changes. This plant tolerates cooler temperatures better than most.
Size & Growth
Mature size: approximately 8 inches tall × 12 inches wide. Growth rate is slow. Habit: bushy. Stays compact enough for desks and shelves.
Difficulty Level: 1/5
One of the easiest plants you can grow. Tolerates neglect, irregular watering, and imperfect conditions. Perfect for complete beginners and forgetful plant parents.
Quick Tips
- ✓Thrives in shade to partial sun
- ✓Keep soil consistently moist but not soggy
- ✓Divide clumps every 3-4 years
- ✓Evergreen in mild climates
- ✓Produces small lilac flowers and blue berries
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.
Scorched or bleached leaves
Cause: Too much direct sunlight burning the foliage
Fix: Move away from direct sun. This plant prefers filtered or indirect light.
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
Mondo Grass is non-toxic and safe for households with cats and dogs. Verified against the ASPCA Toxic and Non-Toxic Plant Database.
Best For
Frequently Asked Questions
Is Mondo Grass safe for cats and dogs?▼
Yes! Mondo Grass is non-toxic to both cats and dogs according to the ASPCA. Safe to keep in homes with pets.
How often should I water Mondo Grass?▼
Water approximately every 5 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 Mondo Grass need?▼
Mondo Grass prefers medium light conditions. Thrives near east-facing windows or a few feet back from south/west windows. Needs consistent but not intense light.
How big does Mondo Grass get?▼
Indoors, Mondo Grass typically reaches about 8 inches (20 cm) tall with a spread of around 12 inches. Growth rate is slow. Size depends on pot size, light, and care.
Is Mondo Grass good for beginners?▼
Yes! With a difficulty rating of 1/5, Mondo Grass is very forgiving and suitable for beginners. It tolerates imperfect conditions and bounces back from mistakes.
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