Spearmint
Mentha spicata
A fragrant and hardy perennial herb known for its bright green, serrated leaves and refreshing aroma. Spearmint is a staple in culinary gardens and indoor pots, offering a sweeter and more subtle flavor than peppermint. It is widely used in teas, cocktails, and Mediterranean cuisine.
Light
Full Sun
Water
High
Difficulty
Easy
Humidity
Moderate
Pet Warning
Spearmint contains essential oils that are toxic to dogs, cats, and horses. Ingestion can lead to vomiting, diarrhea, and gastrointestinal distress.
Care Guide
Care Guide for Spearmint
Light: Spearmint thrives in bright light. Place it near a south-facing window or under grow lights for best results. It can handle partial shade but may become leggy and lose its aromatic potency.
Watering: This plant loves moisture. Keep the soil consistently moist to the touch. Do not allow the soil to dry out completely, but ensure the pot has drainage holes to prevent waterlogged roots.
Temperature and Humidity: It prefers moderate temperatures between 55-75°F (13-24°C). Standard household humidity is usually sufficient, but it appreciates a boost from a humidifier or pebble tray in drier winter months.
Pruning and Maintenance: Frequent harvesting or pinching back the stems is essential to maintain a compact, bushy shape. Pinch off any flower spikes to keep the plant's energy focused on leaf production, as flowering can make the foliage taste bitter.
Pests: Keep an eye out for spider mites or aphids. If found, treat the plant with organic neem oil or insecticidal soap, especially if you intend to consume the leaves.
In-Depth Care & Growth
Feeding & Soil
Fertilizer
Balanced liquid 10-10-10 fertilizer
Soil
Rich, moist, well-draining potting mix with a pH between 6.0 and 7.5.
Physical Attributes
Mature Size
12 to 24 inches
Growth Rate
Fast
Propagation
Stem cuttings in water, root division, or transplanting runners (rhizomes).