PlantFun
Plant Needs
Sunlight
Partial sun to full sun; tolerates light shade; avoid intense midday sun in hot climates
Watering
Keep soil consistently moist but not waterlogged; avoid allowing the root ball to dry out completely
Temperature
Hardy to -15°C; thrives in cool temperate conditions; avoid prolonged temperatures above 32°C
Characteristics
- Leaf: Opposite, ovate to lanceolate leaves with serrated margins; bright green, aromatic when crushed
- Flower: Dense whorls of tiny pale purple or white flowers in leaf axils
- Stem: Square, hairy stems; spreads via underground rhizomes
Care Guide
Watering
Keep soil evenly moist; water when the top 1 cm of soil feels dry
Fertilization
Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent leggy growth
Composted eggshell powder：Crush fully dried eggshells into fine powder; mix a small amount into topsoil to boost calcium levels for healthy foliagePruning
- Trim back spent flower heads to encourage continuous foliage growth
- Thin overcrowded stems to improve air circulation and reduce disease risk
- Cut back to 5 cm above soil level in late autumn to promote vigorous spring regrowth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no known adverse effects
Humans: Non-toxic to humans; safe for culinary use in moderation
Garden Uses & Culture
Culture: Symbolizes hospitality in European folklore; used in traditional herbal remedies for digestive discomfort
Usage: Culinary herb for teas, salads, and garnishes; natural pest repellent for garden plants
