PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in hot, dry conditions; tolerates light afternoon shade in extreme heat
Watering
Allow soil to dry completely between waterings; highly drought tolerant once established
Temperature
Hardy to light frosts (down to 5°C); prefers warm, Mediterranean-style climates
Characteristics
- Leaf: Basal rosette of hairy, ovate to lanceolate leaves with crenate margins; stem leaves smaller and narrower
- Flower: Spikes of tubular purple-blue two-lipped flowers, clustered in dense whorls
- Stem: Square, hairy stems characteristic of the mint family
Care Guide
Watering
Water deeply once per week during prolonged dry spells; avoid frequent shallow watering
Fertilization
Light application of balanced organic fertilizer once at start of growing season. Avoid high-nitrogen fertilizers to prevent leggy, weak growth
Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle lightly on soil surface and gently work into top 2 cm; helps prevent blossom end rot in flowering stemsPruning
- Deadhead spent flower spikes promptly to encourage prolonged blooming through early summer
- Cut back stems to basal rosette after flowering to promote fresh foliage growth for the next season
- Thin crowded clumps in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats
Humans: Non-toxic to humans; edible leaves have mild sage-like flavor
Garden Uses & Culture
Culture: Associated with purification and healing in traditional European herbal practices
Usage: Ornamental wildflower; leaves can be used to make mild herbal tea with sage-like flavor
