PlantFun
Plant Needs
Characteristics
- Leaf: Opposite, ovate to lanceolate leaves with serrated margins and stinging trichomes on undersides and stems
- Flower: Tiny greenish unisexual flowers arranged in dense axillary clusters
- Stem: Erect, quadrangular, covered in hollow stinging hairs that inject irritant sap when broken
Care Guide
Keep soil evenly moist; water when the top 1 cm of soil feels dry
Diluted organic feed once every 2 weeks. Use low-nitrogen organic feed to promote healthy foliage without excessive growth
Banana peel compost tea：Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 with water for root drench; avoid using raw peels to prevent pest infestations- Trim back overgrown stems in early spring to encourage bushier growth and increase leaf production
- Remove wilted or yellowing foliage to improve airflow and reduce mold risk
- Cut back the entire plant after flowering to collect seeds or allow self-seeding for next year’s growth
Toxicity
Warning: this plant may be toxic.
Pets: ASPCA: Contact with stinging hairs causes skin redness and itching; ingestion may lead to mild vomiting or diarrhea
Humans: Stinging hairs inject histamine and acetylcholine, causing immediate local pain, redness, and swelling; ingestion of raw leaves may cause mild gastrointestinal irritation
Garden Uses & Culture
Culture: Historically symbolized protection; used in traditional European medicine to treat allergies and inflammation
Usage: Young leaves are edible when cooked to neutralize stinging hairs; medicinal herb for topical and oral use; provides forage for butterfly larvae
