PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in open meadow conditions with unobstructed sunlight
Watering
Water moderately, tolerate short dry periods; avoid waterlogging which can rot shallow roots
Temperature
Hardy to -15°C; prefers cool temperate conditions and tolerates mild summer heat
Characteristics
- Leaf: Opposite, lanceolate to ovate, serrated margins, pale green
- Flower: Bright yellow, bilabiate corolla, inflated calyx that rattles when mature
- Stem: Erect, branched, slightly hairy
Care Guide
Watering
Keep soil slightly moist during active growth periods
Fertilization
No fertilization needed; low-fertility soil supports natural growth. Avoid high-nitrogen fertilizers which can favor competing grasses
Eggshell powder topdress：Sprinkle a thin layer of crushed, dried eggshells on soil surface to add calcium without increasing soil fertilityPruning
- Deadhead spent flowers to limit excessive self-seeding if meadow management is needed
- Remove dried stems after flowering to maintain meadow tidiness
- Avoid heavy pruning as the plant has a short annual lifecycle
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No listed toxicity to cats
Humans: No known toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Used in wildflower meadow restoration to suppress dominant grasses and promote biodiversity
