PlantFun
Plant Needs
Sunlight
Prefers full sun to partial shade; tolerates dry, exposed growing conditions
Watering
Drought-tolerant; water only when the top 5–7 cm of soil is completely dry to avoid overwatering
Temperature
Hardy to light frosts (down to 0°C); thrives in temperate to warm summer climates
Characteristics
- Leaf: Pinnately compound, fern-like leaves with finely divided, bright green segments
- Flower: Tiny white, five-petaled flowers arranged in dense, rounded umbel clusters
- Stem: Slender, hairy stems with distinct swollen nodes that give the plant its common name
Care Guide
Watering
Water sparingly during extended dry spells to support flowering
Fertilization
No regular fertilization required. Excess nutrients may reduce flowering and encourage leggy growth
Eggshell powder topdressing：Sprinkle finely ground, dried eggshells around the base of plants to improve soil drainage and add trace calcium; avoid applying directly to foliagePruning
- Deadhead spent flower heads to prevent unwanted self-seeding in managed garden spaces
- Remove yellowing or damaged foliage to improve airflow and reduce pest attraction
- Cut back entire plant to ground level after seeding in late summer to tidy the planting area
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: Mild gastrointestinal upset including vomiting or diarrhea if ingested; no official ASPCA listing
Humans: Mild gastrointestinal irritation may occur if large quantities of foliage or seeds are ingested
Garden Uses & Culture
Culture: N/A
Usage: Occasionally used as a wild foraged herb in small quantities; primarily grown as a decorative wildflower
