Ballhead Waterleaf (Hydrophyllum capitatum)

Ballhead Waterleaf

Hydrophyllum capitatum

Soft, cloud-like blooms nod gently in meadows. Herbaceous perennial wildflower; common name: Ballhead Waterleaf.

Partial sun
1–2/week
Beginner
🌱

Plant Needs

☀️
Sunlight Partial sun to full shade; thrives in dappled woodland light and avoids intense midday sun
💧
Watering Water regularly during dry spells; maintain moist but well-drained soil to prevent root rot
🌡️
Temperature Cold hardy to USDA zones 3–8; tolerates winter frost and cool spring temperatures
🔍

Characteristics

  • Leaf: Basal leaves are fuzzy, heart-shaped, and shallowly lobed; stem leaves are smaller and deeply divided
  • Flower: Dense spherical clusters of pale blue to lavender bell-shaped blooms with protruding stamens
  • Stem: Hairy, upright stems with branching near the top of the plant
🛠️

Care Guide

Watering

Keep soil consistently moist; apply mulch to retain soil moisture

Fertilization

Light top-dressing of compost once at emergence. Avoid synthetic fertilizers to support native pollinator health

Composted banana peel tea:Steep fully composted banana peels in water for 3 days, dilute 1:20 for root drench; discard solid peels to prevent pest attraction
Pruning
  • Deadhead spent flower clusters to encourage self-seeding and tidy growth
  • Cut back foliage to ground level after flowering to reduce overcrowding
  • Remove damaged or yellowing leaves throughout the growing season
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxicity to humans; safe for handling and consumption in small quantities

📖

Garden Uses & Culture

Culture: N/A

Usage: Native pollinator host plant for bees and butterflies; suitable for wildflower meadows