Hydrophyllum capitatum var. thompsonii

Hydrophyllum capitatum var. thompsonii var. thompsonii

var. thompsonii

Hydrophyllum

Boraginaceae

Flowering Plants

Zone 3–9

🐾 Pet-Safe

Thompson's waterleaf is a shade-tolerant Pacific Northwest native that thrives in moist, humus-rich soil under partial canopy. Water regularly to maintain consistent soil moisture, especially during dry spells. It is best suited for woodland gardens or shaded native plant landscapes in Oregon and Washington.

Care Requirements

Care Level

Moderate

Sun

Partial Shade

Water

Moderate

Growth Rate

Fast

Mature Height

6″ – 18″

Soil

loam

Life Cycle

Perennial

Spacing

12″

Flowers

purple

Watering Schedule

Every 7-10 Days • Water Thoroughly To Keep Soil Consistently Moist But Not Waterlogged

Soil pH

6.4 – 7.8

Temperature

-40° – 95°F

Mature Spread

up to 48″

Root Depth

Medium

Foliage

Medium

Ecology & Origin

Native to

Oregon

Washington

Attracts

🐝 Bees

🐝 Butterflies

Sources

Data: trefle, usda

Hardiness Zones

Check your zone:

Available From (0)

No nurseries currently have this species in stock.