Boraginaceae
Hydrophyllum capitatum var. thompsonii
Hydrophyllum capitatum var. thompsonii var. thompsonii
Also known as Hydrophyllum thompsonii
Flowering Plants · Native Plants · Native Wildflower · Woodland · Shade Tolerant · Pacific Northwest · Perennial · Ground Cover · Hydrophyllum · Boraginaceae
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.
Growing conditions
The details behind the basics
- Daily light
- 3 hours
- Watering
- Water thoroughly to keep soil consistently moist but not waterlogged · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.4–7.8
- Temperature
- -40°F to 95°F
- Cycle
- Perennial
Hardiness
USDA 3a-9b
Form & growth
Mature size and habit
- Mature height
- 6 in – 18 in
- Spread
- 4 ft
- Spacing
- 12 in apart
- Growth rate
- Fast
- Root depth
- Medium
- Flowers
- Purple
- Foliage
- Green · Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Oregon, Washington
- Attracts
- Bees, Butterflies
Sources: trefle, usda
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