Cat's Breeches, Ballhead waterleaf, Alpine waterleaf, Thompson's waterleaf
Hydrophyllum capitatum
Family: Hydrophyllaceae
What it is like
Hydrophyllum capitatum is a PERENNIAL growing to 0.5 m (1ft 8in). See above for USDA hardiness. It is hardy to UK zone 5. The species is hermaphrodite (has both male and female organs). Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland). It prefers moist soil.
Height (m): 0.5
Where it is found
Rich moist soils, most often in the shade, from valleys to around 2,700 metres.
Western N. America - Alberta to British Columbia, south to Oregon and Colorado.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 3
Tender young shoots - cooked as a potherb. Root - cooked. Large and fleshy.
Root: includes bulbs, corms, tubers, rhizomes etc.
Medicine
Rating: 0
Other
Rating:
How it is grown
Requires a moist humus-rich soil in semi-shade. Grows well in an open woodland garden. The leaves are shaped in such a way that they collect rainwater in a cavity. Slugs are particularly fond of this plant and will soon destroy it if given a chance.
Propagating it: Seed - best sown as soon as it is ripe in a cold frame. The seed usually germinates in early spring. Sow stored seed as early in the year as possible. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Division in spring or autumn. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.
Best place to grow: Woodland Garden Dappled Shade; Shady Edge;
Habit: Perennial
Hardiness: 4-8
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: Semi-shade
Moisture: Moist