Overview
Ptilimnium capillaceum is a plant with a clump forming habit in the genus Ptilimnium, part of the Apiaceae family, with deciduous foliage. Ptilimnium capillaceum grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H5. Suggested uses include ornamental and ground cover.
About
Ptilimnium capillaceum, known by the common name of herbwilliam, is a member of the carrot family, Apiaceae. It is a perennial herb, native to the eastern United States, from Texas to Massachusetts.
About the genus
Ptilimnium is a group of plants in the family Apiaceae described as a genus in 1819. The common name is mock bishopweed or mock bishop's weed. It is endemic to the United States, primarily in the Southeast, the Lower Mississippi Valley, and the Lower Great Plains.
Wikipedia contributors, "Ptilimnium", CC BY-SA 4.0 — Ptilimnium
Growing conditions
Best soil and position for Ptilimnium
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
Ptilimnium capillaceum size, habit and characteristics
- Habit
- Clump forming
- Foliage
- Deciduous
- Suggested uses
- Ornamental, Ground cover
Care notes
Pruning and caring for Ptilimnium capillaceum
- Propagation
- Division, Seed
- Pest resistance
- Not specified
- Disease resistance
- Not specified
Frequently asked questions
Where is the best place to plant Ptilimnium capillaceum?
Ptilimnium capillaceum prefers full sun. It suits sheltered positions.
What soil does Ptilimnium capillaceum need?
Ptilimnium capillaceum grows best in loam soil. It prefers neutral soil. Aim for soil that stays well-drained.
Is Ptilimnium capillaceum hardy in the UK?
Ptilimnium capillaceum has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Ptilimnium capillaceum?
Division, Seed.
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