Plant Height: 24 inches
Flower Height: 3 feet
Spacing: 18 inches
Sunlight: 
Hardiness Zone: 3a
Other Names: Hattie's Pincushion
Ornamental Features
Great Masterwort features delicate cymes of white pincushion flowers with purple anthers at the ends of the stems from early to late summer. The flowers are excellent for cutting. Its deeply cut ferny palmate leaves remain dark green in color throughout the season. The fruit is not ornamentally significant.
Landscape Attributes
Great Masterwort is an open herbaceous perennial with an upright spreading habit of growth. Its relatively fine texture sets it apart from other garden plants with less refined foliage.
This plant will require occasional maintenance and upkeep, and should be cut back in late fall in preparation for winter. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;
- Self-Seeding
Great Masterwort is recommended for the following landscape applications;
- Mass Planting
- General Garden Use
- Bog Gardens
Planting & Growing
Great Masterwort will grow to be about 24 inches tall at maturity extending to 3 feet tall with the flowers, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 18 inches apart. It tends to be leggy, with a typical clearance of 1 foot from the ground, and should be underplanted with lower-growing perennials. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 15 years.
This plant does best in full sun to partial shade. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This species is not originally from North America. It can be propagated by division.
