| Common Name | Astrantia, Masterwort |
| Genus | Astrantia |
| Species | various |
| Family | Apiaceae |
| Life Cycle | herbaceous perennial |
| Tray Size | TBD |
| Plug Care | Bump up into larger pots or plant out soon after arrival - do not allow to dry out or become rootbound while in the plug stage. These plugs are from tissue culture and will be completely hardened off to greenhouse conditions - harden off for 2-3 days to full sun and outdoor conditions before planting into the field. |
| Netting / Staking | Not necessary |
| Temperature Range | Hardy to -4F, possibly colder. Performs best in cool summer climates - needs some shade in extremely hot areas. |
| Spacing | 12" x 12" |
| Soil Preference | Moist, well drained. Struggles in excessively wet or dry soils. Water frequently especially in hot, sunny areas. |
| Day Length | Long-day plants. Prefer full sun to partial shade. Will not flower well in deep shade. |
| Pinching | Not necessary |
| When to Plant | Plant in the spring after the threat of frost has passed. |
| Harvesting | Harvest when buds are just beginning to open. The Kolster varieties we carry are high yielding. Expect the following stem counts per square meter: year 1 = 90 stems, year 2+ = 150 stems. |
| Post Harvest Care | Expect a vase life of up to two weeks. Store at 34-38F. Ethylene sensitive. |
| Diseases / Insects | No major pests or diseases to note. Can suffer from typical plant pests like slugs and aphids. |
| Bailey's Notes |
Astrantia is a must-grow for flower farmers seeking delicate yet distinctive blooms that elevate any arrangement. Its unique, star-shaped flowers - featuring tiny florets surrounded by papery bracts - come in elegant shades of blush, burgundy, and white, making it perfect for everything from rustic bouquets to high-end floral designs. Highly valued for its versatility, astrantia offers long-lasting beauty both fresh and dried, with blooms that hold their form and charm over time. It’s a reliable perennial, thriving in cooler climates and partial shade, and once established, it provides a steady supply of stems throughout the growing season. It's best to deadhead Astrantias to keep them flowering. Remove any faded blooms and do not allow plant to set seed - this will prolong the flowering window. The height can vary depending on variety: Magical Diamonds 28" - 32" Sparkling 23" - 28" |
| Resources | N/A |
