Amsonia 'String Theory' is a compact, refined version of the classic Blue Star. It features soft, thread-like foliage and stunning clusters of starry, periwinkle-blue flowers in late spring. This low-maintenance perennial adds graceful texture to sunny borders, cottage gardens, and pollinator-friendly landscapes. Its fall foliage turns a brilliant golden-yellow, making it a standout in every season. It's deer-resistant and drought-tolerant once established — perfect for gardeners seeking beauty with ease.
- Hardiness USDA Zones: 4–9
- Light: Full Sun to Partial Shade
- Mature Size: 18–22 inches tall × 28–32 inches wide
- Bloom Time: Late Spring to Early Summer
- Flower Color: Periwinkle Blue
- Foliage: Fine-textured, green; turns golden yellow in fall
- Pollinator Friendly: Attracts bees & butterflies
- Deer Resistant and Drought Tolerant
Note: Your plant ships potted and carefully packaged. It may enter dormancy in fall/winter and appear dry or leafless — this is normal. Growth resumes in spring. Due to agricultural regulations, we cannot ship certain sizes to California.
Frequently Asked Questions❓
Does Amsonia 'String Theory' need full sun?
It grows best in full sun but tolerates partial shade, especially in hot climates.
Will deer eat this plant?
Not likely! Amsonia is naturally deer-resistant due to its sap and texture.
When does it bloom?
It blooms in late spring to early summer with soft blue star-shaped flowers.
Does it provide fall color?
Yes! Its fine green leaves turn a bright golden-yellow in fall.
Can it be grown in containers?
Yes, its compact form makes it suitable for larger pots and raised beds.
Growing Zones: 4–9
| Mature Height: | 18–22 inches |
| Sunlight: | Full Sun to Part Shade |
| Mature Width: | 28–32 inches |
| Botanical Name: | Amsonia hubrichtii 'String Theory' |
| Growth Rate: | Moderate |
| Foliage: | Fine, thread-like green foliage |
| Plant Type: | Herbaceous Perennial |
| Product Type: | Low-Maintenance Pollinator Perennial |
