Suwannee Blue-eyed Grass
Sisyrinchium nashii 'Suwannee'
Essentials
At a Glance
Plant Type
Perennial
Height
12 inches
Width
8 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
A clumping perennial known for its attractive blue flowers and grass-like foliage. This cultivar is noted for its enhanced flower production and vibrant color compared to other species in the genus.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-drained soil in early spring for best germination.
- Mist cuttings lightly and keep in bright, indirect light for root development.
- Ensure soil remains moist but not waterlogged during growth.
- Transplant seedlings when they are 4 inches tall into their permanent spot.
- Fertilize with a balanced, water-soluble fertilizer every 4-6 weeks during active growth.
- Divide clumps in early spring or late fall to promote healthy growth.
Pro Tip
Use well-draining sandy soil and avoid overwatering to prevent root rot.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Provide full sun for optimal flowering
- Apply a balanced fertilizer during the growing season
- Divide clumps every 2-3 years to maintain vigor
- Mulch to retain soil moisture and suppress weeds
Don't
- Don’t let soil stay waterlogged ❌
- Avoid heavy clay soils that retain too much moisture
- Don’t over-fertilize, which can cause leggy growth
- Refrain from cutting back until after flowering
- Avoid planting in deep shade where it won’t bloom
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Suwannee Blue-eyed Grass questions
What zones can Suwannee Blue-eyed Grass grow in?
Suwannee Blue-eyed Grass is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Suwannee Blue-eyed Grass deer resistant?
Yes — Suwannee Blue-eyed Grass is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Suwannee Blue-eyed Grass bloom?
Suwannee Blue-eyed Grass typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Suwannee Blue-eyed Grass need full sun?
Suwannee Blue-eyed Grass does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Suwannee Blue-eyed Grass drought tolerant?
Yes — once established (usually after the first full season), Suwannee Blue-eyed Grass handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Sisyrinchium to compare
Lucerne Blue-eyed Grass
Sisyrinchium angustifolium 'Lucerne'
Western Blue-eyed Grass
Sisyrinchium bellum
Yellow Blue-eyed Grass
Sisyrinchium tinctorium 'Puerto Yellow'
Narrow-leaved Blue-eyed Grass
Sisyrinchium angustifolium
Devon Skies Blue-Eyed Grass
Sisyrinchium x hybrida 'Devon Skies'
Blue-eyed Grass
Sisyrinchium brachypus
Keep exploring
Explore the genus
Collections featuring this plant
Grow Suwannee Blue-eyed Grass with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
