FoliageBlue Star Creeper
Isotoma fluviatilis
Blue Star Creeper (Isotoma fluviatilis) is a fast-growing perennial, hardy in USDA zones 5-9, that matures to about 2-3 in × 1-2 ft. It does best in full sun and part shade with medium water needs in moist and well-drained soil. Expect blue blooms in spring and summer.
- USDA zones
- 5-9
- Sun
- Full sun, Part shade
- Water
- Medium
- Mature size
- 2-3 in × 1-2 ft
- Spacing
- 9-12 in
- Growth rate
- Fast
- Maintenance
- Low
- Soil
- Moist, Well-drained
- Foliage
- Green
- Bloom color
- Blue
- Bloom season
- Spring, Summer
- Native to
- Australia
In the landscape
Data sources
Freeze survival
Will it survive your winters?
Hardiness zones show a normal bad winter. We check the worst one — Blue Star Creeper is hardy to about -20°F (estimated from USDA zone 5), so we'll score it against the real coldest nights your area has actually had.
Powered by ~35 years of daily lows from the nearest NOAA weather station. A risk read, not a guarantee — a sheltered spot or mature plant beats the odds.
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