Botanical Name: Isotoma fluviatilis

Common Name: Blue Star Creeper

Hardiness Zone: Perennial in Most Climates (USDA Zones 5–9)

Size: 1–3" Tall × 12–24" Spread

Growth Habit: Very Low-Growing, Spreading Ground Cover

Sunlight: Full Sun to Partial Shade

Soil: Prefers Moist, Well-Drained Soil; Adapts to Average Garden Soils

Water Needs: Moderate; Consistent Moisture Encourages Faster Fill-In

Bloom Season: Late Spring through Summer

Fertilizer: Minimal; Avoid Excess Fertility

Features: Tiny Star-Shaped Blue Flowers, Fine Textured Evergreen Foliage, Light Foot Traffic Tolerant

Uses: Ideal for Ground Cover, Between Stepping Stones, Pathways, Rock Gardens, and Edging

Patent: ❌ Not Patented

Propagation: ✔ Propagation Allowed

See our complete Blue Star Creeper Plant Guide for more in depth care details.

More About Blue Star Creeper

Blue Star Creeper is a charming, low-growing ground cover prized for its delicate texture and carpet of tiny, star-shaped blue flowers. Blooming from late spring into summer, the flowers create a soft haze of color just above the foliage, making it especially attractive in close-up garden areas like pathways and patio edges.

The foliage forms a dense, mat-like cover that stays low and tidy, helping suppress weeds while softening hardscape features. In mild climates, Blue Star Creeper remains evergreen, providing year-round interest even when not in bloom.

Why We Like It (Our Trials)

In our trials, Blue Star Creeper has proven to be an excellent choice for areas where a subtle, refined ground cover is needed. It spreads steadily without becoming aggressively invasive and tolerates light foot traffic once established, making it ideal for planting between stepping stones or along walkways.

We also appreciate its adaptability. It performs well in full sun to partial shade, handles moderate moisture, and pairs beautifully with spring bulbs, creeping thyme, and other low-growing plants. Deer generally leave it alone, and maintenance is minimal once it fills in.