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Isotoma fluviatilis (Blue Star Creeper)

Blue Star Creeper, Laurentia, Swamp Isotome, Laurentia fluviatilis, Lobelia fluviatilis, Rapuntium fluviatilis, Solenopsis fluviatilis

Blue Star Creeper, Isotoma fluviatilis, Laurentia, Swamp Isotome, Laurentia fluviatilisLobelia fluviatilis, Rapuntium fluviatilis
Blue Star Creeper, Isotoma fluviatilis, Laurentia, Swamp Isotome, Laurentia fluviatilisLobelia fluviatilisRapuntium fluviatilis

Isotoma fluviatilis, also known as Blue Star Creeper, is a charming, low-growing perennial plant. It’s prized for its lush, mat-forming habit and dainty star-shaped flowers.

Isotoma fluviatilis: An In-depth Look

Native: This species is native to Australia, thriving in damp environments like stream banks and wetlands.

Plant Type and Habit: It is an evergreen herbaceous perennial and ground cover, forming dense mats of tiny, green foliage.

Size: The plant typically grows to about 2-3 inches in height (5-7 cm) and can spread extensively, up to 24 inches (60 cm) or more.

Flowers: Blue Star Creeper boasts delicate, white or pale blue flowers that are star-shaped, each with five petals. The blooms are small but prolific.

Bloom Time: It flowers profusely in spring and summer.

Foliage: Its evergreen foliage consists of tiny, bright green leaves, 1/2 inch in length (1 cm), that provide a lush carpet-like appearance throughout the year.

Uses: Blue Star Creeper is commonly used as a ground cover in garden borders, rockeries, and along pathways. It’s also ideal for filling spaces between stepping stones and in fairy gardens.

Hardiness: It is hardy in USDA zones 6-8, tolerating a range of temperate climates.

Pollinators: The flowers attract bees and other pollinating insects, benefiting the garden ecosystem.

Toxicity: Blue Star Creeper is harmful if ingested and can cause skin irritation. It’s advisable to wear gloves while handling the plant and to wash your hands thoroughly after working with it.

Deer and Rabbit: This plant is generally not a first choice for deer and rabbits, but they may nibble on it if other food sources are scarce.

Drought: While it prefers moist conditions, it can tolerate short periods of drought once established.

Invasiveness: In ideal growing conditions, Blue Star Creeper can spread vigorously but is not typically considered invasive.

Benefits: Its fast-growing, mat-forming nature makes it excellent for erosion control. It also helps in suppressing weeds due to its dense foliage.

Blue Star Creeper Growing Tips

Light: Thrives in full sun to partial shade. Tolerates more sun in cooler climates and prefers some shade in hotter areas.

Soil: Prefers moist, well-drained soil. Tolerates a variety of soil types, from sandy to loamy.

Water: Keep the soil consistently moist but not waterlogged. More frequent watering may be needed in full sun or hotter climates.

Fertilizer: Apply a balanced, all-purpose fertilizer in spring. Over-fertilizing can encourage more foliage growth at the expense of flowers.

Pruning: Trim back as needed to control growth and encourage denser foliage.

Propagation: Easily propagated by division in spring or fall. It can also be grown from seed or by rooting stem cuttings.

Pests and Diseases: Generally pest-free, but watch for slugs and snails. Susceptible to root rot in overly wet conditions.

Requirements

Hardiness 6 - 8
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Campanulaceae
Common names Blue Star Creeper
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 2" - 3"
(5cm - 8cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 12" - 36"
(30cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Native Plants Australia
Attracts Bees
Garden Uses Ground Covers, Underplanting Roses And Shrubs
Garden Styles Informal and Cottage, Gravel and Rock Garden
How Many Plants
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Recommended Companion Plants

Hosta (Plantain Lily)
Astilbe
Heuchera (Coral Bells)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 6 - 8
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Campanulaceae
Common names Blue Star Creeper
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 2" - 3"
(5cm - 8cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 12" - 36"
(30cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Native Plants Australia
Attracts Bees
Garden Uses Ground Covers, Underplanting Roses And Shrubs
Garden Styles Informal and Cottage, Gravel and Rock Garden
How Many Plants
Do I Need?

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