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Photo by Stan Shebs

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Isotoma axillaris

Also Known As

Isotoma axillaris 'Blue Star'
Laurentia axillaris
Laurentia axillaris 'Blue Stars'
Solenopsis axillaris
Blue Star Creeper
Laurentia
Rock Isotomes
Star Flower

Plant type

perennial

size

H: 6"-12"
W: 6"-18"

planting zones

9a-10b

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Isotoma axillaris plant details

Isotoma axillaris is a broadleaf semi-evergreen perennial with green foliage. In fall and summer blue and lavender flowers emerge. Grows well with sun - mostly shade and regular - low water. Does well in rich and well-drained soil.

CHARACTERISTICS OF Isotoma axillaris

Plant type: perennial
Plant family: campanulaceae
Foliage: semi-evergreen green
Mature size: 6 IN - 18 IN - wide, 6 IN - 12 IN - tall
Flowers: blue and lavender blooms in fall and summer
Uses: self-sowing

GROWING CONDITIONS for Isotoma axillaris

USDA Zones: 9a - 10b
Sun exposure: sun - mostly shade
Watering frequency: regular - low

Soil needs: rich and well-drained

Nursery contributed plant descriptions

When this plant comes into bloom at our nursery it becomes sold out almost immediately. Masses of 1" blue tubular stars dance above finely cut green foliage on sprawling 8-10" plants.

By: Avant Gardens

I love to plant frothy long-blooming ‘Blue Stars’ in Spring so it will keep the edges of my bed pretty after the Spring bloomers have faded. Lovely, lavender blue stars burst out from top to bottom like fireworks atop pretty green ferny foliage. As it expands, it’ll spill over and soften the edge of a path or rock wall. Flowers last almost 2 months, then cut back for a second go-round. Can be planted in Summer for Fall bloom and in Fall for Spring. 12”x12”. Rich soil. Self-sows! Sun/Pt. sun. Avg. water. Short-lived perennial USDA zones 9-10, annual elsewhere.