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Scientific Name: Stokesia laevis (Hill) Greene
Synonym: Carthamus laevis
Recommended Temperature Zone:|
Frost Tolerance: Survive with protection in USDA zones 5 and 6
Heat Tolerance: In the hottest areas, it does better with some shade in early afternoon when the sun is hottest.
Sun Exposure: Full sun
Origin: Southeastern USA
Growth Habits: Evergreen to semi-evergreen herbaceous perennial, 16 to 24 inches tall and wide (45-60 cm); medium green basal leaves, sometimes toothed, 6 to 8 inches long (15-20 cm)
Watering Needs: Regular water, needs good drainage and acidic soils
Propagation: Division, stratified seeds, easy to transplant
- 'Alba': white flowerheads.
- 'Blue Danube': lavender flowerheads, 4 to 5 inches in diameter (10-12 cm).
- 'Blue Moon': deep blue flowerheads.
- 'Bluestone': a dwarf cultivar, up to 10 inches tall (25 cm).
- 'Klaus Jelitto': Large, pale blue flowers
- 'Mary Gregory': creamy yellow flowerheads, 12 inches tall (30 cm).
- 'Omega Skyrocket': large variety, 3 to 4 feet tall (0.9-1.2 m) with long-stemmed white to pale blue flowers, 4 inches in diameter (10 cm), less cold resistant than the other varieties.
- 'Purple Parasols': deep violet purple flowers.
- 'Rosea': rosy-pink flowerheads.
- 'Silver Moon': silvery-white flowerheads, up to 4 inches in diameter (10 cm).
- 'Wyoming': dark blue flowerheads, 4 inches in diameter (10 cm).
When the conditions are favorable the Stokes' aster tends to spread and sometimes become invasive.
Shaggy cornflower-like pink or blue flowerheads, 3 to 4 inches in diameter (7.5-10 cm), in late summer and autumn.
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