Calico Aster is a fall powerhouse that transforms late-season gardens into a pollinator haven just when it matters most. This strongly branched native variety grows 12 to 48 inches tall and rewards gardeners with showy blooms from September through October, each flower sporting classic thin white petals with reddish or purplish centers. Hardy in zones 3 through 3, it thrives in full sun with moderate water and low maintenance, blooming reliably 180 to 365 days after planting. The Pollinatehv Local Ecotype represents a locally adapted strain selected specifically to support native pollinators during their critical pre-winter feeding period.
Full Sun
Moderate
4-8
36in H x 36in W
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Low
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In late summer and fall, when the garden is winding down, Calico Aster erupts into action. Each plant becomes densely packed with spikey, branching stems crowned in hundreds of small flowers, creating a snow-like display of white petals offset by warm reddish or purplish centers. Butterflies and other pollinators flock to it as a crucial food source ahead of winter, making it far more than just ornamental. This local ecotype performs reliably in cold climates and asks almost nothing in return: full sun, moderate water, and the patience to let it do what it has done for generations.
Calico Aster serves a dual purpose in the garden as both a showy fall ornamental and a vital nectar source for butterflies and native pollinators preparing for winter. The flowers are edible and can be used in late-season floral arrangements to extend the garden's color into autumn. Beyond its aesthetic role, this variety functions as a keystone plant in pollinator conservation, supporting at-risk native bee and butterfly populations during the critical months before dormancy.
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Start seeds indoors 6 to 8 weeks before your last spring frost. Maintain soil temperatures between 60 and 75 degrees Fahrenheit for germination. Keep soil consistently moist but not waterlogged during the seedling stage.
Harden off seedlings gradually over 7 to 10 days before transplanting outdoors after the last frost has passed. Space plants 1 inch apart with rows 3 inches apart, in full sun with soil pH between 6.0 and 7.0.
Direct sow seeds outdoors after the last spring frost, pressing them lightly into soil at the surface or just beneath. Keep soil consistently moist until germination and establishment.
Cut flower stems when the blooms are fully open and the petals have unfurled. For pollinator support, allow some flowers to remain on the plant throughout September and October so insects can feed on nectar and pollen. If harvesting for arrangements, cut in the morning after dew has dried, using clean, sharp shears.
Deadhead spent flowers throughout the blooming season to encourage continued flowering and a bushier plant shape. In early summer, you can pinch back the growing tips to promote denser, more heavily branched plants with fuller flower production by fall.
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