Collin County Master Gardeners
The Texas A&M AgriLife Extension Service, Collin County
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Fall Aster
Fall Aster, Aromatic Aster, Aromatic American Aster, Wild Blue Aster, Shale Aster
(
Symphyotrichum oblongifolium; aster oblongifolium
)
Master Gardener Notes
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Blooms October to November. Fall aster creates dazzling purple mounds in the fall season. It slowly colonizes by stolons, so thin regularly to control it. The plant may open up if it gets to top heavy so it is a good idea to keep it thick by pruning it back by no more than half in June. After it goes dormant, wait to cut back to the basal rosette in late fall, early winter.
Category:
Shrub,Seasonal Color
Life Cycle:
perennial
Foliage:
deciduous
Flower Color:
Lavender-blue
Friut Bearing?
No
Fragrant?
Yes
Water Needs:
low
Sun Exposture:
Full Sun,Partial Sun
Size and Spacing:
3’ tall x 3’ wide
Best Time to Plant:
Spring,Fall
Pests or Problems:
No serious insect or disease problems. Some susceptibility to mildew
Propagation:
Stem Cutting
Special Interest:
Bees,Butterflies
Related Links:
Lady Bird Johnson Wildflower Center
Missouri Botanical Garden