Matsumoto Blue Aster is a semi-double flowered aster with striking blue petals and bright yellow centers that reaches 26 inches tall. Bred from Callistephus chinensis, this heirloom variety produces 2-inch blooms that mature in 90 days and thrives in full sun. It's a garden standout that works equally well in containers on the patio, in flower beds, or as cut flowers for arrangements.
Full Sun
Moderate
2-11
?in H x ?in W
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Moderate
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The blazing blue petals with contrasting yellow centers create an almost luminous quality in the garden. At 26 inches tall with semi-double blooms that reach 2 inches across, this aster has real presence without overwhelming smaller garden spaces. The semi-double form, with its layered petals, gives far more visual depth than single-flowered varieties, and it germinates quickly, sprouting in just 10-14 days under the right conditions.
Matsumoto Blue Aster is grown primarily for fresh cut flowers and garden display. Its sturdy 26-inch stems and semi-double blooms make it excellent for bouquets and floral arrangements, while its compact enough to work in containers on patios or integrated into mixed flower beds and borders.
No timeline data available yet for this variety.
Start seeds indoors several weeks before your last spring frost. Sow at a soil temperature of 70-85 degrees Fahrenheit and keep soil consistently moist until germination, which occurs in 10-14 days. Grow transplants under bright light until they're ready to move outdoors.
Transplant outdoors after your last spring frost when soil has warmed and plants have developed several sets of true leaves. Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days before planting.
You can sow seed directly in place in spring once soil has warmed and frost danger has passed.
Cut flowers for arrangements once the semi-double blooms are fully open, typically around 90 days from sowing. Cut stems in the early morning when flower buds are turgid with water. Cut at an angle about one-third of the way down the stem to encourage longer stem length for arrangements.
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