Blue Ice Amsonia is a compact cultivar of Amsonia tabernaemontana that brings delicate spring-to-summer color to northern gardens, thriving in hardiness zones 4 and beyond. This frost-hardy perennial grows just 12 to 18 inches tall but spreads to a full 24 inches wide, creating a low, mounding presence perfect for front borders or rocky slopes. Its soft blue flowers bloom reliably from March through August, attracting pollinators while standing resolute against deer pressure. With moderate water needs and an adaptable nature across a broad soil pH range (5.5 to 7.5), Blue Ice Amsonia rewards gardeners with minimal fuss and maximum seasonal interest.
1
Full Sun
Moderate
4-4
18in H x 24in W
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Moderate
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Blue Ice Amsonia's compact stature and extended bloom window set it apart from larger amsonia varieties, delivering color for nearly six months without sprawling across the garden. The combination of deer resistance, pollinator magnetism, and genuine cold hardiness into zone 4 makes this a workhorse for northern gardeners who want elegance without babying. Full sun exposure brings out the richness of its blue flowers, and it asks for nothing more than moderate water and decent soil to flourish year after year.
Blue Ice Amsonia functions as an ornamental perennial, valued for its role in spring and early-summer garden color. It serves well in borders, rock gardens, and native plant landscapes where its modest height and pollinator appeal contribute to the overall design and ecological function of the space.
No timeline data available yet for this variety.
Germinate seeds indoors at 60 to 75 degrees Fahrenheit. Start seeds 6 to 8 weeks before your last spring frost to allow adequate growth before transplanting outdoors.
Harden off seedlings gradually over 7 to 10 days before moving them outside. Space plants 24 inches apart to accommodate their mature width. Transplant after the danger of frost has passed and soil has warmed slightly.
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