Frosty Blue is a broad whale's tongue agave that forms a single rosette of short, wide, cupped leaves in a powdery gray-blue with a turquoise cast. It grows relatively quickly for an agave and is one of the most cold-hardy, tolerating temperatures down to about 5°F.
It reaches 2 to 3 feet tall and can spread to 6 feet, making a bold focal point. At the end of its long life, it sends up a tall spire of greenish yellow flowers, after which the rosette dies.
What it looks like
Short, very broad, cupped leaves shaped like a whale's tongue are a powdery gray-blue with a soft turquoise cast and a frosted finish. The margins carry small, evenly spaced teeth, and each leaf is tipped with a steel-gray spine. The leaves form a single, open, symmetrical rosette 2 to 3 feet tall and 3 to 6 feet wide. Faint leaf imprints decorate the surfaces, giving a sculptural look.
Growing it with lavender
Like lavender, it wants full sun and sharp drainage, so set it in a container on a gravel patio or among the lavender beds for summer, where its blue-gray rosette echoes lavender's foliage, then move it indoors for winter.
Care
Plant in full sun in lean, very fast-draining soil and keep it dry in winter. Hardy in zones 8 to 10. In the Great Lakes region, grow it in a pot of fast-draining cactus mix and bring it indoors to a bright, cool window before frost; water deeply only when the soil is completely dry.
At a glance
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Botanical name: Agave ovatifolia
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Flower color: Greenish yellow (once, after many years)
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Foliage: Powdery gray-blue with turquoise cast
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Growth habit: Single, broad rosette
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Mature size: 24–36 in tall × 36 in–6 ft wide
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USDA hardiness zones: 8–10
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Light: full sun
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Deer resistance: Resistant
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Pollinator value: Low
Sizes and shipping
One full 72-cell plug tray: 72 young starter plugs of this variety (cells about 1⅓ in. wide × 2½ in. deep), rooted and ready to pot up into quarts or gallons. Best for growers and nurseries. Potted plants and plug trays ship during our live-plant seasons, March 1–May 31 and October 1–November 30; June through September is local pickup only. Plugs, potted plants and trays do not ship to AZ, CA, HI, ID, NV, OR, UT or WA.
Shipping note: Tender succulent; can suffer cold damage in transit and rot if kept wet, so ship in warm weather and pot promptly in dry, fast-draining mix.