Cotton Ball is a companion to Cotton Candy, with the same tall, sturdy, columnar form but clear white flowers. Wispy white sprays sit on dark stems, a crisp contrast that looks especially good in the evening garden.
The dense pillar of fine-textured leaves adds height to narrow spaces, and the long stems and lasting flowers make it an excellent cut flower. Deer and rabbits usually leave it alone.
What it looks like
Airy, rounded clusters of tiny flowers made of fluffy, thread-like stamens in clear white, forming cotton-like puffs 3 to 5 inches across on dark purple-black stems. The flowers sit just above the foliage. Leaves are finely divided with small, rounded, lobed leaflets in medium green, densely covering the stems. The plant is a narrow, columnar pillar 38 to 42 inches tall and 18 to 24 inches wide. At peak it looks like a tall green column capped with white puffs on dark stems.
Growing it with lavender
Meadow rue prefers richer, more evenly moist soil than lavender, so plant it in a nearby border with some afternoon shade, where its airy flower sprays can rise behind lower plants.
Care
Grow in full sun to part shade in average to fertile soil that stays reasonably moist; afternoon shade helps in hot, dry spots. Hardy in zones 5-8; cut the flowering stems back after bloom if the plant looks tired, and leave it undisturbed once established.
At a glance
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Botanical name: Thalictrum
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Flower color: Clear white
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Foliage: Medium green
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Growth habit: Narrow, columnar pillar
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Mature size: 38–42 in tall × 18–24 in wide
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USDA hardiness zones: 5–8
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Light: full sun, part sun to part shade
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Bloom start: Early-June
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Peak bloom: Late-June
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Bloom pattern: Long Blooming
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Deer resistance: Resistant
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Pollinator value: Good
Sizes and shipping
One full 20-cell plug tray: 20 large, field-ready plugs of this variety (cells about 2¾ in. wide × 3¼ in. deep or deeper), ready to plant out or pot up. 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.