(Siberian Yarrow)

This subspecies of Achillea sibirica, a slender hardy perennial native to the Northern Hemisphere, makes an upright stem with distinctive lance-shaped leaves that have saw-tooted edges. The flowers have stubby white or pink petals and a prominent yellow center. They grow in a loose cluster at the top of the stem. Flowering runs through summer and into early fall.

This species prefers full or partial sun on well-drained moist soil. To make a notable show, group several plants together in a mixed...

(Love Parade Siberian Yarrow, Siberian Yarrow)

Delicate clusters of palest pink flowers blanket this tough perennial in early summer. In spring, the clump-forming 'Love Parade' sends up upright stems lined with glossy dark green leaves. Its long-lasting flowers are lavender pink when they first open and fade to a dirty white as they age. This hardy and resilient plant will continue to flower into early fall, if regularly deadheaded, and is attractive to butterflies.

Siberian yarrow is very easy to grow. Full to partial sun is required...

(Wooly Yarrow)

This Achillea species, also known as Wooly yarrow, is a small hardy perennial from southern Europe and western Asia with distinctive gray-green leaves that are lined with so many chubby leaflets that they look almost wooly. The leaves spread close to the ground in a thick, mussy mat from which flower stems rise, topped with a dense cluster of small yellow flowers. Bloom starts in early summer and continues to early fall.

Wooly yarrow has several uses:it can make a thick, flowering groundcover,...

(Golden Fleece Wooly Yarrow, Wooly Yarrow)

This yarrow cultivar is a mat-forming, hardy, herbaceous perennial with distinctive toothy, hairy leaves that look as if a spider had covered them with silk. The tousled mat of leaves is very low and the flower stems rise only a little higher. The flower custers are tightly made of many gold-yellow flowers with blunt petals and a promiment gold center. Flowering is profuse from early summer to early fall. The parent is wooly yarrow, a species native to southern Europe and western Asia.

Wooly...

(Goldie Yarrow, Wooly Yarrow)

This Achillea species, also known as Wooly yarrow, is a small hardy perennial from southern Europe and western Asia with distinctive gray-green leaves that are lined with so many chubby leaflets that they look almost wooly. The leaves spread close to the ground in a thick, mussy mat from which flower stems rise, topped with a dense cluster of small yellow flowers. Bloom starts in early summer and continues to early fall.

Wooly yarrow has several uses:it can make a thick, flowering groundcover,...

(Dwarf Wooly Yarrow)

Silvery-leaved, low-growing and drought tolerant, this is the perfect small yarrow for rock gardens and sunny border edges. A hybrid of the species Achillea clavennae and Achillea tomentosa, it forms a mat of narrow, gray-green, minutely toothed leaves. Loose, flattened clusters of buttery, pale primrose flowers bloom on short stems from late spring to midsummer. These are attractive to butterflies and have a soft, pretty appearance. Regular deadheading may extend flowering.

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(Dwarf Wooly Yarrow, King Edward Yarrow)

Silvery-leaved, low-growing and drought tolerant, this is the perfect small yarrow for rock gardens and sunny border edges. A cross between the species Achillea clavennae and Achillea tomentosa, 'King Edward' forms a mat of narrow, gray-green, minutely toothed leaves. Loose, flattened clusters of buttery, pale primrose flowers bloom on short stems from late spring to midsummer. These are attractive to butterflies and have a soft, pretty appearance. Regular deadheading may extend...

(Giant Needlegrass, Giant Ricegrass, Giant Stipa)

Upright, graceful leaf blades of giant needlegrass create billowy tufts across the landscape. A cool-season perennial grass that often is short lived, it's native to the rocky and gravelly soils -- especially chaparral habitats -- from the Cascade Mountains of central California southward into Mexico's Baja peninsula. The root system is fibrous.

This bunching grass forms a V-shaped clump with airy, medium green leaves. Leaf blades are thin and held upright and occur in the moisture and cool...

(Monkshood, Sparks Monkshood)

A hybrid tuberous monkshood, 'Sparks Variety' is notable for its tall, thin stems bearing deeply lobed leaves and a terminal branched cluster of deep-violet flowers. Draped with a curious petal-like bract that resembles a hood, the eye-catching flowers give the plant its common name.

This perennial needs well-drained soil with uninterrupted moisture. It grows and flowers best in cool soil and partial sun but will tolerate full sun. The stems may need staking. Note that all parts of the plant...

(Carmichael's Monkshood)

Autumn flowered monkshood is a tuberous-rooted perennial originally from China and valued for its late season bloom. The leaves are produced in mounds and are delphinium-like, dark green, deeply dissected, toothed and have a leathery texture. Deep blue-violet flowers, each curiously shaped like a helmet or hood are produced atop leafy, tall, stately spikes in late summer and fall.

Plant monkshood in evenly moist but not wet soil. Full sun to partly shady locations are preferred. Monkshood grows...