Arbutus 'Marina' is a hybrid that resembles our native A. menziesii but is easier to grow in a garden situation.

Arctostaphylos uva-ursi, known as kinnikinnick or bear berry, is a slow-growing evergreen native ground cover.

Armeria maritima, sea thrift or sea pink, forms compact mounds of grass-like foliage topped with clusters of pink flowers.

Armeria pseudarmeria Dreameria 'Dream Clouds' is a long-blooming sea thrift with spheres of white flowers.

Armeria pseudarmeria Dreameria 'Dreamland' is a sea thrift with spherical heads of bright pink flowers.

Artemisia abrotanum 'Leprechaun' is a super hardy ancient garden plant with great foliage texture and fragrance like Coca Cola!

Mounds of drought tolerant golden, textured foliage.

Artemisia 'Silver Brocade' forms mounds or carpets of drought tolerant silvery-white, textured foliage.

Artemisia 'Garden Ghost' is a mounding wormwood with beautiful recurved silver-grey foliage and yellow flowers.

Artemisia 'Silver Lining' is a mounding white sagebrush with beautiful, broadly dissected, silver-gray foliage.

Artemisia 'Tiny Green' is a cute little groundcovering hybrid wormwood forming great mats of aromatic, textural, highly dissected, olive green foliage.

The painted arum, Arum italicum, is evergreen throughout winter with mottled arrow-shaped leaves.

Arum italicum 'Marmoratum' has glossy, extra mottled foliage with flowers of greenish-yellow which turn into showy spikes of red berries.

Arum maculatum is an exotic perennial with pale green to yellow spathes with yellow to purple spadices.

Aruncus 'Fairy Hair' is a goat's beard that produces sprays of creamy-white flowers above Astilbe-like, highly dissected foliage.

Aruncus 'Guinea Fowl' is a compact and floriferous goat's beard with highly dissected, fern-like, crinkly leaves and horizontal spikes of bright white flowers on red stems.

Arundo 'Peppermint Stick' is a giant grass with green to blue-green and white variegated foliage.

Asarum arifolium is a wild ginger with arrow-shaped, anise-scented, deep green leaves with silver marbling and strange brownish purple, urn shaped flowers.

Asarum canadense is the Canadian wild ginger with bell-shaped brownish-purple flowers and heart-shaped leaves.

Asarum caudatum f. album known as western wild ginger has glossy evergreen leaves and 3-petaled creamy-white flowers.

Asarum europaeum is a groundcover of the highest order with attractive, somewhat glossy, kidney-shaped to round foliage on creeping rhizomes.

Asarum 'Ling Ling' has heart shaped, evergreen, bright green foliage with silver blotches for the shade garden.

Asclepias curassavica 'Monarch's Banquet' is a tender variegated milkweed with nectar-rich blooms in bright orange-reds all summer long.

Asclepias curassavica 'Monarch's Promise' is a variegated milkweed with blooms in scarlet red and orange all summer and fall.

Asclepias fascicularis is a monarch butterfly host with intricate pale pink and white flowers.