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.

Aristolochia macrophylla (A. durior), the Dutchman's pipe, has beautiful heart shaped leaves and cool pipe-shaped flowers.

Armoracia rusticana is known as horseradish and is harvested for its pungent, fleshy roots and used as sides in culinary dishes.

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

Artemisia arbrotanum is a super hardy ancient garden plant with great foliage texture that smells 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 'Sea Foam' is an awesome silvery textural plant for hot, sunny locations

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.

Arum creticum forms sophisticated yellow spathes 8-10 inches long with a fragrance of freesia and lemon.

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

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

Asarum maximum 'Shell Shocked' is a wild ginger with silver tortoise-shell veins on shiny green foliage and dramatic black and white flowers.

Asclepias curassavica is a milkweed with blooms in scarlet red and orange.

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 incarnata 'Cinderella' has dense clusters of small rose pink and white vanilla-scented flowers that attract butterflies.

Asclepias 'Ice Ballet' has intriguing and ornate icy white milkweed flowers on strong stems. Beautify your garden and help the butterflies.

Asclepias perennis is a butterfly milkweed with white and pink flowers.

Asclepias speciosa is the western North American sister species to the eastern common milkweed (Asclepias syriaca).