Acanthus mollis ‘Rue Ledan’ (bear’s breeches ‘Rue Ledan’)

Acanthus spinosus (bear’s breeches)

Achillea ‘Moonshine’ (yarrow ‘Moonshine’)

Aconitum fischeri (azure monkshood)

Aconitum henryi ‘Spark’s Variety’ (monkshood ‘Spark’s Variety)

Actaea racemosa (black cohosh)

Actaea ‘Queen of Sheba’ (bugbane ‘Queen of Sheeba’)

Adiantum pedatum (northern maidenhair fern)

Agastache ‘Blue Fortune’ (giant hyssop ‘Blue Fortune’)

Agastache nepetoides (yellow giant hyssop)