See this page: Index A Part 2 for advice on How to Grow Allium caeruleum, Allium giganteum, Allium Globemaster, Allium moly, Allium schoenoprasum, Alnus glutinosa, Aloe vera, Amaranthus retroflexus, Amaryllis belladonna, Ambrosia artemisiifolia, Amelanchier alnifolia, Amelanchier canadensis, Ammi majus, Anemanthele lessoniana, Anemone blanda, Anemone coronaria, Anemone hupehensis, Anemone sylvestris, Anethum graveolens, Annona reticulata, Anthurium andraeanum, Antirrhinum majus, Aquilegia vulgaris, Aralia elata, Araucaria araucana, Araucaria heterophylla, Arbutus unedo, Arctostaphylos uva ursi, Argyranthemum frutescens, Armeria maritima, arnica montana, Aronia melanocarpa, Artemisia absinthium, Artemisia vulgaris, Arum italicum, Aruncus dioicus, Arundo donax, Asarum europaeum, Asclepias curassavica, Asclepias incarnata, Asclepias syriaca, Asclepias tuberosa, Asimina triloba, Asparagus densiflorus, Aspidistra elatior, Asplenium nidus, Astrantia major, Athyrium filix femina, Aucuba japonica.