| | Max height | Min zone | Exposure | Water |
|---|
| Abelmoschus | | | sun | |
| Abronia villosa | | | sun | moderate
less when dormant |
| Abutilon longicuspe | | | | |
| Abutilon × suntense | | 8 | sun | |
| Acaena montana | | 6 | sun | |
| Acaena saccaticupula | | 6 | part-sun | |
| Acanthus mollis | | 6 | sun
part-sun | moderate
dry |
| Achimenes Hybrid Cultivars | | 10 | part-sun | |
| Achimenes longiflora | | 10 | part-sun | |
| Acinos alpinus | | 5 | part-sun | |
| Aconitum Hybrid Cultivars | | 4 | sun
part-sun | |
| Aconitum carmichaelii | | 3 | sun
part-sun | |
| Aconitum lycoctonum | | 3 | sun
part-sun | |
| Aconitum napellus | | 5 | sun
part-sun | |
| Adenophora liliifolia | | 4 | sun
part-sun | |
| Adenophora polyantha | | 7 | part-sun | |
| Aechmea dichlamydea | | 9 | shade | |
| Aechmea distichantha | | 9 | part-sun | |
| Aechmea fasciata | | 9 | shade | |
| Aechmea fulgens | | 9 | shade | |
| Aechmea gamosepala | | 8 | shade | |
| Aechmea orlandiana | | 9 | shade | |
| Aechmea ornata | | 9 | shade | |
| Aechmea phanerophlebia | | 9 | part-sun | |
| Aechmea recurvata | | 8 | part-sun | |
| Aechmea weilbachii | | 9 | shade | |
| Agapanthus | | 6 | sun
part-sun | moist
moderate
dry |
| Agapanthus Hybrid Cultivars | | 7 | sun | |
| Agapanthus africanus | | 9 | sun | moist
moderate
dry |
| Agapanthus campanulatus | | 7 | sun
part-sun | moist
moderate
dry |
| Agapanthus caulescens | | 7 | sun | |
| Agapanthus inapertus | | 7 | sun | moist
moderate |
| Agapanthus inapertus subsp. pendulus | | 7 | sun | |
| Agapanthus praecox | | 9 | sun | moist
moderate
dry |
| Agastache Hybrid Cultivars | | 7 | sun | |
| Agastache foeniculum | | 8 | sun | moist |
| Agave celsii | | 9 | sun | |
| Agave filifera | | 8 | sun | moderate
dry |
| Agave macroacantha | | 9 | sun | |
| Agave shawii | | 9 | sun | |
| Ageratum houstonianum | | 10 | sun | |
| Ajuga genevensis | | 6 | sun | |
| Ajuga pyramidalis | | 6 | sun
part-sun | |
| Ajuga reptans | | 5 | sun
part-sun | |
| Alkanna tinctoria | | 5 | sun | |
| Allamanda blanchetii | | 11 | sun | |
| Allium Hybrid Cultivars | | 7 | sun | |
| Allium aflatunense | | 8 | sun | |
| Allium caeruleum | | 6 | sun | |
| Allium cristophii | | 7 | sun | |