Gardening Calendar September 27, 2021September 16, 2021 by Amye King September : Annuals & PerennialsLast chance for planting perennials and biennialsPlant peoniesSeptember : BulbsPlant spring-flowering bulbs late in the month if not in south Alabama Support the Montgomery Botanical Gardens when you shop on Amazon and a portion of your purchase will go to improve the Gardens. 1. Go to smile.amazon.com2. Click the ‘Start Shopping’ button3. Shop as usual.