Gardening Calendar April 19, 2021April 12, 2021 by Amye King April: LawnsNew lawns may need supplemental watering.Fertilize at 3- to 6-week intervals.April: RosesWatch for disease and insects.Keep old flower heads removed. Information gathered from Alabama Cooperative Extension System 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.