With this latest in the distinguished Brooklyn Botanic Garden series, you can minimize maintenance and maximize enjoyment of your garden. An A to Z handbook to saving money, time, and resources offers clever shortcuts for all your indoor and outdoor gardening chores. Try these ideas: Set a small pot inside a larger one to propagate dozens of African violets at once. Use birds as your chief insecticide, with birdbaths along paths, seed sprinkled on plant leaves, and shade tree resting-nesting places. Create free composts, mulches, and fertilizers from your fall leaves, summer grass clippings, kitchen wastes, and spent plants, with a simple sheet method that eliminates expensive tumblers.