While most garden tasks are done in the spring, fall is a great time to do some planting, too. For best results, start planting at least six weeks before the first frost, Better Homes & Gardens says. Spring-blooming bulbs such as daffodils and winter aconite must go in before winter, and leafy greens such as Swiss chard and most root vegetables thrive in cooler temperatures. Plant new grass, trees and shrubs now to help them get established ahead of the dormant season. And perennials such as peonies should be planted in the fall, alongside groundcover plants such as hostas.