Planting perennials and wildflowers in the fall gives them a head start on growth the following spring. The colder weather in fall causes less stress on your new plants, allowing for the root systems to establish themselves in a comfortable environment before the winter.
Tip. Mid- to late-August is often an excellent time to plant fall flowers, as long as the weather isn't still so hot that the plants will suffer heat stress.
The cooler temperatures make autumn ideal for planting spring-blooming bulbs and some perennial shrubs. Planting them at the correct time in autumn will ensure that new plants have some time before the frosts begin to develop roots and establish themselves before winter.
Although each plant's needs may vary and some will be more winter-hardy than others, in general about a month before the last fall frost is sufficient in giving the plant enough time to establish itself and take root.
October is the season to plant spring-blooming bulbs, wildflowers, and many standard gardening favorites. The flowers that don't blossom this winter can spend the cold season in the ground, strengthening their root systems in preparation for a springtime bloom.
Gardening in the fall provides a longer period with more 'good' days, as compared to the often tumultuous spring season. Plus, if you plant in fall you'll end up ahead of the game and won't have to rush to get everything done after winter. In fact, a good strategy is to plant perennials when you plant your fall bulbs.
From early fall through most of November is one of the best times of year to plant spring-blooming bulbs, cool-season annuals and vegetables, as well as many trees, shrubs, and perennials.
Late summer or early fall is an excellent time to plant mums, one of the symbolic flowers of the season. Practically any time in September that strikes your fancy is a good bet, so long as it's at least six weeks before the year's first frost.
Violas and Pansies
These hardy little flowers not only have gorgeous blooms but can survive almost anything winter has to dish out. Violas and pansies grow best in partial shade but need a minimum of four hours of sunlight a day.
September is a great time to plant those fall flowers. There are many varieties that can be planted this fall to start blooming early spring.
The date that your ground actually freezes varies from year to year, of course, and some areas won't have frozen ground at all. If you're unsure, mid-November is a safe planting deadline for nearly everyone. - Get everything in the ground before the ground freezes.
Chrysanthemums say fall as much as turkey says Thanksgiving. Commonly known as mums, these blooms are an all-time fall favorite for a good reason. Available in an array of colors, including orange, red, yellow, and white, these autumn blooms are made for container gardens, pumpkin arrangements, and garden beds alike.
Late summer and early fall, such as September, is the best time to plant chrysanthemums which are hardy perennials that will grow back each and every year with the proper care. Peonies are also perennials, so after you plant them once in September, they'll come back year after year with the proper care.
Think about ways to add color and draw beneficial insects to your fall gardens. Consider planting nasturtiums, marigolds, asters, cosmos, mums, and anemones. Plan out your fall pots and planters. Summer blooms are fading, but there are many opportunities to add color and visual interest to your landscape.
Flowers to plant in September
English marigold (Calendula) has deep orange petals, which are perfect for a hot border or for cutting. It's easy to grow – from an autumn sowing it should flower from May. Sow direct into shallow drills or on the surface of moist peat-free compost, in pots.
It's true! Planting perennials in the fall is an easy way to enjoy a bigger, more beautiful garden the following year. While most gardeners are more accustomed to planting in spring, fall is also an ideal time to get perennials established in your garden.
Flowers that come back up from their roots every year in the springtime are called “perennial” flowers. Some of the best perennial flowers to grow in a garden are peonies, daylilies, coneflowers, and hollyhocks.
Plant wallflowers, forget-me-not, Bellis, Primula, Viola (including winter pansies) and other spring bedding plants in prepared ground or pots.
In areas with cold winters, such as USDA Hardiness zones 5 and 6, you'll generally want to wrap up fall planting by late October, and by mid-October in zones 3 and 4. But better late than never!