Replace Summer Annuals With Fall-Friendly Options
For uninterrupted color and interest, plant fall friendly-flowers such as pansies, verbena, mums, cabbages, and flowering kale in their place. Bring herbs inside once the weather cools down to protect them from the cold.
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.
1) Empty out the dead flowers, roots, and used potting soil.
Compost bags are often available in the fall at local hardware stores. The trash bag is for dead plants that looked diseased. Throw away any plants that looked diseased at the end of the growing season, as well as all the potting soil from that flowerpot.
Another good idea is to remove annual flowers after a killing frost. In addition, perennials that show signs of disease should be cut back in the fall.
Wait to prune spring flowering plants right after they bloom. Any of your annuals that are no longer attractive can be either cut off at ground level or pulled out of the ground now. Or you can wait until later in the fall or even next spring. Here is a mix of annuals and perennials in early November.
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.
Growing tips: Plant blooming varieties in fall in well-draining soil about a month before the first frost for quick color. Then cut them back to about 8 inches above the ground when they finish blooming. Cover with sand, sawdust or a noncomposting mulch if you want.
Autumn is a great season for annuals, low-maintenance perennials and evergreen shrubs to shine. In fact, some of the most popular flowers, like colorful mums, roses, dahlias, purple pansies and yes, even bright yellow sunflowers, all bloom around September and October.
From classic fall shades of red, orange, and yellow to vibrant purple and pink blooms you might associate with warmer temperatures, there's an endless supply of options for colorful fall plants. And with all the entertaining the fall season has to offer, lively cut-flower blooms are sure to come in handy.
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.
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.
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.
Some perennials, like hostas, peonies and daylilies, need to be pruned in fall to avoid winter damage. Plants like these should be pruned after the first few frosts in late fall or early winter.
If you can decide, the best way of determining when to transplant is based on the flowering pattern of each plant. If your perennial blooms in the spring or early summer, it should be transplanted in the fall. If your perennial blooms in the late summer or early fall, transplant it in the spring.
Preparing for a Fall Vegetable Garden
Although many vegetables grow and mature well into the fall, most need to be started before the nights turn cold. In climates with early frost dates, your fall garden will need to be started in mid-summer from late July through August.
Also, do not cut back hardy perennials like garden mums (Chrysanthemum spp.), anise hyssop (Agastache foeniculum), red-hot poker (Kniphofia uvaria), and Montauk daisy (Nipponanthemum nipponicum). Leave the foliage. It's important to protect the root crowns over winter.
After zinnias flower, cut off the old flowers (a process called “deadheading”) to encourage more flowers to form. Zinnias are annuals and will die with the first hard frost of fall. If you want them to reseed, let the last flowers of the season mature fully and scatter their seeds.
Remove Most Annuals
In general, these plants are easy to spot because after the first hard frost, many of them, including impatiens, begonias, and coleus, have withered and turned brown. If the spent foliage and blossoms on these plants are free of mold and disease, we put them in the compost pile.