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.
It's time for planting fall color, such as mums and asters, as well as sprucing up planter boxes. You also may be surprised to learn that it's the best time of year to plant perennials and shrubs (trees, too!) while plants still have an opportunity to establish their root systems before the ground freezes.
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.
Chrysanthemums. 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.
For starters, spring-blooming bulbs should be planted in fall. Trust us: You'll be glad you planned ahead when you see them pop up after a long, dark winter! Get them in the ground any time before the ground freezes, which is from October to mid-December, depending on where you live.
Some fast growing fall crops like lettuce and radishes can be planted into late September, but many desirable fall crops like broccoli and carrots need several months of prime-growing conditions to mature before frost and low light levels set in.
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.
You may have time to sow quick-maturing crops without protection. Plant fall salad greens such as spinach, winter lettuce, arugula, mâche, corn salad, mustard, and radishes. Use a cold frame or plastic tunnel if time is short. Plant next year's garlic crop and divide multiplier onions.
Plant Flowers and Vegetables
If you live in a frost-free region, October is a great time to plant cool-weather flowers and vegetables in your garden. Crops such as kale, cabbage, collards, lettuce, carrots, mustard, onions, Brussels sprouts, cauliflower, beets, and garlic can all be planted in early to late October.
Leafy greens and Brassicas: Lettuces, spinach, and Swiss chard can be planted from seed or from transplant this month. Plant members of the Brassica family, including broccoli, cabbage, Brussels sprouts, kale, kohlrabi, and cauliflower, from transplant. Kale can also be planted from seed in October.
Bright reds, soft pinks, sunny yellows –– these colors can still pepper your lawn, even when there's snow. You just need winter flowers that bloom in the cold. Viola, winter jasmine, calendulas, and many plants love cooler temperatures, and they don't hesitate to take advantage of winter's pollinators.
The latest time to plant for most vegetables would be the second week in June with a short harvest time. If planting crops that mature within 50 days, you could plant those as late as the last week in June, but keep in mind the weather will be turning cooler, especially at night. Cool crops are best for late plantings.
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.
You may think it's too late to grow all your favorite vegetables from seeds, but warm May temperatures have made the soil perfect for sowing seeds. Warm soil will allow for fast germination and growing plants! Good choices are summertime kitchen garden staples like squash, beans, cucumbers and melons.
Asters. The starlike flowers of asters are the grand finale of perennial flowers that bloom from spring to fall, almost completely covered in blooms late in the summer and often lasting until the first frost. Asters typically flower in deep purple and lush lavender, but there are also white and pink varieties.
Stick with Pincushion Flower
Butterfly Blue pincushion flower is a nonstop perennial that blooms all summer. The cushion-like blue flowers are on slender stalks reaching 12 to 15 inches tall and are a surefire way to attract butterflies.
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.
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.
Spring-blooming perennials, especially in the bare root form, are best planted early in the fall. Planting in the fall while the soil is still warm will give the roots enough time establish properly. This allows the plants to emerge from well established roots, with a stronger start, the following spring.
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.