August may feel like the final stretch of summer, but the gardening season is far from finished. In fact, this transitional month can be an excellent opportunity to refresh flower beds, containers, and borders with plants that appreciate the cooler conditions of early fall.
As summer temperatures gradually ease, many cool-season flowers can establish well and provide fresh color when some warm-season plants begin to slow down. Extension gardening resources commonly recommend flowers such as pansies, snapdragons, calendula, sweet alyssum, and dianthus for cool-season displays.
The best choices will depend on your climate and expected first frost date. In cooler regions, August may be better for planting established transplants or starting flowers that will bloom the following spring. Gardeners in mild climates often have a longer window for fall flowers.
Here are 12 beautiful fall garden favorites worth considering this August.
1. Pansies
Pansies are classic cool-season flowers, valued for their cheerful blooms and impressive range of colors. They work especially well along pathways, at the front of flower beds, and in patio containers.
Plant pansies in fertile, well-drained soil and give them sun or partial shade. In areas where August remains very hot, waiting until temperatures moderate or starting plants in a protected location can help them establish more comfortably.
2. Violas
Closely related to pansies, violas produce smaller flowers but often make up for their size with an abundance of blooms.
They are excellent for containers, window boxes, borders, and gaps between larger plants. Their compact growth also makes them useful when you need color without overwhelming neighboring flowers. Violas are particularly attractive when several complementary colors are planted together.
3. Snapdragons
Snapdragons bring height and structure to a fall flower garden. Depending on the variety, their colorful flower spikes may remain relatively compact or grow several feet tall.
Snapdragons prefer cooler conditions and can be planted from mid- to late summer for fall performance. Removing faded flower spikes can also encourage additional flowering.
Use shorter varieties near the front of borders and taller types toward the back.
4. Calendula
Calendula, commonly called pot marigold, is an easy-going flower with bright yellow and orange blooms that fit naturally into an autumn color scheme.
It is among the annual flowers that can be directly seeded outdoors, and some extension services specifically recommend calendula seed for late-season planting.
Give calendula plenty of sunlight and soil that drains well. Regularly removing older flowers can help keep the plants tidy and productive.
5. Sweet Alyssum
If you need something low-growing, sweet alyssum deserves a place on your list. Its clusters of tiny flowers create a delicate carpet around taller plants and look particularly attractive spilling over the edges of containers.
Sweet alyssum performs well during cooler weather and is useful as an edging plant. It can also be direct-sown, although planting dates should always be adjusted to local temperatures and frost conditions.
6. Dianthus
Dianthus offers colorful flowers on neat, compact plants and can be a practical addition to borders and containers.
Many types prefer good drainage and plenty of sunlight. Avoid planting them in areas where the soil remains constantly wet.
Because there are annual, biennial, and perennial types of dianthus, check the plant label or seed packet before planting so you know what to expect through winter and the following growing season.
7. Asters
Few flowers signal the arrival of fall quite like asters. Their daisy-shaped blooms can provide shades of purple, blue, pink, and white when the garden begins transitioning away from its summer palette.
August into early September can be a suitable period for planting established fall-flowering plants such as asters, depending on local conditions.
Plant them in a sunny position with well-drained soil and provide consistent water while new roots become established.
8. Chrysanthemums
Chrysanthemums, or mums, are among the most recognizable fall flowers. Their dense displays of yellow, bronze, orange, red, pink, purple, and white can quickly refresh tired containers and flower beds.
When planting mums in August, water the root zone thoroughly and continue monitoring soil moisture during warm weather.
Gardeners who want mums to survive beyond a seasonal display should choose appropriate hardy varieties and give them enough time to establish roots before winter.
9. Sedum
For something different from traditional daisy-shaped fall flowers, consider a fall-blooming sedum.
Sedums are known for fleshy foliage and clusters of small flowers. Many established varieties become increasingly attractive as summer moves into fall.
They generally prefer sunny locations and well-drained soil. Once established, many sedums are relatively tolerant of dry conditions, making them useful in lower-maintenance flower beds.
10. Marigolds
August does not necessarily mean the end of marigold season. In areas with a sufficiently long, warm fall, young marigolds can provide another round of bright color before frost.
Their warm yellow, orange, and red tones fit beautifully into autumn planting schemes.
For late planting, established nursery plants can provide quicker results than starting from seed. Keep them in full sun and remove faded flowers regularly to maintain a neat display.
11. Petunias
Petunias are usually associated with spring and summer, but healthy plants can continue providing color into fall where temperatures remain suitable.
Cold-tolerant petunias may continue blooming into October in sunny, protected locations, according to UMass Extension.
Use them in hanging baskets, containers, or sunny borders. Regular watering and removal of faded blooms can help maintain their appearance.
12. Bachelor’s Buttons
Bachelor’s buttons, also called cornflowers, are charming flowers that bring an informal cottage-garden appearance to beds and borders.
They are included among cool-season annuals and can also be directly seeded into prepared garden soil.
They work particularly well in relaxed mixed borders alongside calendula, snapdragons, and other cool-season favorites.
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