Summer is in full swing, and while springtime planting is long behind, there’s still plenty of opportunity to sow flower seeds. The warm soil of summer is perfect for certain flower varieties that can grow quickly and provide a splash of color before the season ends, or even set the stage for a beautiful early bloom next year. This article will guide you through 31 flower seeds you can sow in the summer, offering late-season beauty and pollinator appeal, and help you keep your garden vibrant for as long as possible.
Why Plant in Summer?
While summer is typically thought of as a time for harvesting or maintaining your garden, it’s also an excellent period for planting many fast-growing flowers that thrive in warm soil. Many flowers that are heat-tolerant can still be planted well into the summer, providing a last burst of color before the cooler months arrive. For those aiming to extend their growing season or prepare for the following year, sowing the right flower seeds in summer can keep your garden flourishing or set the groundwork for a show-stopping spring display.
1. Zinnias
Zinnias are the ultimate summer flower—heat-loving, fast-growing, and colorful. Zinnias can be planted in mid-summer and will bloom until the first frost, making them perfect for a continuous late-season bloom.
2. Cosmos
Cosmos are another easy-to-grow annual that thrives in the heat of summer. They tolerate poor soil and produce delicate, daisy-like flowers that attract bees and butterflies. Sow them in mid-summer for a late burst of blooms.
3. Sunflowers
Sunflowers are iconic summer blooms that grow quickly and make a dramatic statement in any garden. While they’re typically planted in spring, they can be sown in summer for a slightly later bloom.
4. Marigolds
Known for their hardiness and vibrant orange and yellow hues, marigolds are perfect for summer planting. They are quick to bloom and great for borders or companion planting, as they help repel pests.
5. Calendula
Calendula, or pot marigold, is a charming flower that can be sown in late summer for a colorful fall bloom. It’s also known for its edible petals and medicinal properties.
6. Nasturtiums
Nasturtiums are a summer favorite for their edible flowers and fast-growing nature. Sow them in the heat of summer, and they’ll reward you with beautiful blooms and foliage that lasts through the fall.
7. Sweet Alyssum
Sweet alyssum grows quickly and produces masses of tiny, fragrant flowers. It’s perfect for planting in late summer as it tolerates heat and cooler fall temperatures, making it a versatile option for extending your garden’s life.
8. Bachelor’s Button (Cornflower)
Bachelor’s button is a fast-growing annual that can be sown in mid to late summer for a colorful display of blue, pink, or white flowers. These blooms are known for attracting bees and butterflies.
9. Cleome (Spider Flower)
Cleome is a unique, tall flower with spidery blooms that thrive in summer heat. They grow quickly and produce flowers that last until frost, making them an excellent choice for a late-season burst of color.
10. Poppies
While often associated with spring, certain poppy varieties can be sown in summer for blooms in the fall or even the following spring. They are easy to grow and bring a touch of elegance to any garden.
11. Black-Eyed Susan (Rudbeckia)
Black-eyed Susans are heat-tolerant perennials that can be sown in summer. Their bright yellow petals and dark centers attract pollinators and are perfect for adding a wildflower look to your garden.
12. Lupines
Lupines are ideal for summer sowing if you’re planning for next year’s blooms. While they won’t flower in the current year, they’ll establish roots and provide a stunning spring display the following season.
13. Lavender
Although lavender is a perennial, it can be sown in summer to establish itself before the fall. Lavender is drought-tolerant and perfect for gardens that experience hot, dry summers.
14. Chrysanthemums
Chrysanthemums, or “mums,” are a classic fall-blooming flower. By sowing them in summer, you can enjoy a late-season display of these hardy, colorful blooms that thrive in cooler autumn temperatures.
15. Gaillardia (Blanket Flower)
Gaillardia, or blanket flower, is a heat-loving perennial that blooms in vibrant shades of red, orange, and yellow. These flowers thrive in dry conditions and can be planted in summer for a long-lasting display.
16. Coreopsis
Coreopsis is a hardy perennial that blooms well into the fall. Planting it in the summer ensures that your garden will be alive with color as the days grow shorter.
17. Snapdragons
Snapdragons are typically planted in spring, but a summer sowing can give you blooms in the fall, especially in warmer climates. Their tall spikes and array of colors make them a popular choice for garden borders.
18. Echinacea (Coneflower)
Echinacea is a perennial flower known for its large, daisy-like blooms and medicinal properties. Sow echinacea in the summer for blooms that attract pollinators and medicinal uses in future years.
19. Phlox
Phlox is a versatile flower that can be grown as an annual or perennial, depending on the variety. Summer sowing gives them time to establish for a beautiful late-season or early-spring bloom.
20. Borage
Borage is an herb with lovely blue star-shaped flowers that are edible. This heat-tolerant plant can be sown in mid-summer, attracting bees and providing edible blooms well into the fall.
21. Verbena
Verbena is a hardy annual that thrives in summer heat. Sow it in mid-summer for a burst of color that will last until the first frost. Its bright blooms are great for attracting butterflies.
22. Sweet William
Sweet William is a biennial or short-lived perennial that can be sown in summer for blooms the following year. Its colorful, fragrant flowers make it a favorite for cottage gardens.
23. Morning Glory
Morning glory is a fast-growing vine with stunning, trumpet-shaped flowers. Sow in summer for rapid growth and a late-season display that will climb trellises or fences.
24. Shasta Daisy
Shasta daisies are a hardy perennial that can be planted in summer to establish themselves for next year. Their cheerful white petals and yellow centers are perfect for brightening up your garden.
25. Foxglove
Foxglove is a biennial flower that grows tall spikes of tubular flowers. Summer planting allows them to establish roots, with a stunning display the following spring.
26. Hollyhock
Hollyhocks are tall, stately biennials that add a touch of old-fashioned charm to any garden. Summer sowing ensures blooms for the next season, making them a great choice for long-term planning.
27. Dianthus
Dianthus, or pinks, are fragrant, compact flowers that are perfect for borders. Summer planting helps establish them for next spring, ensuring you’ll have a beautiful and fragrant display.
28. Rudbeckia (Gloriosa Daisy)
Rudbeckia, like black-eyed Susans, are heat-tolerant and can be sown in mid-summer for a colorful fall bloom or to establish themselves for the next season.
29. Nigella (Love-in-a-Mist)
Nigella is an easy-to-grow annual with delicate, fern-like foliage and blue, white, or pink flowers. Sow it in summer for a fast-growing flower that thrives in well-drained soil.
30. Salvia
Salvia is a perennial flower that can be planted in summer for a quick burst of color in the fall or a long-lasting display in the following seasons. Its tubular blooms attract hummingbirds and bees.
31. Alyssum
Alyssum is a fast-growing annual that forms carpets of tiny flowers. It’s perfect for summer planting, providing ground cover and pollinator attraction as fall approaches.
Final Thoughts
Summer isn’t just about maintaining your garden; it’s also an ideal time to introduce new flower varieties that can handle the heat. With the right care, these 31 flower seeds will keep your garden thriving well into the late season, adding bursts of color and charm to your outdoor space. Whether you’re looking for a last-minute bloom or preparing for next year’s garden, sowing these flowers will bring beauty, biodiversity, and joy to your garden.
🌻 What are your favorite flowers to plant in summer? Share below! 🌻