Top Perennials to Plant in August: A Guide to Choosing Perennials that Will Establish Well in Late Summer for a Robust Display Next Year

As summer begins to wind down, August offers the perfect opportunity to plant perennials that will provide a spectacular display in your garden next year. The warm soil and lingering daylight make this an ideal time for perennials to establish strong root systems before winter sets in. Below, we’ve compiled our top recommendations, including the striking Perennial Hibiscus, to ensure your garden thrives next season.

1. Perennial Hibiscus (Rose Mallow)

For those looking to make a bold statement, Perennial Hibiscus is the perfect choice. Known for its enormous, tropical-like blooms, some reaching up to 12 inches across, this perennial thrives in sunny locations with moist soil. Varieties such as ‘Lord Baltimore’ and ‘Cherry Cheesecake’ will add dramatic color to your garden. Planting in August allows these showstoppers to establish strong roots, ensuring they burst into bloom next summer.

2. Echinacea (Coneflower)

Echinacea, with its daisy-like flowers and ability to attract pollinators, is a must-have for any garden. By planting in August, you give Echinacea the time it needs to develop a strong root system, leading to a robust display of vibrant blooms year after year. Consider popular varieties like ‘Magnus’ or ‘PowWow Wild Berry’ for a vibrant splash of color.

3. Rudbeckia (Black-Eyed Susan)

Rudbeckia is known for its cheerful yellow petals and contrasting dark centers, bringing sunny brightness to any garden. These hardy perennials are drought-tolerant once established, making them ideal for low-maintenance gardens. Planting in August gives Rudbeckia the head start it needs to survive winter and come back strong and beautiful in spring.

4. Sedum (Stonecrop)

Sedum is a tough, low-maintenance perennial that adds texture and interest to garden beds. Its fleshy leaves are great for storing water, making it a perfect choice for hot, dry spots. Varieties like ‘Autumn Joy’ offer late-season color and are particularly well-suited for August planting, allowing them to establish quickly in warm soil.

5. Heuchera (Coral Bells)

Heuchera is prized for its stunning foliage, which comes in a variety of shades from deep burgundy to bright lime green. August is an excellent time to plant Heuchera, as it allows the plant to establish a strong root system before winter. These perennials are perfect for adding color and texture to shady areas of your garden.

6. Hosta

Hostas are a top pick for filling shady areas with lush, leafy green growth. Known for their resilience, Hostas thrive in less sunny spots and can create a striking display. Planting in August ensures that your Hostas have time to establish before winter, leading to a full and vibrant garden display next year.

7. Aster

Asters bring a burst of color to the garden just as many other perennials are finishing their bloom cycle. Planting Asters in August allows them to root in well before winter, so you can enjoy their vibrant purple, pink, or white flowers next fall. These late bloomers are also great for attracting butterflies.

8. Phlox

Phlox is known for its sweet fragrance and clusters of colorful blooms. By planting in August, you give Phlox ample time to establish, ensuring a full, bushy display of flowers next year. Look for mildew-resistant varieties like ‘David’ to keep your garden healthy and thriving.

9. Coreopsis

Coreopsis is an excellent choice for adding long-lasting color to the garden. These bright, cheerful flowers are easy to grow and known for their extended blooming season. Planting in August ensures they get a strong start, allowing them to flourish in the seasons to come.

10. Daylilies

Daylilies are beloved for their continuous blooming throughout the summer. Although they can be planted at various times during the growing season, August is particularly advantageous as it allows Daylilies to settle in before the winter months, setting the stage for an even more abundant display next summer.

11. Salvia

Salvia, with its vibrant flower spikes, is a must-have for attracting hummingbirds and butterflies. August is a great time to plant Salvia, giving it the opportunity to establish itself before winter, leading to a reliable and beautiful display of blooms next year.

Tips for August Planting

  • Watering: Ensure consistent moisture for newly planted perennials to help them establish strong roots. Deep watering during dry spells is essential.
  • Mulching: A layer of mulch will help retain moisture and keep roots cool during the remaining warm days of summer.
  • Fertilizing: Use a slow-release fertilizer to provide the nutrients necessary for healthy root development.

By planting these perennials in August, you’re setting the stage for a vibrant, colorful garden that will bring joy for years to come. Happy planting from the team at Copia Home & Garden!