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

By Michelle and the Plant Geeks at Lakeview Nurseries

August may signal the winding down of summer, but for gardeners, it’s an ideal time to plant perennials that will establish themselves well for a robust display next year. With warm soil and plenty of daylight, perennials planted now have time to develop strong root systems before winter. Here are some top picks, including the stunning Perennial Hibiscus, for planting this month.

1. Perennial Hibiscus (Rose Mallow)

If you’re looking for a showstopper, Perennial Hibiscus is the way to go. Known for its enormous, tropical-looking blooms that can reach up to 12 inches across, this hardy perennial thrives in sunny spots with moist soil. Varieties like ‘Lord Baltimore’ or ‘Cherry Cheesecake’ will add a bold splash of color to your garden. Planting in August allows the Perennial Hibiscus to establish roots, ensuring a spectacular display of blooms next summer.

2. Echinacea (Coneflower)

Echinacea is a garden favorite, prized for its daisy-like flowers and ability to attract pollinators. August planting gives Echinacea the time it needs to establish a strong root system, ensuring a hardy plant that will produce vibrant blooms for years. Consider varieties like ‘Magnus’ or ‘PowWow Wild Berry’ for a burst of color.

3. Rudbeckia (Black-Eyed Susan)

Rudbeckia is known for its bright yellow petals and contrasting dark centers, bringing cheer to any garden. These hardy perennials are drought-tolerant once established. By planting in August, Rudbeckia can settle in and be ready to bring vibrant color to your garden next summer.

4. Sedum (Stonecrop)

Sedums are tough, low-maintenance perennials that add texture to your garden. Their fleshy leaves store water, making them perfect for hot, dry spots. Varieties like ‘Autumn Joy’ provide late-season interest and establish quickly in warm soil, making August a perfect time to plant.

5. Heuchera (Coral Bells)

Heuchera, known for its stunning foliage in shades from burgundy to lime green, is an excellent choice for adding color to shady areas. August planting allows Heuchera to develop a strong root system before winter, ensuring it thrives next year.

6. Hosta

For shady spots, Hostas are a top pick. These perennials are known for their resilience and lush, leafy appearance. Planting in August gives Hostas the opportunity to establish well before the cold weather sets in, setting the stage for a robust display next year.

7. Aster

Asters are late bloomers that bring a burst of color to the garden just as many other perennials are winding down. Planting Asters in August ensures they have ample time to root before winter, so you can enjoy their vibrant purple, pink, or white blooms next fall.

8. Phlox

With its sweet fragrance and colorful clusters, Phlox is a garden staple. August is the ideal time to plant Phlox, giving it time to establish for a full, bushy display of flowers next year. Choose mildew-resistant varieties like ‘David’ for best results.

9. Coreopsis

Coreopsis offers bright, cheerful flowers that provide long-lasting color. These easy-to-grow perennials are perfect for August planting, ensuring they have a strong start and will flourish in the coming seasons.

10. Daylilies

Daylilies are known for their continuous summer blooms. While they can be planted throughout the growing season, August is particularly good as it allows them to settle in before winter, setting them up for a prolific display next summer.

11. Salvia

Salvia, with its vibrant flower spikes, is a must-have for attracting hummingbirds and butterflies. Planting in August ensures that Salvia has time to establish itself, leading to a beautiful and reliable display of blooms next year.

Tips for Planting in August

• Water Wisely: Ensure newly planted perennials get consistent moisture to establish strong roots. Water deeply during dry spells.
• Mulch: A layer of mulch helps retain moisture and keeps roots cool during the remaining warm days of summer.
• Fertilize: Use a slow-release fertilizer to provide nutrients that will encourage root growth and health.

By planting these perennials in August, you give them the best chance to thrive, ensuring a colorful and vibrant garden for years to come.

Happy gardening from Michelle and the Plant Geeks at Lakeview Nurseries!