Late-Summer Planting Guide: Fresh Blooms to Carry You Into Fall 🍂🌸

By the time the end of August rolls around, our gardens can start to look a little tired. Especially if you stopped watering yours like I did mine! The spring show is long gone, early summer perennials are fading, and the heat has taken its toll. But the good news? With the right plant choices, your garden can burst back into life with vibrant blooms that last right into fall.

Late-summer early fall planting isn’t just about filling in gaps; it’s about extending the beauty of your garden season. By choosing hardy plants that thrive now, you’ll enjoy fresh color, attract pollinators, and set your garden up for a stunning autumn transition. I have listed some of my favorites for color this time of the year.  

 Phlox (Garden Phlox)

A cottage garden classic, phlox comes into its own in August and will last into the fall. Certain varieties bring structure and fragrance, while shorter cultivars add lush pops of pink, purple, and white. Plus, pollinators can’t resist them.

 Dahlias

If you plant tubers earlier in the season, from August and until frost dahlias really shine. Their bold blooms in endless colors are showstoppers for cut-flower arrangements and garden displays alike. Make a note to order tubers to plant in Spring they are available now.  

 Sedum (‘Autumn Joy’ and more)

Succulent sedums are low-maintenance powerhouses. Their clusters of rosy flowers emerge in late summer and deepen in color as fall approaches, offering long-lasting interest. I purchase these now and use in my planters and then later in Fall plant them in the garden.

 Japanese Anemones

Elegant and airy, Japanese anemones are true stars of the late-summer Fall garden. Their delicate pink or white blooms dance in the breeze and add height and movement, carrying their flowering well into fall. I also put this in my planters for Fall and transfer to the garden when I replace them with mums.

 Roses (Repeat-Blooming Varieties)

Don’t forget your roses! Many David Austin and Jackson & Perkins selections bloom strongly again in August into Fall with a second flush of romantic, fragrant flowers. A little deadheading and light feeding now ensures color continues right through September. Use code OLDCASTLE15 for 15% off your order.

 Panicle Hydrangeas (Hydrangea paniculata)

Unlike bigleaf hydrangeas that peak earlier, panicle hydrangeas (like ‘Limelight’ and ‘Pinky Winky’) truly shine in late summer into Fall. Their cone-shaped blooms transition from creamy white to blush pink, adding drama, structure, and season-spanning beauty.

 Annuals for Quick Color

Don’t forget the instant gratification of annuals like zinnias, Tuck them into bare spots for continuous blooms until frost. You will not plant these in the fall, so remember to order the seeds for spring.

Tips for Success

• Water deeply: The August sun can be unforgiving. Give new plants a thorough soak and maintain even moisture while they establish.
• Deadhead regularly: Removing spent blooms will encourage longer flowering and keep plants looking fresh.
• Feed lightly: A mid-season fertilizer can give plants a boost to carry them through to fall.

Bringing It All Together

Imagine strolling through your cottage garden and seeing phlox spilling over with blooms, cheerful millennium Allium catching the sun, and dahlias towering with color. By adding these late-season stars, you can make sure your garden doesn’t just survive —it thrives in it. So next time you’re out in your garden and notice things looking a little faded, think of it as an opportunity. This is the perfect moment to plant for color that lasts, and your garden will thank you with one more spectacular show before autumn sets in.