Think gardening season is winding down? August is actually a great time to plant flowers that will carry your garden from late summer right into fall.
While your neighbors’ yards start to fade, yours can be just hitting its stride. The real trick for a strong late-season garden is knowing which flowers do well when planted in August’s warm soil and cooler nights.
Ready to create a fall garden that brings in pollinators? Let’s get started.
Why August Planting Works So Well
Spring isn’t the only good time to plant. August offers ideal soil conditions for certain flowers; warm earth below with gradually cooler temperatures above. It’s like giving your plants a head start.
Studies show that plants established in late summer often develop stronger root systems before winter than those planted in spring. This gives them a real advantage next season.
9 Flowers That Do Well When Planted in August
1. Autumn Joy Stonecrop – The Low-Maintenance Option
If your garden soil isn’t perfect, this plant is worth a try. Autumn Joy Stonecrop actually prefers not being fussed over too much.
This hardy perennial thrives in USDA zones 3-9 and transforms from lime-green buds to deep russet blooms that last well into fall.
• Sunlight needs: Full sun (at least 6 hours daily)
• Soil requirements: Just about anything that drains, even poor soil
• Maintenance level: Very low (perfect if you occasionally forget to water)
2. Cockscomb – The Bold Statement
Want something colorful? Cockscomb delivers. Its velvety blooms come in bright reds, pinks, and oranges. Plant in August, and these flowers will keep going through fall, lasting until frost.
• Growing zones: 10-11 as perennials; 2-9 as annuals
• Sunlight needs: Full sun
• Nice bonus: Does well in poor soil and heat that would stress other flowers
3. Violet – The Two-Season Bloomer
These might look delicate, but they’re tougher than they appear. Plant violets in August and you’ll get blooms in fall, then again in early spring after they go dormant for winter. Their sweet fragrance is a nice touch, too.
• Growing zones: 3-9
• Sunlight needs: Partial sun (morning sun with afternoon shade works well)
• Care tip: Keep soil consistently moist for best flowering
4. Sweet Alyssum – The Fragrant Ground Cover
This delicate-looking plant is actually quite productive. Sweet Alyssum creates carpets of tiny white blooms (purple and pink varieties exist, too) that smell like honey.
August planting means you’ll enjoy their scent just when the rest of the garden starts fading.
• Growing zones: 7-11 as perennials; 3-6 as annuals
• Sunlight preferences: Full sun to partial shade
• Perfect for: Edging pathways or containers where it can spill over
5. Kniphofias – The Architectural Choice
Also called Red Hot Pokers, these bring height and structure without demanding constant attention. Plant in August to give them time to establish strong roots before winter.
• Growing zones: 5-9
• Sunlight needs: Full sun
• Important: Needs excellent drainage (sitting in wet soil will kill them)
6. Astrantias – The Shade Garden Option
These take a bit more attention, but they’re worth it. The star-shaped blooms (nicknamed “Masterwort”) are unique-looking.
August planting in a cool, shady spot gives them the best conditions to establish before their fall show.
• Growing zones: 4-7
• Sunlight needs: Partial shade
• Soil requirements: Consistently moist, rich soil (these need more care than most)
7. Red Salvia – The Pollinator Favorite
Want to attract hummingbirds? Red Salvia (Scarlet Sage) is one of the best options. The bright red spikes do well when planted in August’s warm soil, and will keep blooming until hard frost.
• Growing zones: 10-11 as perennials; 2-9 as annuals
• Sunlight needs: Full sun to part shade
• Bonus: Deer and rabbit resistant (they don’t like its aromatic foliage)
8. Mums (Chrysanthemum) – The Fall Standard
These are popular in the fall for good reason. Here’s what many people don’t realize: buying already-blooming mums in September means they’re treated as annuals.
Get them in the ground in August instead for more vigorous plants that will return year after year in zones 5-9.
• Sunlight needs: Full sun
• Tip: Water at the base to prevent mildew on leaves
• Color range: From bronze to purple and everything in between
9. Dahlia – The Statement Flower
If you want something eye-catching, dahlias deliver. These produce blooms ranging from dinner-plate size to small pompoms in just about every color.
August planting means they’ll peak right when your garden needs it most.
• Growing zones: 8-11
• Sunlight needs: Full sun
• Soil requirements: Rich, well-drained soil with regular watering
Your August Planting Plan
Here’s how to get started:
- Prep your soil by adding compost to tired summer beds
- Choose flowers based on your growing zone and light conditions
- Plant in the evening to reduce transplant shock
- Water consistently during the first 2-3 weeks
- Add mulch to retain moisture and regulate soil temperature
The difference between new and experienced gardeners is often just a matter of timing. Now you know that August isn’t the end of the planting season. It’s actually a second opportunity. Your fall garden can look great while others are putting their tools away.