Alabama’s humid August conditions create an ideal environment for heat-loving annuals to establish strong roots, making it the perfect time to add color to your garden. If you’re searching for the best flowers to plant in August in Alabama, you’ve come to the right place. This guide covers top picks that thrive in the late-summer heat and keep blooming into fall.
August in Alabama means hot days and sticky nights. But don’t let that stop you from gardening. Many flowers actually love this weather. They grow fast and bloom hard when the temperatures are high.
You can still plant flowers now and enjoy them through September and October. Some will even last until the first frost in November. The key is choosing the right varieties for your zone.
Most of Alabama falls in USDA hardiness zones 7b to 8b. This means mild winters and long, hot summers. August is a transition month. The soil is warm, which helps roots grow quickly. Just water your new plants well for the first few weeks.
Best Flowers To Plant In August In Alabama
Let’s get into the top flowers that handle Alabama’s August heat like champions. These plants are tough, colorful, and easy to care for. They will fill your garden with life even when the sun is blazing.
Zinnias
Zinnias are practically made for Alabama summers. They laugh at the heat and keep producing blooms until frost. You can start them from seed directly in the ground in August.
- They come in every color except blue
- Zinnias attract butterflies and bees
- They need full sun and well-drained soil
- Water at the base to avoid powdery mildew
Plant zinnia seeds about 1/4 inch deep. Space them 6 to 12 inches apart depending on the variety. They will germinate in 5 to 7 days in warm soil. You will see flowers in about 6 to 8 weeks.
Deadhead spent blooms to keep them flowering. Cut them for bouquets and they will grow back even bushier. Zinnias are one of the most rewarding flowers for August planting.
Marigolds
Marigolds are another August superstar. They thrive in the heat and actually bloom better when it’s hot. Plus they help keep pests away from your vegetable garden.
- French marigolds are compact and bushy
- African marigolds grow tall with large blooms
- They prefer full sun but tolerate some shade
- Marigolds are deer resistant
You can buy marigold transplants at garden centers in August. Plant them 8 to 10 inches apart. Water them deeply once a week unless it rains. They will bloom nonstop until the first hard freeze.
Marigolds also improve soil health. Their roots release a chemical that repels nematodes. This makes them great companions for tomatoes and peppers.
Sunflowers
Sunflowers grow fast and tall in Alabama’s August heat. They are dramatic and fun. Kids love watching them reach for the sky.
- Plant seeds directly in the ground
- Choose varieties that mature in 55 to 70 days
- Sunflowers need full sun and protection from wind
- They attract birds and pollinators
Sow sunflower seeds 1 inch deep and 6 inches apart. Thin them to 12 to 18 inches apart once they sprout. Water regularly but don’t overwater. The tall varieties may need staking if you get strong storms.
You can still plant sunflowers in early August and get blooms before frost. Look for fast-maturing types like ‘Sunspot’ or ‘Teddy Bear’. These stay shorter and bloom quicker.
Cosmos
Cosmos are delicate looking but tough as nails. They handle poor soil and drought once established. August is a great time to start them from seed.
- They have feathery foliage and daisy-like flowers
- Colors include pink, white, and orange
- Cosmos attract butterflies and beneficial insects
- They self-sow easily for next year
Scatter cosmos seeds on bare soil and barely cover them. They need light to germinate. Water gently until they sprout in 7 to 10 days. Thin seedlings to 12 inches apart.
Cosmos bloom in about 8 to 10 weeks from seed. They will keep going until frost. Cut them for bouquets and they will branch out and produce more flowers.
Lantana
Lantana is a heat-loving perennial that acts like an annual in colder areas. In Alabama, it often comes back year after year. It blooms from spring until frost without stopping.
- Lantana loves full sun and heat
- It is drought tolerant once established
- Flowers come in yellow, orange, pink, and red
- Butterflies adore lantana
Plant lantana transplants in August. Space them 12 to 18 inches apart. They will spread and fill in quickly. Water deeply but infrequently to encourage deep roots.
Lantana is almost pest-free. Deer leave it alone. It blooms best when you don’t fertilize too much. Just give it sun and occasional water.
Celosia
Celosia has unusual flowers that look like flames or velvet. It loves heat and humidity. August planting gives it time to show off before fall.
- Two main types: plumed and crested
- Colors include red, orange, yellow, and pink
- Celosia is great for dried flower arrangements
- It needs full sun and well-drained soil
Plant celosia transplants 8 to 10 inches apart. Water regularly until they are established. They bloom continuously without deadheading. The flowers last for weeks on the plant.
Celosia also works well in containers. Combine it with other heat lovers like zinnias and marigolds. It adds texture and height to any arrangement.
Portulaca (Moss Rose)
Portulaca is a low-growing succulent that thrives in Alabama’s August heat. It blooms in bright colors and stays compact. Perfect for hot, dry spots where other flowers struggle.
- Portulaca needs full sun
- It is extremely drought tolerant
- Flowers open in the morning and close at night
- Great for rock gardens and containers
Plant portulaca transplants 6 to 8 inches apart. They will spread to form a colorful mat. Water only when the soil is dry. Too much water causes rot.
Portulaca blooms from planting until frost. It self-sows readily, so you may see volunteers next year. It’s one of the easiest flowers for August planting.
Salvia
Salvia, also called sage, is a heat-tolerant perennial that blooms all summer. Many varieties are hardy in Alabama. They attract hummingbirds and bees.
- Salvia comes in blue, purple, red, and pink
- It prefers full sun but tolerates light shade
- Salvia is deer and rabbit resistant
- It needs well-drained soil
Plant salvia transplants in August. Space them 12 to 18 inches apart. Water deeply once a week. Cut back spent flower spikes to encourage more blooms.
Salvia blooms from late spring until frost. It adds vertical interest to borders. Combine it with marigolds and zinnias for a colorful display.
Verbena
Verbena is a trailing plant that works well in baskets and borders. It loves heat and blooms profusely. August planting gives it time to establish before cooler weather.
- Verbena needs full sun
- It is drought tolerant once established
- Flowers come in purple, pink, red, and white
- Butterflies love verbena
Plant verbena transplants 10 to 12 inches apart. Water regularly until they root in. They will spread and cascade over edges. Deadheading is not necessary but helps keep them tidy.
Verbena blooms from spring until frost. In Alabama, it often survives mild winters and comes back. It’s a reliable choice for August planting.
Gomphrena (Globe Amaranth)
Gomphrena is a tough annual that produces clover-like flowers. It handles heat, humidity, and poor soil. The blooms last a long time in the garden and in vases.
- Gomphrena comes in purple, pink, white, and red
- It needs full sun
- It is very drought tolerant
- Deer and rabbits leave it alone
Plant gomphrena transplants 8 to 10 inches apart. Water deeply but infrequently. The flowers are excellent for drying. Cut them and hang them upside down to preserve.
Gomphrena blooms from summer until frost. It adds texture and color to any garden. It pairs well with zinnias and celosia.
How To Plant Flowers In August In Alabama
Planting in August requires some extra care. The heat stresses new plants. Follow these steps to give them the best start.
Prepare The Soil
Good soil is the foundation of a healthy garden. Alabama soil is often clay or sand. Both need improvement.
- Remove weeds and grass from the planting area
- Loosen the soil to a depth of 8 to 10 inches
- Mix in 2 to 3 inches of compost or aged manure
- Add a slow-release fertilizer according to package directions
- Rake the area smooth
Compost improves drainage in clay soil and holds moisture in sandy soil. It also feeds the soil microbes that help plants grow. Don’t skip this step.
Water Correctly
Water is critical in August. New plants need consistent moisture until their roots spread out.
- Water deeply right after planting
- Keep the soil moist but not soggy for the first week
- After that, water when the top inch of soil feels dry
- Water in the morning to reduce evaporation
- Use soaker hoses or drip irrigation to avoid wetting leaves
Overwatering is just as bad as underwatering. Check the soil before you water. Stick your finger in the ground. If it’s wet an inch down, wait.
Mulch To Protect Roots
Mulch keeps the soil cool and moist. It also blocks weeds. Use 2 to 3 inches of organic mulch around your plants.
- Pine straw works well in Alabama
- Shredded bark or leaves also work
- Keep mulch away from plant stems to prevent rot
- Replenish mulch as it breaks down
Mulch is especially important for August planting. It reduces water loss and keeps roots from cooking in the hot sun.
Provide Shade If Needed
Some plants need a little protection from the afternoon sun. You can use shade cloth or plant them where they get morning sun and afternoon shade.
- Shade cloth with 30% to 50% shade works well
- Remove the shade after a week or two
- Plants grown in full sun from the start are tougher
Most of the flowers on this list love full sun. But if you see wilting in the afternoon, a little shade helps them adjust.
Common Mistakes To Avoid
August planting is easy if you avoid these pitfalls. Learn from others’ mistakes.
Planting Too Late In The Month
Some flowers need time to bloom before frost. Check the days to maturity on seed packets. If you plant too late, you may not get flowers.
- Fast-growing flowers like zinnias and marigolds are safe
- Slow growers like dahlias may not bloom in time
- Stick to the list above for best results
Skipping Soil Preparation
Alabama soil can be tough. If you don’t amend it, plants struggle. Compost is your best friend.
Even if you buy good transplants, poor soil limits their growth. Take the time to prepare the bed. Your flowers will thank you.
Overwatering
It’s easy to water too much in August. The soil dries fast on top but stays wet below. Check before you water.
Overwatering causes root rot and fungal diseases. Most August flowers prefer to dry out between waterings. Let the soil guide you.
Ignoring Pests
August heat brings pests like spider mites and aphids. Check your plants regularly. Catching problems early makes them easier to fix.
- Spray pests off with a strong stream of water
- Use insecticidal soap for stubborn infestations
- Encourage beneficial insects like ladybugs
Frequently Asked Questions
Here are answers to common questions about August flower planting in Alabama.
Can I plant flower seeds in August in Alabama?
Yes, you can plant fast-growing seeds like zinnias, cosmos, and sunflowers in early August. They will bloom before frost. For slower seeds, use transplants instead.
What flowers bloom all summer in Alabama?
Zinnias, marigolds, lantana, and verbena bloom from planting until frost. They thrive in Alabama’s heat and keep producing flowers without a break.
Is it too hot to plant flowers in August in Alabama?
It’s hot, but many flowers love the heat. Choose heat-tolerant varieties and water them well. They will establish quickly in warm soil.
Should I fertilize flowers planted in August?
Use a slow-release fertilizer at planting time. Avoid high-nitrogen fertilizers that push leaf growth over flowers. A balanced 10-10-10 formula works well.
What perennials can I plant in August in Alabama?
Lantana, salvia, and verbena are perennials in most of Alabama. They survive mild winters and come back each year. Plant them in August for strong roots before winter.
August is not too late to add color to your Alabama garden. With the right flowers and a little care, you can enjoy blooms well into fall. Pick from the list above and get planting. Your garden will thank you.
Remember to water consistently, mulch well, and watch for pests. These simple steps make all the difference. Happy gardening in the Alabama heat.