Louisiana’s warm climate presents gardeners with a unique opportunity in August, a month often overlooked for planting due to the prevailing heat and humidity. However, with the right knowledge of what to plant—whether it’s vegetables, flowers, herbs, or landscape plants—home gardeners can take full advantage of the burgeoning late summer season.
This guide will explore suitable planting options across these categories, providing detailed insights into each plant’s characteristics, growing requirements, and best practices tailored to Louisiana’s USDA hardiness zones.
Vegetables To Plant
August in Louisiana is an ideal time to get a head start on your fall garden. With the heat beginning to relent, certain vegetable varieties can thrive in this transitional period. Here are ten vegetables that flourish when planted in August across Louisiana’s climatic regions.
Okra
Okra thrives in the heat, making it perfect for August planting. This warm-season crop can be sown directly into the ground until late summer. Okra prefers well-drained, fertile soil and can tolerate temperatures up to 95°F, though it performs best between 75°F and 90°F.
Plant seeds about 1 inch deep and 3 feet apart, and expect to harvest in about 60 days. Given Louisiana’s long growing season, you can benefit from a succession planting approach, sowing new seeds every few weeks until the end of the month.
Southern Peas
Southern peas, or cowpeas, are well-suited for Louisiana’s climate. August offers a chance to plant varieties like Black-eyed peas or Crowder peas. These plants do well in warm soil and can tolerate high temperatures, making them reliable even in August.
Directly sow seeds an inch deep, spacing them about 4 inches apart. Harvest typically occurs within 60-70 days. They also fix nitrogen in the soil, improving its fertility for subsequent crops.
Collard Greens
For those who enjoy leafy greens, collard greens are an exceptional choice for August planting. They prefer the cooler weather of fall to flourish but can be started in the warmth of late summer. Collards are known for their resilience, tolerating temperatures down to 20°F once established.
Plant seeds ½ inch deep in rows 18 inches apart. Harvest can begin in about 60 days, and they can often be left in the garden through frost, enhancing their flavor.
Lettuce
Lettuce varieties like romaine or butterhead can be planted in August for a fall harvest. While lettuce prefers cooler temperatures, starting them in August allows for a timely harvest as temperatures begin to drop in September. They thrive best between 60°F and 70°F.
Sow seeds lightly in rows, ensuring excellent seed-to-soil contact. Germination occurs quickly, usually within a week, and most varieties mature in about 30-60 days.
Radishes
Radishes are among the fastest-growing crops, making them perfect for quick returns in late summer. They can be directly sown in soil with temperatures between 45°F and 85°F. A traditional choice, the radish can be planted every couple of weeks throughout August to ensure continuous harvest.
Sow seeds about ½ inch deep, spaced approximately an inch apart. With a maturity time of about 30 days, they provide a swift reward.
Swiss Chard
Swiss chard thrives in the warm soil of August and can be harvested continuously once matured. This leafy green tolerates heat and partial shade, which makes it adaptable in Louisiana gardens. It performs best in temperatures ranging from 55°F to 75°F.
Plant seeds directly about 1 inch deep and 12 inches apart. Expect to harvest in about 50-60 days, cutting the outer leaves while allowing the plant to continue growing.
Beets
Beets are another great crop for August planting in Louisiana. These root vegetables do best in cooler weather but can still germinate and grow well when sown in August. They prefer temperatures between 50°F and 75°F but can tolerate the earlier summer heat.
Plant seeds ½ inch deep, with a spacing of about 3 inches between them. Beets take approximately 50-70 days to mature. They can also be consumed at various stages, whether as baby beets or full-sized.
Turnips
Turnips are ideal for late summer planting, as they thrive in the cooler temperatures of fall. They can withstand a range of conditions and are hardy down to 20°F.
Plant turnip seeds about ½ inch deep in well-prepared soil, spacing them 2-4 inches apart. Be prepared for a harvest in roughly 60 days. They can also serve as great companions for other crops like collards.
Carrots
Carrots can also be sown in August to benefit from the cooler fall weather. They require loose, well-draining soil for optimal growth. Carrots prefer temperatures between 55°F and 75°F but can survive in the warmer soil conditions of August.
Plant carrot seeds about ¼ inch deep, ensuring they aren’t overcrowded for healthy growth. Expect to harvest in about 70-80 days, providing continuous pulls of fresh carrots.
Broccoli
August is a perfect month to start broccoli seeds indoors or directly in the garden, as long as you are prepared for the fall weather. Broccoli prefers cooler conditions but can withstand the heat during the initial growth phase in August.
When planting, space seeds 18 inches apart and plant about ½ inch deep. Broccoli typically reaches maturity in about 70-90 days. After planting, keep an eye on moisture levels, as broccoli prefers consistent watering.
These vegetables will not only thrive in Louisiana’s late summer environment but also set you up for enjoyable fall harvests. Each of these options can sustain varying degrees of heat and can adapt well within the state’s different growing zones.
Flowers To Plant
Adding beauty and color to your garden is feasible even in August. Given Louisiana’s climate, there are a variety of flowers that can thrive with the right care. Here are ten flowering plants that will flourish when planted in August.
Marigolds
Marigolds are one of the easiest flowers to grow and are highly tolerant of heat. These annuals flourish in full sun and can handle hot, humid conditions well. Their vibrant shades of yellow, orange, and red bring warmth to any garden.
Plant marigold seeds or seedlings in well-drained soil, spacing them 10-12 inches apart. They bloom quickly, often within 8 weeks of planting. Additionally, marigolds can repel certain pests, making them beneficial companions for vegetables.
Zinnias
Zinnias are popular for their bright, cheerful blooms and are perfect for August planting. These annual flowers do well in full sunlight and are remarkably heat-resistant. They can bloom from summer through fall with the right care.
Plant seeds directly in the ground, spacing them about 12 inches apart. Zinnias germinate quickly and are ready for bloom within 6-8 weeks. They also attract butterflies, adding life to your garden.
Sunflowers
Sunflowers are not only visually stunning but also thrive in warm weather and can be directly sown in August. They prefer full sun and are tolerant of varying soil conditions, making them an excellent choice for Louisiana gardens.
Space sunflower seeds 6-12 inches apart, planting them 1-2 inches deep. Depending on the variety, they can mature in 70-100 days. Once they bloom, they provide food for pollinators and birds alike.
Cosmos
Cosmos are hardy annuals that tolerate heat and poor soil conditions. These flowers bring a delightful array of colors, including pink, orange, and white, to your garden while thriving in sunny spots. They are also known for attracting beneficial insects.
Sow cosmos seeds ¼ inch deep and space them about 12-18 inches apart. They can germinate quickly, typically within 7-14 days, and will bloom within 8-10 weeks, providing long-lasting color throughout the season.
Lantana
Lantana is a perennial that loves heat and thrives in full sunshine, making it a great addition to Louisiana gardens. Known for its clusters of small, multicolored blooms, lantana can attract butterflies and hummingbirds.
Plant lantana in well-drained soil, allowing for plenty of space, about 2-3 feet apart. It is drought-tolerant once established, requiring minimal irrigation. Lantana can bloom continuously through the summer and fall.
Vinca
Vinca is an excellent choice for gardens that want low-maintenance and high tolerance to heat and humidity. Available in a range of colors, this annual flower can thrive in full sun and is reasonably drought-resistant.
Sow vinca seeds about 1 inch apart and ¼ inch deep. It usually takes about 8-10 weeks for vinca to bloom. They are perfect for border plantings or in garden beds for added color.
Salvia
Salvia species, particularly Salvia farinacea (mealycup sage), are perfect for August planting in Louisiana gardens. These perennials can tolerate drought and thrive in sunny locations, adding vibrant blue or purple hues to landscapes.
Plant salvia seeds or plants about 12-18 inches apart in well-drained soil and sunny sites. They bloom within 12-16 weeks and will attract various pollinators.
Impatiens
For shaded areas of your garden, consider impatiens. These flowering plants thrive in partial shade and provide vibrant color to cooler spots during the heat of summer. Though annuals in colder climates, they can be treated as perennials in Louisiana.
Space impatiens about 12 inches apart and plant them about 1-2 inches deep in moist yet well-drained soil. They bloom quickly, often within 4-6 weeks.
Dahlias
Dahlias are prized for their large, bright blooms and can be planted in August in Louisiana. They thrive in warm temperatures and full sun but should be protected from extreme heat during the hottest days.
Plant dahlia tubers about 6-8 inches deep, spacing them 2-3 feet apart. They can take around 90-120 days to bloom and will provide lasting color throughout the summer and fall.
Aster
Asters are perfect for late summer planting, as they bloom into the fall. They prefer cooler temperatures as they start to grow and can handle both full sun and partial shade.
Plant aster seeds about ¼ inch deep and 12 inches apart. They usually take around 90-120 days to bloom, providing a wonderful source of late-season color.
Planting these flowers in August can help create an inviting garden space while providing crucial nourishment to local pollinators. By selecting flowers that suit the Louisiana climate, gardeners can ensure vibrant blooms and resilient plants through fall.
Herbs To Plant
Herbs are invaluable in culinary practices and home gardens. August is suitable for planting various herbs that will flourish in Louisiana’s warm climate. Here are ten herbs to consider.
Basil
Basil is a beloved herb in Louisiana cuisine and can be directly sown during August. This warm-weather annual thrives in full sun and can withstand the summer’s heat, producing aromatic leaves perfect for culinary use.
Plant basil seeds about ¼ inch deep and space them 10-12 inches apart. Germination occurs within 5-10 days, and the herb typically can be harvested in about 60 days.
Cilantro
Cilantro can be planted in late summer for an excellent fall crop. This herb prefers cooler weather but can germinate in the warmth of August, allowing it to mature as temperatures ease.
Direct sow seeds about ¼ inch deep, spacing them 6-12 inches apart. Cilantro grows quickly, with a harvest window of about 30-40 days.
Dill
Dill is another herb that can be planted in August in Louisiana. This hardy annual prefers sunny locations and can grow well in warmer soil conditions. Its feathery foliage is great for culinary use, particularly in pickling and seasoning.
Sow dill seeds about ½ inch deep and 12-18 inches apart. Expect to harvest in 40-60 days. Dill can also attract beneficial insects to your garden.
Sage
Sage is a perennial herb that can be planted in late summer, suitable for Louisiana’s climate. This hardy plant prefers well-drained soil and thrives in full sunlight. It is well-suited for culinary applications, lending flavor to various dishes.
Plant sage seeds or cuttings about 12-24 inches apart, with a planting depth of about ¼ inch. Sage requires attention to watering, especially in hotter months, and can be harvested in about 70-80 days.
Oregano
Oregano will thrive if planted in August in Louisiana. This perennial herb prefers well-drained soil and plenty of sunshine. It’s perfect for adding flavor to Mediterranean dishes and can be grown directly from seed or from starts.
Sow seeds about ¼ inch deep and space them 10-12 inches apart. Oregano can take around 80 days to reach a harvestable size but is usually resilient once established.
Thyme
Thyme is another herb that can flourish late in the season. This perennial prefers well-drained, sandy soil and full sun. It can tolerate high temperatures and is commonly used for seasoning meats and vegetables.
Plant thyme seeds about ¼ inch deep, ensuring they have enough space to spread out (8-12 inches apart). Expect a mature crop in about 80-90 days.
Mint
Mint is a hardy perennial that loves the warm and humid conditions of Louisiana. August is an ideal time to plant mint as it establishes itself quickly and can add delightful flavor to drinks and dishes alike.
Plant mint cuttings or root divisions into well-amended soil, spacing them about 12-24 inches apart. Mint spreads rapidly, so it’s essential to contain its growth as it can take over the garden.
Chives
Chives can be planted in August and are an excellent choice for gardeners looking for easy-to-grow herbs. These perennials appreciate sunlight and consistent watering and can be used as a flavorful garnish or ingredient.
Sow chive seeds about ¼ inch deep, spacing them 8-12 inches apart. They can typically be harvested in about 60 days as they establish their growth.
Tarragon
French tarragon is a perennial herb that thrives in the warmth and can be successfully planted in August. Known for its distinct flavor, it does well in full sun and prefers slightly dryer conditions.
Plant tarragon seeds about ¼ inch deep in well-drained soil, spacing them 1-2 feet apart. Harvest can be expected within about 70-80 days, depending on variety and growing conditions.
Fennel
Fennel is a perennial herb that has similar requirements to dill and can be planted in August in Louisiana. It thrives in full sun and can be harvested for both its foliage and bulb.
Plant fennel seeds about ¼ inch deep, ensuring they’re spaced around 12-14 inches apart to accommodate their size. Expect to harvest in about 80-100 days.
These herbs can enhance your culinary experiences while adding greenery to your garden. Planting them in August allows gardeners to maximize their yields through fall, ensuring a robust herb garden.
Landscape Plants To Plant
Creating a beautiful landscape in Louisiana can be achieved by employing the right species at the right time. August is a fantastic month to add landscape plants that can withstand the heat and flourish throughout the year. Here are ten landscape plants ideal for planting in August.
Texas Sage
Texas sage is a drought-tolerant shrub that thrives in well-drained soil and full sun, making it a superb choice for August planting. This plant is also known to attract pollinators and offer a beautiful display of purple blooms, particularly after rainfall.
Space Texas sage shrubs about 3-4 feet apart and plant them roughly 2 inches deep. They are incredibly resilient and can flourish in the hot southern summers, contributing depth and structure to a garden.
Crepe Myrtle
Crepe myrtle is a popular ornamental tree that thrives in the Louisiana climate. This plant produces stunning summer blooms in shades of pink, red, and white, and its heat tolerance makes August an excellent time for planting.
When planting, space crepe myrtles about 10-15 feet apart, depending on the variety. They prefer full sun and can be established quickly, needing minimal care after planting.
Azaleas
Azaleas are beloved for their vibrant blooms during spring. Planting them in August gives them a chance to establish roots before cooler weather arrives. They prefer slightly acidic soil and thrive well in shaded areas of the garden.
Space azaleas about 3 feet apart, planting them in holes twice the width of the root ball. Proper care and mulching will help these shrubs flourish through Louisiana’s climates.
Daylilies
Daylilies are perennials that provide beautifully colored blooms throughout the summer. They adapt well to various soil types and conditions and can thrive in full sun to partial shade. August planting allows them to establish roots for stronger growth next season.
Daylilies should be spaced about 1-3 feet apart, depending on the variety. Plant them at the same depth they were growing previously, and they will reward you with vibrant colors.
Liriope
Liriope, or monkey grass, is a versatile ground cover that can thrive in a range of conditions, from sunny to shaded areas. This perennial is perfect for August planting and is often utilized for borders and edging in landscapes.
Plant liriope about 12 inches apart, covering its roots lightly with soil. It grows steadily and adds a lush green texture while producing purple-flowered spikes.
Gardenias
Gardenias are classic southern landscape favorites known for their fragrant white blooms. They benefit from being planted in August, giving them ample time to develop roots before winter. They thrive in well-drained, rich soil and prefer partial to full sun.
Space gardenias about 3-4 feet apart and place them at a depth that matches their root ball. Maintenance is essential; providing consistent moisture, particularly in hot weather, is crucial.
Holly Fern
Holly fern is a shade-loving perennial that can add lush greenery to shaded areas of your landscape. It thrives in well-draining soil and adds texture and foliage throughout the year.
Plant holly fern at the same depth as it was in its previous container, spacing them about 1-2 feet apart. Water regularly, especially during dry spells, to encourage healthy growth.
Knock Out Roses
Knock Out roses are hardy, disease-resistant, and bloom continuously throughout the growing season. Planting them in August will allow them to establish roots before the cooler fall months. They thrive in full sun and are low-maintenance, making them perfect for any garden.
Space Knock Out bushes about 3-5 feet apart based on the variety. Once established, they require little attention aside from watering and occasional pruning.
Yaupon Holly
Yaupon holly is a small evergreen shrub known for its adaptability to Louisiana’s varying climates and ability to attract birds with its berry production. Planting in August gives it the chance to establish roots before tougher conditions arrive.
Plant yaupon hollies about 3-4 feet apart in moist, well-draining soil. Expect them to thrive in sun or shade, making them versatile for landscape design.
Canna Lily
Canna lilies are tropical-looking plants that thrive in warm Louisiana climates. These perennials are perfect for adding a splash of color to your landscape through their vibrant blooms.
Plant canna tubers about 4-6 inches deep, spaced 2-3 feet apart. They are quick to establish and will provide towering blooms throughout the summer months.
By planting these landscape plants in August, you can enhance your garden environment and create a lush, inviting space. Each of these options is well-suited to the unique climate of Louisiana, ensuring you enjoy a vibrant landscape year-round.
