Whether you’re looking to grow vibrant vegetables, fragrant herbs, colorful flowers, or splendid landscape plants, this month is an essential time for sowing seeds and planting seedlings. Let’s explore an array of plants that can be successfully cultivated in Southern California in August, delving into USDA hardiness zones, temperature tolerances, and more.
Vegetables To Plant
August is an excellent month to start planting a variety of vegetables that can thrive in Southern California’s warm weather. The following vegetables are well-suited for planting in August, allowing for a bountiful fall harvest.
Tomatoes
Tomatoes are one of the most popular vegetables to grow in Southern California, and there are varieties that can be planted in August. When planting tomatoes, consider heat-tolerant varieties such as Celebrity, Heatmaster, and Solar Fire, which can withstand higher temperatures and produce fruit even during the heat of summer.
Temperature Tolerance: Tomatoes thrive in temperatures between 70°F and 85°F but can tolerate up to 100°F with adequate water.
Planting Dates: While many gardeners start tomatoes in the spring, August is an excellent time for a second planting of fast-maturing varieties, especially in USDA zones 9-10.
Bell Peppers
Bell peppers are another heat-loving plant that does well when planted in August. They come in various colors, including green, red, yellow, and orange. By sowing seeds or transplanting seedlings in August, gardeners can expect a productive fall yield.
Temperature Tolerance: Ideal growing temperatures for bell peppers range from 70°F to 90°F.
Planting Dates: August is a good time to plant in USDA zones 9-10, particularly for gardeners looking to enjoy peppers through late fall.
Cucumbers
Cucumbers grow rapidly and can yield a substantial harvest when given the right conditions. Planting them in August allows for harvesting in the cooler months.
Temperature Tolerance: Cucumbers thrive in warm weather, with optimal growth occurring between 70°F and 85°F.
Planting Dates: This summer crop can be sown or transplanted in USDA zones 9-10 during August to ensure a late fall harvest.
Zucchini
Zucchini, a prolific producer, can be planted in August to take advantage of the remaining warm weather. Varieties such as Black Beauty or Costata Romanesca are popular choices among gardeners.
Temperature Tolerance: Zucchini grows best in the 70°F to 90°F range.
Planting Dates: Zone 9-10 gardeners can start zucchini in August, providing a quick turnaround before the frost sets in.
Green Beans
Green beans are productive and easy to grow, making them ideal for novice and experienced gardeners alike. Planting bush varieties such as Blue Lake or Kentucky Wonder in August is a great choice.
Temperature Tolerance: Beans prefer temperatures between 60°F and 85°F.
Planting Dates: In USDA zones 9-10, beans planted in August can produce a generous harvest in the fall.
Carrots
Carrots can be sown in late summer to provide a harvest well into the cooler months. They are a great addition to your fall garden.
Temperature Tolerance: Carrots thrive in cooler temperatures, ideally between 60°F and 75°F, and can withstand light frost.
Planting Dates: In zones 9-10, August is perfect for sowing carrot seeds for a fall harvest.
Lettuce
Lettuce can handle the heat if provided with some shade, making August a suitable time for planting heat-resistant varieties like Butterhead or Romaine.
Temperature Tolerance: Lettuce prefers cooler temperatures, ideally around 60°F to 70°F.
Planting Dates: In USDA zones 9-10, lettuce can be sown in mid to late August, taking advantage of the cooler nights as fall approaches.
Beets
Beets are another resilient root vegetable perfect for late summer planting. They can thrive in various soil conditions, making them versatile for different garden environments.
Temperature Tolerance: Beets prefer temperatures ranging from 60°F to 75°F.
Planting Dates: Plant in August for a fall harvest in USDA zones 9-10.
Radishes
Radishes are quick-growing vegetables that can be planted in August for a fast turnaround. Varieties such as Cherry Belle or French Breakfast can be enjoyed within a month.
Temperature Tolerance: Radishes thrive in cooler temperatures, ideally 50°F to 70°F.
Planting Dates: In zones 9-10, you can sow radish seeds in early to mid-August for a successful harvest.
Spinach
Spinach is a nutrient-rich leafy green that is well-suited for planting in the cooler temperatures of late summer. It responds well to the conditions found in Southern California during this time.
Temperature Tolerance: Spinach grows best in temperatures ranging from 50°F to 70°F.
Planting Dates: In USDA zones 9-10, spinach can be planted from mid to late August for a fall bounty.
Flowers To Plant
In addition to vegetables, August is a wonderful time for planting vibrant flowers that can add color to your garden through fall. The following flowers are perfect candidates for sowing or transplanting this month in Southern California.
Marigolds
Known for their bright hues and pest-repelling properties, marigolds are an excellent addition to any garden. They add a cheerful touch to both vegetable and ornamental gardens.
Temperature Tolerance: Marigolds thrive in warm temperatures, ideally between 70°F and 85°F.
Planting Dates: August is perfect for sowing marigold seeds or transplanting seedlings in USDA zones 9-10.
Sunflowers
Sunflowers are not only a stunning sight but also attract pollinators to your garden. They come in various heights and can produce seeds that are great for wildlife.
Temperature Tolerance: Sunflowers thrive in warm temperatures and dry conditions.
Planting Dates: August is an ideal time to sow sunflower seeds in Southern California gardens.
Cosmos
Cosmos are vibrant, easy-to-grow flowers that can flourish in poor soils, making them ideal for all garden types. Their fern-like foliage and bold blooms provide a delightful contrast to other garden plants.
Temperature Tolerance: Cosmos prefer a warm climate and can tolerate dry spells.
Planting Dates: August is the perfect time to sow cosmos seeds in USDA zones 9-10.
Asters
Asters add a pop of color to autumn gardens, attracting butterflies and beneficial insects. Their diverse colors and shapes make them versatile for different garden styles.
Temperature Tolerance: Asters prefer cooler temperatures but can establish robust root systems in warm weather.
Planting Dates: August is a suitable month for planting asters in Southern California.
Snapdragons
Snapdragons are delightful flowers that can add a spectacular display of color to garden beds. They prefer cooler weather and can create a stunning fall landscape.
Temperature Tolerance: Snapdragons thrive best in mild temperatures between 60°F and 70°F.
Planting Dates: Plant snapdragons in August for flowers that bloom in the late fall or early winter.
Salvia
Salvia, known for its vibrant blue and purple flowers, attracts hummingbirds and butterflies. It’s drought-tolerant and thrives in Southern California’s climate.
Temperature Tolerance: Salvia prefers warm and dry conditions.
Planting Dates: August is a suitable planting time in USDA zones 9-10.
Petunias
Petunias are versatile flowering plants that bring joy to any garden. They bloom from spring until frost, making them a favorite for late-summer planting.
Temperature Tolerance: Petunias thrive in warm temperatures.
Planting Dates: You can plant petunias in August for an extended fall bloom in Southern California.
Ornamental Kale
While typically grown for foliage, ornamental kale adds stunning color and texture to autumn gardens. It can withstand cooler temperatures as the fall progresses.
Temperature Tolerance: Ornamental kale prefers cooler temperatures, ideally between 60°F and 70°F.
Planting Dates: In Southern California, August is ideal for adding ornamental kale to your landscape.
Zinnias
Zinnias are among the easiest flowers to grow and come in a vast array of colors. They’re excellent for attracting butterflies and can thrive in poor soil.
Temperature Tolerance: Zinnias thrive in warm weather and full sun.
Planting Dates: August is an excellent time to sow zinnia seeds in USDA zones 9-10.
Herbs To Plant
Herbs add flavor to culinary dishes and beauty to gardens. They also tend to thrive in the warm weather prevalent in Southern California. Here are some herbs you can plant in August.
Basil
Basil is a heat-loving herb that can enhance nearly any dish with its robust flavor. It thrives in sunny conditions and is a favorite for summer cooking.
Temperature Tolerance: Basil prefers temperatures between 70°F and 85°F.
Planting Dates: Sowing basil seeds in August allows for an extended harvest into the fall in USDA zones 9-10.
Oregano
Oregano is a perennial herb known for its flavorful leaves, commonly used in Mediterranean cuisines. It is drought-tolerant, making it ideal for the Southern California climate.
Temperature Tolerance: Oregano thrives in warm temperatures but can stand a bit of cooler weather once established.
Planting Dates: August planting works well for oregano in zones 9-10.
Chives
Chives are hardy, perennial herbs that can add a subtle onion flavor to dishes. They grow well in various garden conditions and can quickly establish themselves.
Temperature Tolerance: Chives prefer cooler temperatures but can handle warmer conditions once established.
Planting Dates: August is suitable for planting chives in Southern California.
Thyme
Thyme is a low-growing, hardy herb that produces aromatic leaves for cooking. It’s drought-tolerant, adding to its appeal for Southern California gardens.
Temperature Tolerance: Thyme enjoys warm conditions and can thrive in temperatures up to 90°F.
Planting Dates: Plant thyme in August to harvest through the fall in USDA zones 9-10.
Cilantro
Cilantro is a fast-growing herb that can be sown for a quick harvest. It is great for adding freshness to various dishes, particularly in Latin cuisine.
Temperature Tolerance: Cilantro prefers cooler temperatures but can be sown in August as the heat begins to wane.
Planting Dates: Southern California gardeners can plant cilantro in mid to late August for a successful fall yield.
Dill
Dill is an aromatic herb often used for pickling and flavoring dishes. It’s also attractive in the garden, with its feathery leaves and yellow flowers.
Temperature Tolerance: Dill thrives in warm climates but prefers a bit of humidity.
Planting Dates: August is a good time to plant dill for a fall harvest in USDA zones 9-10.
Mint
Mint is a perennial herb that spreads quickly and can be used in a variety of dishes and beverages. It prefers well-drained soil and can handle a variety of temperatures.
Temperature Tolerance: Mint grows well in temperatures up to 90°F.
Planting Dates: August planting works well for mint, providing it with enough warmth to establish roots.
Parsley
Parsley is a versatile herb that can enhance the flavor of many dishes. Both flat-leaf and curly leaf varieties can be planted in August.
Temperature Tolerance: Parsley grows best in cooler temperatures but is resilient enough to grow in warmer weather as well.
Planting Dates: Gardeners in Southern California can successfully plant parsley seeds in August.
Lemongrass
Lemongrass is a tropical herb that can be planted in more sheltered areas of Southern California gardens. Its citrusy flavor is perfect for enhancing soups, teas, and curries.
Temperature Tolerance: Lemongrass prefers warm weather and does not tolerate frost.
Planting Dates: Plant lemongrass in August to ensure strong growth at the onset of cooler weather.
Landscape Plants To Plant
Creating an attractive landscape involves choosing the right plants for aesthetic value and resilience in the Southern California climate. August is a great month for selecting landscape plants.
Agapanthus
Agapanthus, also known as African blue lily, provides striking blue or white flowers during the summer and fall. They thrive in full sun and add color to borders and gardens.
Temperature Tolerance: These plants thrive in warm temperatures and are drought-tolerant once established.
Planting Dates: Plant in August for blooming in late summer to fall.
California Poppy
The California poppy is a native flower that blooms in vibrant orange hues. It thrives in poor soil and is drought-resistant, making it a perfect choice for sustainable landscapes.
Temperature Tolerance: The California poppy does well in various temperatures but prefers warmer conditions.
Planting Dates: August is an excellent time to sow seeds for a beautiful display in spring.
Lavender
Lavender is cherished for its fragrance and ability to attract beneficial pollinators. It’s drought-resistant and can tolerate heat well, making it suitable for southern landscapes.
Temperature Tolerance: Lavender thrives in temperatures ranging from 70°F to 85°F.
Planting Dates: Plant lavender in August for blooms that add color and fragrance through the fall.
Salvia
Salvia is not only an attractive addition to any garden with its myriad of colors but is also a resilient plant that can withstand Southern California’s heat.
Temperature Tolerance: Salvia does well in warmer conditions and is drought-tolerant.
Planting Dates: August is ideal for sowing salvia seeds or transplanting established plants.
Bougainvillea
Bougainvillea is a hardy, tropical vine with vibrant, papery bracts that add dramatic color to fences and trellises. It is drought-tolerant and thrives in regions with plenty of sunlight.
Temperature Tolerance: Bougainvillea grows best in warm temperatures.
Planting Dates: Plant Bougainvillea in August for vigorous growth during the warm months.
Desert Willow
The desert willow is a stunning tree that produces beautiful trumpet-shaped flowers. It’s well-suited for arid climates and adds elegance to any landscape.
Temperature Tolerance: The desert willow is drought-resistant and thrives in warm conditions.
Planting Dates: August is an appropriate time for planting these trees in Southern California.
Oleander
Oleander is an evergreen shrub known for its stunning flowers and ability to thrive in challenging conditions. It requires minimal water and can withstand coastal conditions.
Temperature Tolerance: Oleander can tolerate hot early summer days but is resilient enough for milder temperatures.
Planting Dates: Plant oleander in August to enjoy vibrant blooms in the subsequent growing season.
Japanese Fern
The Japanese fern is an excellent choice for shaded areas, providing lush foliage that adds texture and depth to landscapes. It requires well-draining soil to thrive.
Temperature Tolerance: This fern grows well in moderate temperatures and prefers humidity.
Planting Dates: August is perfect for planting Japanese ferns in shaded areas of the garden.
Mexican Sage
Mexican sage brings dramatic spikes of purple flowers that attract butterflies and hummingbirds. It’s drought-tolerant and does well in sunny areas.
Temperature Tolerance: Mexican sage prefers warmer temperatures but generally holds up well in varying conditions.
Planting Dates: Plant in August for a colorful late summer display.
Red Yucca
Red yucca is a drought-tolerant perennial that thrives in hot and dry conditions. Its tall flower spikes add an exotic look to gardens.
Temperature Tolerance: This plant can withstand temperatures up to 100°F.
Planting Dates: August is a fitting month to plant red yucca in Southern California landscapes.
