what to plant in raised bed in august

August's Bounty: Best Plants for Raised Beds

By Sarah RobinsonMarch 30, 2026

As the dog days of summer begin to wane, August presents a unique opportunity for gardeners to plant a variety of crops in their raised beds. With warm days and cooler nights, this month offers ideal conditions for a mix of cool-season and warm-season vegetables. Let's explore what to plant in your raised bed in August for a bountiful harvest.

Raised beds provide several advantages, including better drainage, easier maintenance, and improved soil quality. They also allow you to extend your growing season by providing a warmer environment for plants. By strategically planting in August, you can ensure a continuous supply of fresh produce well into the fall and even winter.

Cool-Season Crops for August Planting

Cool-season crops thrive in the cooler temperatures of late summer and early fall. They can tolerate light frosts and some even prefer cooler temperatures for optimal growth. Here are some cool-season crops you can plant in your raised bed in August.

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Remember to choose varieties that have a shorter maturity period, as days are getting shorter and nights cooler as we approach fall.

Leafy Greens

Leafy greens such as lettuce, spinach, and kale are excellent choices for August planting. They grow quickly and can be harvested within 45 to 60 days. Opt for loose-leaf varieties like 'Black-Seeded Simpson' or 'Red Sails' lettuce, which are more heat-tolerant than head lettuces.

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For spinach, consider 'Space' or 'Bloomsdale' varieties, and for kale, 'Dwarf Blue Curled Scotch' or 'Winterbor' are great choices. Plant seeds directly into the soil, keeping them consistently moist until germination.

Root Vegetables

Root vegetables like carrots, beets, and radishes can be sown directly into the raised bed in August. They prefer cooler temperatures and can withstand light frosts. For carrots, 'Paris Market' or 'Thumbelina' varieties are suitable for smaller raised beds. Beets like 'Detroit Dark Red' or 'Chioggia' can be harvested in as little as 50 days.

Radishes, such as 'Cherry Belle' or 'French Breakfast', grow quickly and can be harvested in just 20 to 30 days. They also help improve soil health by breaking up compacted soil and preventing pests like wireworms.

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Warm-Season Crops for Succession Planting

Succession planting involves replacing warm-season crops that have already been harvested with cool-season crops. This technique allows you to maximize your raised bed's productivity throughout the growing season. Here are some warm-season crops you can plant in August for a fall harvest.

Choose varieties with a shorter maturity period and ensure they have enough time to mature before the first frost.

Fast-Growing Greens

Fast-growing greens like arugula, mustard greens, and turnips can be planted in August for a fall harvest. Arugula, such as 'Roquette' or 'Sylvetta', grows quickly and adds a peppery flavor to salads. Mustard greens like 'Southern Giant Curled' or 'Tendergreen' can be harvested in as little as 45 days.

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Turnips, both the roots and greens, can be harvested within 50 to 60 days. Opt for varieties like 'Tokyo Cross' or 'Purple Top White Globe' for their tender roots and tasty greens.

Quick-Maturing Vegetables

Some warm-season vegetables can still be planted in August for a fall harvest. Bush beans, such as 'Contender' or 'Bush Blue Lake', can be harvested in as little as 50 days. Similarly, cucumbers like 'Spacemaster' or 'Salad Bush' can produce fruit within 55 to 65 days.

For a fall harvest of summer squash, choose varieties like 'Early Butternut' or 'Goldbar' that have a shorter maturity period. Keep in mind that these plants may require additional protection, such as row covers, as temperatures begin to cool.

As you plan your raised bed garden for August, consider the unique advantages that this month offers. By strategically planting a mix of cool-season and warm-season crops, you can enjoy a continuous harvest well into the fall. So, get out there and start planting – your garden (and your taste buds) will thank you!