Raised bed gardening has earned its reputation. The elevated structure gives you control over soil composition, improves drainage, warms earlier in the season and protects plants from foot traffic. Not every plant is well-suited to this format: sprawling crops that need significant horizontal space and deep-rooted plants that compete aggressively for nutrients are less practical. But for the plants that do suit raised beds, the advantages in growing performance are considerable.

Tomatoes

Tomatoes are the quintessential raised bed plant. They grow vertically, come in an enormous range of varieties and produce abundantly in the full sun and well-drained, nutrient-rich conditions a raised bed provides. There are two types: determinate varieties that reach a set height and produce a concentrated flush of fruit, and indeterminate varieties that continue growing and producing until conditions stop them. Both suit raised beds. In South African conditions, plant from October once frost risk has passed, provide a stake or cage for support, water consistently and feed through the fruiting season.

Marigolds

Marigolds are the companion plant that earns its place in any raised bed through multiple functions. They add vivid colour from yellow through orange to deep red, they fit into gaps to prevent weed establishment, and the roots of true Tagetes species release compounds that reduce nematode populations in the soil. Deadhead regularly for continuous flowering. They grow happily in any well-draining soil in full sun and attract bees, butterflies and other pollinators throughout the summer season.

Peppers

Like tomatoes, peppers are a warm-season crop for SA summers. Plant after the last frost and in full sun. They need consistent feeding, ideally with granular fertiliser supplemented by fish emulsion for plants that are struggling, and should be staked as they develop to prevent summer rain or wind from knocking them over. The range of pepper types, from sweet bell peppers to the extremely hot varieties, all perform well in raised beds with adequate sun and nutrition.

Beetroot

Root vegetables benefit significantly from raised beds because you have complete control over the soil structure. Beetroot needs well-draining, loose, sandy-loam soil that stays consistently moist without becoming waterlogged. Note that each beetroot seed is actually a dried fruit containing multiple seeds, so thinning is necessary as seedlings emerge. Plant in late summer to autumn for a winter harvest in most SA regions. Beetroot greens are edible and nutritious, and some varieties produce particularly large, harvestable leaves.

Basil

Basil is one of the most beneficial companion plants in a raised bed, particularly when grown near tomatoes, where it repels certain pests and, whether by garden folklore or actual effect, is consistently grown together with tomatoes by gardeners worldwide. It attracts bees and butterflies when it flowers. Grow in full sun with consistently moist soil. Pinch growing tips regularly to prevent bolting and maintain leaf production. In SA, basil is a warm-season herb that performs best from October through April.

Kale

Kale is a cool-season crop that is among the first to go into a raised bed in early spring and the last to come out in autumn. It tolerates light frost and grows slowly but steadily, providing ground cover and consistent leaf harvest throughout the cooler months. In SA, kale is at its best between April and September. Grow in full sun for best results, though it tolerates partial shade at the cost of slower growth.

Nasturtiums

Nasturtiums are the ground-covering companion plant with the most functions. Their coin-shaped leaves and vivid orange and yellow flowers cover soil between taller plants, reducing moisture loss and suppressing weeds. They repel whiteflies and aphids and attract bees and butterflies as pollinators. They are both edible: the flowers and leaves are peppery and colourful in salads. They self-seed readily in mild SA conditions, producing volunteer plants in subsequent seasons with no effort.

Radishes

Radishes are the fastest and most space-efficient crop available for a raised bed. You can fit sixteen in a single square foot of bed, and most varieties are ready to harvest in 25 to 30 days. Their small size makes them ideal for filling gaps, growing between slower-maturing crops, or providing quick early-season reward while waiting for the main summer crops to develop. They prefer cool conditions and are best grown in spring and autumn in most SA regions.

Zinnias

If cut flowers are part of the plan for the raised bed, zinnias are among the best choices. Their vivid blooms in pink, red, orange, yellow and white attract bees and butterflies and provide continuous flowers when deadheaded regularly. They need full sun and are warm-season plants suited to SA summer conditions. Their height, typically 60 to 120 centimetres, makes them useful at the back of a bed where they add structure and vertical interest.

Coriander

Coriander is a cool-season herb at its best in the early months of the year and again in autumn, before and after SA’s summer heat causes it to bolt rapidly. When it does bolt and flower, the flowers attract bees and beneficial insects, and the seeds can be harvested as a spice. The challenge is managing the plant through its relatively short leaf-harvest window. Successional sowing every three weeks extends the useful period.

Carrots

Like beetroot, carrots depend on loose, well-draining soil for root development, making raised beds ideal. They need consistent moisture and full sun, though they survive in partial shade at the cost of slower root development. Avoid excess nitrogen, which encourages leaf growth at the expense of the root. Sow from late summer through winter for the best cool-season development.

Bush beans

Bush beans, unlike vining pole beans, need no support and fit naturally into a raised bed without dominating the space. Like all legumes, they fix nitrogen in the soil through their root systems, improving conditions for subsequent crops planted in the same bed. In SA, bush beans are a warm-season crop planted from October once frost risk has passed. Let spent plants decompose in the bed at the end of the season to release their stored nitrogen.

Globe amaranth

Globe amaranth is a warm-season flowering annual with distinctive pom-pom-shaped flowers in purple, red, orange and white that hold their colour when dried, making them as useful in a vase as in the garden. It is low-maintenance and blooms continuously from early summer through to the first cold nights. Butterflies are particularly attracted to it, and it makes an excellent companion plant at the edge of a vegetable bed.

Rainbow chard

Rainbow chard is a cool-season vegetable that is visually striking in a raised bed: the bright stems in orange, yellow, red and cream alongside deep green crinkled leaves make it as decorative as it is productive. It is slow to bolt and can be harvested across the entire cool season. Sow in late summer for a winter-spring harvest. Like kale, it grows slowly and provides consistent ground cover alongside faster-maturing crops.

Dill

Dill is a tall, fragrant herb that attracts bees, butterflies and other beneficial insects when it flowers. The flavour of fresh dill is most intense in the leaves before flowering; once the yellow umbel flowers develop, the aromatic quality shifts toward the seeds, which are also edible and useful in cooking. Plant in spring; it tolerates light frost and provides the garden with a gentle, airy structure at the back of a bed while performing companion planting duties for neighbouring crops.

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