How to Grow Vegetables in Raised Beds

Raised beds are one of the best ways to grow vegetables. You control the soil, drainage is better, and you can garden without bending down as much. Here is how to get started.

Why use raised beds?

• Better soil: You fill them with good quality growing medium, regardless of what your garden soil is like.
• Improved drainage: Water drains freely, so roots do not sit in waterlogged soil.
• Warmer soil: Raised beds warm up faster in spring, giving crops a head start.
• Easier access: Less bending and kneeling, especially if you build them at a comfortable height.
• Less compaction: You never walk on the soil, so it stays loose and well-aerated.

Choosing the right size

The ideal width is about 1.2 metres (4 feet). This lets you reach the middle from either side without stepping on the soil. Length can be whatever suits your space.

For depth, 20-30cm is enough for most vegetables. Deeper beds (45cm or more) are better for root crops like carrots and parsnips, and for people who want to garden at a comfortable height.

What to make beds from

• Untreated softwood: Cheap and easy to work with. Will rot after 5-10 years but can be replaced.
• Treated timber: Lasts longer. Modern treatments are safe for food growing, but avoid old railway sleepers which may contain creosote.
• Hardwood: Oak or larch lasts decades but costs more.
• Bricks or blocks: Permanent and attractive but more work to build.
• Galvanised steel: Modern raised bed kits are durable and look smart.

How to fill raised beds

Filling beds with bought compost is expensive. A better approach is to use a mix:

• Bottom layer: Rough organic matter like woody prunings, leaves, or straw. This breaks down slowly and improves drainage.
• Middle layer: Garden soil, if you have decent quality, or cheap topsoil.
• Top layer: Good quality compost mixed with topsoil. This is where the roots will grow.

The bed will settle over time, so fill it slightly higher than the edges and top up each year with compost.

What to grow

Almost any vegetable grows well in raised beds. Good choices for beginners include:

• Salads: Lettuce, rocket, spinach – quick and easy.
• Beans and peas: Productive and improve the soil.
• Courgettes: One or two plants produce plenty.
• Tomatoes: Bush varieties work well in beds.
• Root vegetables: Carrots, beetroot, radishes.
• Brassicas: Cabbage, kale, broccoli – need netting against pigeons.

Planting tips

• Plant closer: In good soil, you can space plants closer than in open ground.
• Succession sowing: Sow small amounts regularly for a continuous harvest.
• Interplanting: Grow quick crops like radishes between slower ones like cabbages.
• Rotate crops: Do not grow the same family in the same bed year after year.

Watering and feeding

Raised beds drain well, which means they can dry out faster than ground-level beds. In dry weather, check the soil regularly and water when the top few centimetres are dry.

Add compost or well-rotted manure each year to maintain fertility. A general-purpose fertiliser in spring gives crops a boost, and hungry plants like tomatoes benefit from regular liquid feeding.

Winter care

After the growing season, clear away old plants and add a layer of compost or mulch. This protects the soil and adds organic matter. You can also sow green manures like field beans or phacelia to cover the soil over winter.