Raised Bed Garden in a Small Lawn: Size, Soil Fill and Bricks (Video)

Transcript

120 cm wide: the sweet spot for a raised bed?

120 cm wide: the sweet spot for a raised bed?

Start Gardening

In this quick guide you'll learn how to turn a tiny patch of lawn into a productive raised-bed garden, from picking the right dimensions to mixing the perfect soil, and stick around because the trick that saves you a ton of soil shows up right at the end.

Size matters

The width is the real game-changer, keep it around 120 cm so you can reach the middle from either side without stepping on the soil, and you’ll keep the soil loose. Length can be as long as your yard allows, a common 240 cm works nicely. Height between 25 and 45 cm gives enough room for most veggies, and if bending is tough, go a bit higher.

Soil needed

A 2.4-meter by 1.2-meter bed filled to a depth of 30 cm holds about 0.86 cubic metres of soil, roughly the volume of a large kitchen trash bin. Knowing that number lets you order just enough topsoil and compost, avoiding costly waste plus a little extra for settling.

Soil mix

Think of the bed as a giant pot, you need a light, airy mix. Aim for fifty to sixty percent good topsoil, thirty to forty percent compost or leaf mould, and ten percent coarse material like rice husk or coco chips. This combo holds moisture but stays fluffy, plus a dash of sand for extra drainage.

Bottom third trick

If your bed is taller than forty centimeters, fill the lowest third with twigs, chopped branches, dry leaves and straw, then give it a good soak before adding the soil mix on top. The organic layer breaks down slowly, feeding the plants and saving you a lot of purchased soil, and you’ll notice less watering needed later.

Brick count

To keep the walls sturdy, calculate the perimeter, a 2.4-by-1.2-meter rectangle gives about 7.2 meters. With standard bricks covering roughly 24 cm each, you’ll need around thirty bricks, plus a little extra for cuts, and a level base prevents future cracks. This quick math stops surprise costs at the supplier.

The one tip to avoid

The single most effective habit is to start every raised-bed project with the bottom-third trick, it cuts your soil purchase by up to half, improves drainage, and creates a slow-release food source for microbes. Do it once, and you’ll see healthier plants without the extra expense, plus you’ll save time re-fertilizing each season.

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Read the full guide

The full guide is on thecareonline.com. General information only, so check with your doctor for your own case.