Garden care

How to prepare and establish a new garden bed

Creating a beautiful outdoor space is one of the privileges of having your own home, where you can literally put down some roots.

If you’ve inherited a well established garden, most of the hard work is done for you although you may want to make some modifications.

But if you’re starting from scratch, here’s our easy step by step guide to preparing a new garden bed and establishing your own piece of paradise.

Step by step guide to preparing a new garden bed

Here are our five simple steps:

Mark out the beds
Remove existing lawn and plants
Work the soil
Improve your soil
Plant!

1. Mark out the beds

Using your plan (or napkin sketch) mark out the new garden beds.

Use a flexible garden hose to outline the beds. Tweak until you are happy with the shape and depth of them.
Use a spot marker (paint can) to trace around the hose, marking the outer limit of the beds clearly.

2. Remove existing lawn and plants

There are several ways to clear away existing lawns and weeds; the decision comes down to doing it by hand or using a herbicide.

Removing by hand involves digging up the garden beds and pulling all the weeds and sprigs of grass from the soil. It is important to get as much of the existing plant material out of the soil as possible, otherwise plants regrow.
You could also lay black plastic over the new gardens beds and letting the sun cook the plants and heat treat the soil to kill roots and seeds.

3. Work the soil

Using a spade, dig the soil over to a depth of at least a spade and a half. This helps open up the soil to improve air and water penetration.

Don’t be too fussy at this stage, just break it up roughly as the next step will involve turning the soil again.

4. Improve your soil

All soils can be improved with the addition of organic matter.

Spread compost and sheep pellets over your new garden beds and use a garden fork to turn into the soil. This helps to not only break up the existing soil, but incorporate the organic matter throughout the soil profile.
Be generous - this is the easiest time to really improve your soil, while the beds are empty.
If your soil has a high clay component, add gypsum now too. This will help break up the soil and keep it open.

What's next?

Now you’re ready to plant. Learn more about the next step.

FAQs

How do I prepare a garden bed for planting shrubs and vegetables?

To prepare a garden bed, clear weeds and debris from the area, then loosen the soil with a fork. You can apply compost for added nutrients. For clay soils, mix in gypsum; for sandy soils, add organic matter. Rake the bed level and water well before planting.

How do I make a garden bed in the ground?

Mark out your bed, remove grass or weeds, and dig a hole about 30cm deep. You can improve the soil by adding compost and fertiliser. If drainage is poor, you can create raised edges with untreated wood or bricks. Apply mulch to retain moisture and suppress weeds before planting.

What do you put in a garden bed before soil?

Before adding soil, layer organic matter like compost, aged manure, or straw to improve drainage and fertility. If the ground is compacted, add gypsum for clay soils or sand for heavy drainage issues. A layer of cardboard or newspaper can suppress weeds before filling with quality soil.

What is best to put on soil before planting?

Before planting, enrich your soil with compost, aged manure, or slow-release fertiliser to boost nutrients. Mulching with straw or bark helps retain moisture and suppress weeds. If you’re planting vegetables, test pH levels and adjust with lime (for acidic soil) or sulphur (for alkaline soil).

How do you prepare soil for a vegetable garden NZ?

Loosen soil to about 30cm deep and remove weeds. Mix in compost and well-rotted manure to improve fertility. In clay-heavy areas, you can add gypsum to improve drainage. Test the soil’s pH and adjust if needed. Water thoroughly before planting to help nutrients settle.