How to Prepare Garden Soil For Planting

Krista Green
May 12, 2021
3 min read

Updated: Apr 13

Good garden soil is truly the foundation for a successful vegetable garden. Whether you are growing in pots or containers, in a raised bed, or in an in-ground garden, healthy soil is a must for growing healthy vegetable plants. What makes soil healthy? Generally vegetables need well drained soil with a good balance of nitrogen, phosphorus and potash along with other micronutrients and minerals. Let's take a look at a few ways we can prepare our soil for planting vegetables.

How to prepare soil for planting by adding compost, worm castings, peat moss and sand to your soil. A girl holding garden soil in her hands out in her Calgary vegetable garden in zone 3.

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Cold hardy vegetables can be planted as soon as your garden soil is workable. For me in zone 3, just south of Calgary, Alberta, soil tends to be workable sometime in April. Prepare your garden soil for planting once it is no longer frozen and is dry enough to have a crumbly texture.

Ready to prepare raised bed vegetable garden soil for planting seeds.

Recipe for Garden Soil

If you are building a brand new garden, use 1/3 topsoil, 1/3 compost and 1/3 peat moss to create a loose, well drained, healthy soil base for your backyard vegetable garden. If you are growing in pots/containers, use 2/3 high quality soil mix (I like to stick with ProMix or Sunshine Mix - also labelled Sungro. I also use this mix to start my indoor plants.) and 1/3 compost. This soil mix already contains peat moss so there is no need to add that.

This is the potting soil I have been using the last few years.

The Pro Mix Organic Seed Starting Soil is also a great option.

Test Your Soil

I highly recommend testing your garden soil to see what the quality of your soil is. Look for a test kit that tests pH, nitrogen, phosphorus and potash levels. Testing soil each spring and fall allows you to see if the amendments you are making are improving the quality of the soil. Inexpensive test kits can be purchased at most hardware stores that carry garden supplies. Most vegetables prefer slightly acidic soil with a pH of around 6.5. Read more about amending garden soil here.

Remove Weeds

If weeds have begun to grow in your garden area, you want to remove the weeds along with any rocks or sticks prior to planting.

Add Compost

Good compost is packed full of nutritional value for your plants. I like to add compost to my garden both in the spring and the fall. High quality compost should have gotten to a high enough heat that it no longer contains any live weed seeds. Compost contains enough nutrients for most vegetables that don't blossom to produce, no other fertilizer is needed. Fruit and vegetables such as tomatoes, peppers and squash can benefit from added fertilizer.

Adding compost is a perfect way of preparing garden soil for planting vegetables.

Loosen the Soil

We like to rototill the soil in our garden each spring. (I am lucky that my hubby does this for me each year!) If that is not an option, you can use a shovel and a rake to break up soil. Loose soil allows plant and seedling roots to grow easily. This is when I work in compost along with any other amendments I am using. (I often add a bag of peat moss and bone meal for my alkaline soil containing low phosphorus.)

Loosening garden soil by rototilling is a good way of preparing soil for planting vegetables such as tomatoes and potatoes.

Rake the Soil

Go over the surface of the soil multiple times with a garden rake. Gently pull the rake over the surface bringing all the rocks, roots, debris, and lumps of soil into a corner. Remove this pile of debris from the garden leaving fine, smooth soil behind. This fine, smooth soil helps tiny seeds (such as carrot seeds) to be able to push through the top of the soil as well as send roots down into it without being hindered.

Raking garden soil is a good way of preparing soil for planting vegetables such as tomatoes and potatoes.

Plant Your Garden

Now it's time to plant your garden! Find out what cold hardy crops to plant early and what cold sensitive crops to wait on.

Preparing soil for planting vegetables such as tomatoes and potatoes can be done by adding compost, peat moss, amending and tilling your soil.

Other posts you may want to check out to get you started are How to Build a No-Dig Garden and The Best Soil For Raised Beds.

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Preparing soil for planting vegetables like tomatoes and potatoes.

How to prepare garden soil for planting vegetables and flowers in a zone 3 garden.