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How to Create Soil for a Garden

Updated on February 5, 2013

Easy Ways to Improve Soil Quality

Cutting down cover crops & working them into the ground is one way to improve tilth, the physical condition of soil.
Cutting down cover crops & working them into the ground is one way to improve tilth, the physical condition of soil. | Source


Garden soil isn't just—well, dirt. Soil is a dynamic ecosystem made up of four things plants really, really like: minerals, organic material, water and air.

Although there's at least one thing about soil that you can't change (its texture), there are several aspects of your garden's soil that you can improve.

Soil Texture v. Soil Structure

The texture of garden soil— that unalterable mix of clay, silt and sand-sized minerals in soil—is often a gardener's bugaboo. How often have you heard a would-be gardener say, "Nothing will grow in this soil!"

If you live in the U.S., you probably have either sandy soil that leaches nutrients or clay soil that's hard as a rock.

The soil in my garden is sandy clay but, like most gardeners, I'd prefer rich, crumbly loam. However, soil texture is what it is, and my garden's soil will always be sandy clay, no matter what I do it or what I add to it.


Loam is the growing medium most home gardeners can only dream about, a combination of clay, sand & silt that drains well while retaining nutrients & allowing plants to root easily. Loam is a welcoming environment not only to plants, but also to the organisms that live in soil as part of its healthy ecosystem.

Typical garden soil isn't loam, but ... that's okay. With a little hard work, you can fake it!

That doesn't mean, however, that I can't make my soil better. I can.

And so can you.

Soil structure can be improved.

From Crummy to Crumbly

Soil structure refers to the way particles of soil are arranged. The best arrangement is a "crumbly," friable one anywhere from 1 to 2-feet deep that holds onto nutrients while easily allowing water and roots to pass through. This sort of soil provides a welcoming home to decomposers and other friendly organisms.

When creating (or rather, re-creating) the soil in your garden, that's what you should strive for: organically and biologically-rich, "crumbly" soil—a sort of faux loam.

So how can your soil go from crummy to crumbly? Through the addition of organic material.

Increasing the amount of organic matter in garden soil not only improves its structure, but it also increases its fertility. Most organic matter tends to bring soil pH to a neutral level, making nutrients in the soil more accessible to plants.


Oats & other cover crops are called green manure.
Oats & other cover crops are called green manure. | Source

Green Manure

Green manure refers to low-maintenance cover crops gardeners can dig into the ground.

Green manures add nutrients to the soil, attract beneficial insects, reduce erosion, smother weeds and improve the soil's physical state (tilth).

Because I mix vegetables, flowers and ornamental plants within my home landscape, I plant cover crops over small areas in my flowerbeds and raised beds. They're a pretty way to fill up the "blank" spots, and they're a great way to add nitrogen to the soil and improve its structure.

Outsidepride Crimson Clover Seed: Nitro-Coated, Inoculated - 10 LBS
Outsidepride Crimson Clover Seed: Nitro-Coated, Inoculated - 10 LBS

To give soil the biggest boost, crimson clover should be turned under before it blooms, but ... the flowers are so pretty, that may be tough to do!


How to Make Green Manure

Using green manure in the home garden isn't difficult. Here's an easy way to go about it:

  • Purchase seeds of the cover crop of your choice. You'll need about a quarter pound of seed for every 100 square feet of planting area.
  • Scatter the seeds over soil that you've prepared by working in compost and removing weeds and debris.
  • Rake the seeds into the soil and moisten the planting area.
  • If where you live is experiencing drought or drought-like conditions, water the germinating seeds occasionally. (You could even spread straw over the growing area.) But you really don't have to baby cover crops. They're low maintenance and should sprout and grow easily.
  • Before the cover crop sets seeds (and in some cases, before it flowers) mow it down. If, like me, your cover crops are in a mixed bed or potager, cut them down with garden shears, pruners or a hedge trimmer. Then cut the felled plants up into smaller pieces and allow them to dry where they fall for a few days.
  • Once the bits of cover crop have dried up, gently work them into the soil with a cultivating fork.
  • In about a month, you'll be able to replant the freshly green-manured area.


What's in your weed bucket? Annuals like pokeweed can be chopped up & used as mulch.
What's in your weed bucket? Annuals like pokeweed can be chopped up & used as mulch. | Source

A Selection of Green Manures

Cover Crop
Likes warm weather. Sow in spring or summer.
Alsike Clover
Biennial cover crop. Likes cooler weather. Has deep taproots that aerate soil.
A quick grower. Sow in spring or summer.
Annual crop cover. Fast growing. Aerates soil. Also called blackeyed pea.
Crimson Clover
Sow in spring, summer or fall. Turn it under before it blooms.
Fava Beans
Prefers cooler weather. Somewhat drought tolerant. Has pretty purple flowers.
Fast grower. Sow in winter & turn under in mid-summer.
Hairy Vetch
Sow in late summer or fall. Turn it under when it blooms.
Sow in spring, summer or fall. Let frost kill it, & then turn it under in the spring. If you've ever grown "cat grass" from the pet store, you've probably planted oats.
Red Clover
Quick grower that suppresses weeds.
Russian Comfrey
Perennial. Sow in autumn or early winter & turn under spring. Leaves may be used to make liquid fertilizer.
Rye (Annual & Winter)
Sow in later summer or fall. Hardy grower & weed suppressor. Till under annual rye when about 10" high.
Suppresses weeds. Easy to grow.
Winter Tares
May use foliage as mulch. Sow in fall or early winter.
Before selecting cover crops, do a bit of research to see which ones grow best where you live.

Incorporating Other Organic Matter into Soil

Adding organic matter to garden soil sort of "opens it up," improving the soil's air flow and increasing its ability to retain nutrients and moisture while simultaneously improving drainage.

Rather than adding organic matter all at once, apply it twice a year— once in the fall and once in early spring.

If you're starting a new garden or your soil is especially poor, add 4 to 8 inches of organic matter to it each year for 2 years. By the third year, 1 to 2 inches should be enough.

Green manure is one simple way to add organic matter to your soil, but there are many others that are just as easy.


Whether it's store-bought or homemade, compost is one of the best ways to improve garden soil. You can work it into your soil any time of year, so long as the ground isn't frozen. You can also use compost as a mulch around vegetables and herbs, or apply it as a top dressing over your entire garden. So that it doesn't wash away, a light covering of 1 to 2 inches of compost at a time is usually best.

Shredded bark & wood chips

Wood chips and bark are good additions in ornamental flowerbeds as mulch. Not only are they decorative, but they also decompose slowly.

Spent plants, annual weeds, grass clippings & leaves

When plants reach the end of their life cycle, you can chop them up and dig them into your soil or use them as a mulch. (Just be sure that you don't use diseased plants. If you do, you'll spread the infection.)

You can add chopped up annual weeds that haven't gone to seed to your soil as well.

Common annual weeds that make good organic additions to soil include chickweed (Stellaria media), henbit (Lamium amplexicaule), red deadnettle (Lamium purpureum), carpetweed (Mollugo verticicillata), horseweed (Conyza canadensis), common purslane (Portulaca oleracea), prostrate spurge (Eurphorbia supina), knawel (Scleranthus annuus), hairy bittercress (Cardamine hirsuta), common groundsel (Senecio vulgaris), common ragweed (Ambrosia artemisiifolia), redroot pigweed (Amaranthus retroflexus), common pokeweed (Phytolacca americana) and Asiatic dayflower (Commelina communis).

Grass clippings and chopped leaves may also be added to your soil. Pine needles make a particularly good mulch for acid-loving plants like blueberries, azaleas and rhododendron.

Plant roots

When annuals die down, rather than pulling them out of the ground, cut them off at the base, leaving the roots behind to decompose and enrich the soil.

Aged manure

Like compost, aged manure can be worked lightly into the soil, used as a light top dressing or applied more heavily as mulch.

Many experts recommend that composted manure comprise no more than 25 percent of the total organic matter applied to a garden within the course of year. (Dog and cat manure, which contain harmful pathogens, should not be used, especially in an edible garden.)


Often gardeners use straw to protect plants from cold weather, but it's also a good mulch for improving tilth because it aerates the soil as it rots. Hay will do the same; however, it often contains weed seeds, and who wants that?



Usually, adding organic matter to soil eventually brings the pH level at or near neutral, which is where it should be for most plants.

If, despite diligent applications of organic matter, your garden soil's pH is still too high (alkaline), amend it with sulfur. If the pH is too low (acidic), add lime.

Loosening the Soil

For the most part, a no-till garden that's regularly mulched with organic matter and/or planted with cover crops will have the healthiest, richest, most productive, loamiest, crumbliest soil—the soil you want.

However, unless you practice raised bed gardening and/or container gardening exclusively, sometimes you may need to dig down deep into the soil in order to improve tilth.

Although recent research shows that tilling and/or digging deeply into an established garden is counterproductive, it's still appropriate for new gardens as well as old ones that are in very poor condition.

Digging and tilling will allow you to remove debris and loosen the soil, preparing the way for future plantings. In most cases, working the soil to a depth of 12 inches is adequate.

Clay Soil

In cool climates, digging heavy clay soil in the fall is particularly effective. Over the winter, frosts and freezes will break it down, improving its tilth.

Clay & Sandy Clay Soil

If you have heavy clay or sandy clay soil, dig manure into your garden in the fall.

If the soil is very heavy, dig it first and then cover it with a thick layer of composted manure. Over the winter, earthworms will work the manure into the ground, improving the soil's drainage and fertility.

To hole compost, dig a hole 12 to 18 inches deep, dump the contents of your compost bucket into it & cover it up. It's that simple!
To hole compost, dig a hole 12 to 18 inches deep, dump the contents of your compost bucket into it & cover it up. It's that simple! | Source

Sandy Soil

If your garden soil is sandy, lightly turn it in the fall and cover it with composted material or plant it with green manure. Either one will help to prevent the leaching out nutrients over winter.

Digging Potagers, Flowerbeds & Raised Beds

If you're like I am, you actually enjoy digging in the garden. Fortunately, you can do so (even in an established garden) without disrupting the soil's ecosystem too much by trench or hole composting.

It's also okay to dig into the empty areas of your garden that are left when plants die or are removed. That's the perfect time to work compost or composted manure into the ground before replanting.

Copyright © 2012 by The Dirt Farmer. All rights reserved.



The Dirt Farmer has been an active gardener for over 30 years.

She first began gardening as a child alongside her grandfather on her parents' farm. Together, they would plant acres of vegetable gardens, setting tomato, eggplant and bell pepper plants; sowing row after row of beans and corn; and building up mounds of soil for white squash, pumpkin, cantaloupe and potatoes.

Today, The Dirt Farmer gardens at home, volunteers at community gardens and continues to learn about gardening through the MD Master Gardener program.


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    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Hi adjkp25! Thanks for reading & commenting. You bring up another good point about soil--it's important to take into consideration what you want to grow. Take care, Jill

    • adjkp25 profile image


      7 years ago from Idaho

      We have the misfortune of having very hard clay. After years of working horse and chicken manure into our garden area the soil is pretty good for our gardening needs.

      Not everyone understands what kind of soil they have but after reading this piece they should.

      Voted up and useful

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Fantastic, mvillecat. I'd love to do that--or something like it. We have a Baywise program here in MD. The CBYH is a national program, isn't it?

    • mvillecat profile image

      Catherine Dean 

      7 years ago from Milledgeville, Georgia

      Great Hub with lots of useful information. Our property is a Certified Backyard Wildlife Habitat and we garden for native animals. We have recently started vegetable gardening to provide fresh food for our family. We compost everything possible and it has rewarded us greatly.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Hi Timely! I'm a big zinnia fan, too! They're such cheerful flowers. Glad we found each other on the Hub. Take care, Jill

    • Timely profile image


      7 years ago from United States

      The Zinnia is what brought me to your hubs! This is my second year planting them from seed and what a beautiful flower they are. Your article on soil is most helpful. My soil is mostly sand and this year the bed was supplemented with dirt from a field. Neeedless to say my Zinnias still have thrived, but next year the beds will be supplemented with many of your suggestions. Glad I found your hubs!

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Hi Farmer Rachel. In our zones, I think hairy vetch can be invasive too--but it's so pretty I don't think I'd care! Thanks for you comments. I did work hard on the hub. Later, Jill

    • Farmer Rachel profile image

      Rachel Koski 

      7 years ago from Pennsylvania, now farming in Minnesota

      Jill, this is a wonderful Hub! You obviously put a lot of time and effort into this one, and it shows. I especially liked your explanation of cover crops, as I'm a big believer in them myself. Last year, though, I mistakenly used rye grass as a cover because I waited so long to buy more crimson clover that the price had skyrocketed -- never again! What a difficult, insedious plant to get rid of... Loved the hub, voted up :)

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Thanks, Maren. Working on #7 now. Aargh!!! I am so slow!

    • Maren Morgan M-T profile image

      Maren Elizabeth Morgan 

      7 years ago from Pennsylvania

      Great article. I am going to print it out to put into my (paper) gardening file.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      mslizzee! It's great to see you on HubPages again! Hope you're doing well. Thanks for commenting! --Jill

    • mslizzee profile image


      7 years ago from Buncombe County, NC

      this is wonderful information.Thank you. I'm going to archive it for when I start my vegetable garden.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      7 years ago from United States

      Hi Chin chin! Hope you do come back! Thanks for stopping by.

    • Chin chin profile image

      Chin chin 

      7 years ago from Philippines

      I'd better read this again later. There's so much info in here and I really would like to learn how to grow a garden. Am just very busy now. Thanks for sharing.


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