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UC Master Gardeners of Inyo and Mono Counties
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Preparing Your Soil for a Vegetable Garden

Introduction

If there is a secret to gardening it could be world-class, spectacular, super-fabulous soil preparation. If you have failed before, your soil preparation may be to blame. You don’t need a green thumb to have a garden; you need a brown one.

Soil is made of several components:

  • Nutrients

  • Sand, silt, and clay particles in varying proportions

  • Organic matter

  • Water

  • Air

  • Living organisms

Healthy soil has a balance of all of these.

Below is a collection of 10 tips that will help you get started in the Eastern Sierra.

10 Steps to Good Garden Soil

Here are some steps you can follow to get your new garden spot ready to grow vegetables.

1. Pick a Suitable Location

You will need:

  • Sunshine

  • Good drainage

  • Access to water

  • Low traffic

You may want to start small. Leave room between rows to walk.


2. Remove Weeds

Spray weeds with herbicide or manually pull them.


3. Add Organic Matter

Cover the area with a couple of inches of organic matter.

If your soil is heavy clay, you may want to add extra organic matter. You can never have too much organic matter.

Suitable Organic Matter Sources

  • Well-composted manure

  • Composted yard debris

  • Ready-to-use compost

  • Coconut coir

  • Peat moss

  • Pre-made potting mixes

  • Worm castings

Do not use raw manure or plant residue such as straw or sawdust as these can tie up nitrogen.


4. Incorporate Thoroughly

Incorporate organic matter into the soil with a spade or tiller:

  • At least 12 inches deep

  • 18 inches wide if planting in rows

New beds should be at least a couple of inches higher than the old soil grade.


5. Do Not Walk on Prepared Beds

Never walk on your prepared beds. They are called “beds” for a reason. Use a planting board if necessary.


6. Control Weeds

Weeds compete with your plants for nutrients.

Control methods:

  • Pull

  • Hoe

  • Spray

Consider using a “Hula Hoe.”
Be careful when spraying and watch for drift. Most herbicides will kill vegetables. Read the label.


7. Plan for Irrigation

Make sure you can get water to your garden.

If watering by hand:

  • Use a water-breaker

  • Try to keep leaves dry

  • Water early in the day

Put deep, heavy stakes at the end of each row so the hose will not wipe out your crop.

If you must water twice a day, consider using mulch.


8. Fertilizer

You do not need to use a whole bag of fertilizer.

When in doubt:

  • Apply 1 lb of 13-13-13 or 9-9-9 per 100 sq. ft.

  • Apply immediately before planting

There is probably a fertilizer you could be using that better aligns with your actual plant needs. You would likely need a soil test to determine that. Lacking a soil test, this is a general recommendation that will get you started in our area.


9. Consider Raised Beds

If your soil is extremely poor, you may be better off growing in raised beds amended with organic material.


10. Repeat Annually

Next year, do it all again! (Kind of.)

It will be easier next time. Your garden will grow better each year, and the number of weeds will steadily decline if you stay on top of them. You likely won't need so much organic material, and usually less or more gentle tillage is better than more if you have that option.