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5 Tips for a Successful Square Foot Garden

By: Angela Judd | Updated: May 21, 2026

In 2008 I bought my first gardening book, “Square Foot Gardening,” by Mel Bartholomew. I read it cover to cover and then read it again. Square foot gardening principles make gardening easy to understand, with simple steps to help you get started and be successful.

Raised garden beds arranged in a square foot garden style, filled with green vegetables and flowers, surrounded by metal trellises under a partly cloudy sky, with trees and a fence in the background.

I followed Mel’s advice and agree that square foot gardening is the best way to get started and have a thriving home garden. In this post, I’ll share five essential tips to help you have a productive and beautiful square foot garden.

Key Takeaways: Square Foot Gardening

Start small by using a single raised bed for your square foot garden to manage your space effectively.
Follow the directions in gardening guides for optimal planting spacing, raised bed sizes, and soil types.
Utilize vertical space to enhance your square foot garden; it saves room and increases sunlight exposure.
Reference a planting guide specific to your area to determine the best planting times for your crops.
Quickly fill empty squares in your garden by planting new seeds as soon as space becomes available.

What We Will Cover:

1. Start small to have a successful Square Foot Garden
2. Follow the directions to have a successful Square Foot Garden
3. Use vertical space to have a successful Square Foot Garden
4. Follow a planting guide for your area
5. When a square opens up, plant something
A few steps and you’re ready to plant in your empty square:

A square foot garden raised bed filled with leafy green romaine lettuce, carrot tops, and other vegetables is surrounded by mulch and sunlight. Small plant labels are visible among the plants.

1. Start small to have a successful Square Foot Garden

When you begin gardening, it’s easy to get overwhelmed. But, if you start small, it is easier to succeed. Then, as you gain experience, expand your garden.

One 4’x4′ or 4’x 8′ (1.2m x 1.2m or 1.2m x 2.4m) raised bed is a good starting point. You can grow a surprising amount in this size space. Although Mel recommends beds be 6 inches (15 cm) deep, I’ve had the best success with beds between 12-18 inches (30-45 cm) deep.

I use the Deep Root Cedar Beds from Gardener’s Supply and the Metal Raised Garden Bed with Garden Grids from Garden in Minutes in my garden.

Young green bean seedlings sprouting from dark, moist soil in a square foot garden bed, with a black irrigation system visible in the background.

Starting with one bed is manageable, and you can learn as you grow. Later, as your experience increases, you can add more beds.

A square foot garden raised bed with leafy greens, herbs, and purple flowers grows in mulched soil, divided by a black drip irrigation system. Labels on small stakes identify some of the plants.

This 4’x 8′ (1.2m x 2.4m) raised bed has three varieties of peppers, 4 different herbs, carrots, spinach, lettuce, cabbage, onions, flowers, and more.

2. Follow the directions to have a successful Square Foot Garden

A book titled All New Square Foot Gardening by Mel Bartholomew stands upright in a square foot garden bed, surrounded by green leafy plants and soil.

As you read the book All New Square Foot Gardening, Mel gives specific advice about:

The importance of using a grid
Proper planting spacing guidelines
Optimal sizes for raised beds
Distances between beds
Which type of soil to use

Here are a few important directions to follow to have a thriving Square Foot Garden:

A square foot garden bed filled with leafy green vegetables and flowering plants, surrounded by a mulch path and enclosed by a wire fence in a sunlit outdoor setting.

Use a grid in your square foot garden.

I used to have raised beds with permanent grids and some without. Here’s what I learned: the ones with grids utilize the space much more efficiently. Also, I quickly filled an empty square (see tip #5 below) with seeds or transplants in my gardens with grids. Now, all of my raised beds have grids.

Top-down view of a square foot garden bed divided into squares with black grid lines, showing young green plants sprouting in the soil; “growinginthegarden.com” is visible at the bottom.

I am not the most naturally-organized gardener, but here’s my secret — the permanent grids give me a framework and guidelines to be organized. I love them!

I use watering grids from Garden in Minutes for the permanent grids in my garden. The benefits of using the Garden Grid™ from Garden In Minutes include:

The grids are prominent and easy to see.
Assembly is simple; the garden grids come in preassembled sections that press together by hand in seconds.
At the end of each season, lifting the grid off the bed and adding compost to fill the beds is easy. With my previous grids made of wood, it was challenging to add compost because the grids were screwed into the beds.
Each square is watered evenly with 16 water streams, which helps seed germination.

Follow the plant spacing guidelines.

Planting the recommended amounts allows you to utilize all the space in the beds without overcrowding. This post shares the recommended plant spacing for square foot gardens.

Green garlic plants thrive in a square foot garden raised bed, with a drip irrigation system visible among the mulch.

Square Foot
Gardening Plans
Spring, Monsoon & Fall/Winter Plans for Small, Medium & Large Gardens

Free Square Foot Gardening Downloads

Follow the garden bed and aisle size guidelines.

Square foot gardening recommends beds no wider than four feet with at least three feet between each bed. It may seem like a lot of space between beds, but plants thrive in square-foot gardens and will quickly fill in the spaces.

A backyard raised bed garden design featuring several wooden beds filled with lush green plants, surrounded by trees and a fence, all beneath a sunny blue sky. The website growinginthegarden.com is at the bottom.

Answer to frequently asked question: The white buckets in my beds are in-bed vermicomposting bins. Learn more about in-bed vermicomposting in this blog post.

Raised Bed Garden design tips: How to design a raised bed garden #raisedbeds #gardendesign

The guidelines in square foot gardening helped me design my garden. I share more raised bed garden design tips in this blog post.

Use the best soil for raised bed gardens.

A fundamental principle behind the success of square foot gardening is the soil Mel Bartholomew developed.

“Years of experimentation led Mel Bartholomew to a simple mixture of equal parts peat moss, coarse vermiculite, and blended compost as the perfect growing medium for his revolutionary gardening method. Mel was forever experimenting and adapting his method, but although he recognized that there were circumstances under which gardeners might need to alter the ingredients in the growing medium, he never, ever found anything that could fully substitute for the original Mel’s Mix formula.”
All New Square Foot Gardening, page 125.

Use the correct blend of soil, and don’t forget to add fresh compost each time you plant.

1/3 vermiculite or perlite
1/3 coconut coir (triple washed is best) or peat moss
1/3 compost (several different types are best)

Three rows of soil amendments: dark soil, light vermiculite, and compost on a tarp.

If you live in the Phoenix valley, I worked with Arizona Worm Farm to develop a modified Mel’s Mix that is well-suited for growing in the low desert of Arizona’s harsh conditions. Read this post for more information about the best soil for raised bed gardens.

3. Use vertical space to have a successful Square Foot Garden

Growing up instead of out is one of the easiest ways to make square-foot gardening more productive, and these inexpensive vertical gardening ideas are simple options to try.

There never seems to be enough space in the garden; fortunately, there’s a simple solution – growing vertically. Vertical gardening has several benefits, including:

Saves space and adds additional growing room.
Many vining crops grow best when grown vertically.
Adds visual appeal to the garden.
Growing crops vertically provides additional sunlight and airflow for plants.
Pests and diseases are often easier to spot when growing crops vertically rather than sprawling on the ground.

Green pea pods and leaves thriving on a metal trellis, showcasing vertical gardening vegetable techniques in a lush garden. Other garden beds and plants are visible in the background. growinginthegarden.com text appears at the bottom.

Several small pumpkins grow on green vines surrounded by lush leaves in a garden.

There are several ways to grow vertically, such as ladders, ladder mesh trellises, etc., but no matter how you do it, use the vertical space in your garden!

I used square-foot gardening principles to plan and space my Three Sisters garden in raised beds—it worked surprisingly well, even for corn.

Looking for ways to add vertical space to your garden? This post shares 10 of my favorite ideas.

In this blog post, find more ways to add vertical space to your garden.

4. Follow a planting guide for your area

Each crop has a preferred growing temperature. Some prefer cooler weather and tolerate a slight frost; others need warmer weather to grow well and would die in frosty conditions. Plants are happiest and grow best when planted at the ideal soil temperature and growing conditions.

Planting crops at the right time is a crucial part of gardening. However, the best time to plant varies significantly by region. A big part of gardening success is learning the unique growing conditions of your area.

Find a reliable planting guide for your area, follow it using square foot gardening principles, and you will be successful. Read this post to help find a local planting guide for your area.

Collage of colorful garden vegetables and planting guides. Text overlay reads: How to Find a Planting Calendar for Your Area, plus expert tips on when to plant your garden. Below, April flower, herb, and vegetable planting lists are displayed on boards.

A collage of various vegetables with the text Vegetable Planting Guide for Low Desert Vegetables overlaid.

For example, where I live in Arizona, our planting dates differ significantly from other parts of the country. I use this Arizona Vegetable Planting Guide.

Planting Calendar for the Low Desert of Arizona

Perpetual Vegetable, Fruit & Herb Calendar shows you when to plant vegetables in the low desert of Arizona and whether to plant seeds or transplants. See it in my shop.

5. When a square opens up, plant something

The last of the 5 tips for a successful square foot garden seems simple, but it is essential. When you follow correct square-foot gardening principles, you will harvest plants from squares and have open space that might go unnoticed in less-organized gardens. An empty square is an invitation to plant!