Square Foot Gardening Plans; The Complete Beginners Guide

Square Foot Gardening: The Complete Beginner's Guide

Square foot gardening is the most space-efficient way to grow vegetables.

Once you try it, you may never go back to planting in rows.

You divide a raised bed into a grid of one-foot squares, then plant each square with one crop.

The result is two to three times more food from the same space as a row garden.

You will also spend far less time weeding and watering.

Examples of square foot gardening beds.

Mel Bartholomew introduced square foot gardening in 1981. His book has sold millions of copies and is one of the best-selling vegetable gardening books ever written. Today gardeners use his method everywhere, from city rooftops to small backyards.

This guide covers everything you need to start your own square foot garden, including a spacing chart for all the common vegetables.

What you will find in this guide

How it works: and why it beats rows
Squares vs. rows: a side-by-side chart
Setting up: size, materials, and sun
Mel's Mix: the soil recipe
The grid: four easy ways to make one
Spacing chart: how many plants per square
Planting day: step by step
Succession planting: three harvests per square
Care: watering, feeding, and weeding
Mistakes to avoid: and how to fix them

See also our hub page Planning a Vegetable Garden for more information.

What Square Foot Gardening Is and Why It Works

Mel Bartholomew was a retired civil engineer. In the early 1980s he noticed how wasteful row gardening was.

Row gardens give up a lot of space to paths. Seeds are sown too thickly and then thinned, and wide gaps between plants fill up with weeds.

His answer was simple: a 4 x 4 foot raised bed filled with rich soil and divided into 16 one-foot squares. Each square gets the right number of plants for that crop.

No paths through the bed. No thinning. Just planting from edge to edge.

These are the main ideas behind square foot gardening:

Plant densely: every square is planted, so weeds have no bare soil to grow in.
Never walk in the bed: at 4 feet wide, you reach every square from the outside, so the soil stays loose.
Start with good soil: Mel's Mix gives every square a perfect start.
One crop per square: each square grows one kind of vegetable at close spacing.
Replant right away: when one square is harvested, plant something new in it.

The payoff: a square foot garden uses a fraction of the space and water of a row garden, has far fewer weeds, and can grow two to five times more food per square foot.

Square Foot Gardening vs Traditional Row Gardening

Traditional Row Gardening	Square Foot Gardening
Wide paths between every row waste 80% of space	Every square foot is planted - no wasted space
Seeds sown thickly, then thinned - wasteful	Exact number of seeds or transplants per square - no waste
Weeds thrive in bare soil between plants	Dense planting shades out weeds - virtually no weeding
Soil compacts from walking between rows	Never walk in the bed - soil stays loose permanently
Hard to rotate crops systematically	Each square rotates independently - easy crop rotation
Requires large space to be productive	A 4x4 ft square foot garden can feed one to two people
High water use - watering large bare soil areas	Water only where plants grow - 80% less water

Setting Up Your Square Foot Garden

Choosing the Right Size for Square Foot Gardening

The standard square foot garden is a 4 x 4 foot raised bed, divided into 16 one-foot squares.

The 4-foot width is the key. You can reach the center of the bed from either side without stepping in, so the soil stays loose.

Need more room? Make the bed longer, not wider. 4 x 8, 4 x 12, and 4 x 16 foot beds are all common.

If you can only reach the bed from one side, such as against a wall or fence, keep it 2 feet wide.

Square Foot Garden Size	Number of Squares	Best For
4 x 4 ft	16 squares	First-time square foot gardeners; very small spaces
4 x 8 ft	32 squares	The most popular size - feeds one to two people well
4 x 12 ft	48 squares	Families; serious food growers
4 x 16 ft	64 squares	Large households; selling surplus produce

Colorful square foot gardening example.

Location for Your Square Foot Garden

Sun comes first. Choose the sunniest spot you have: at least 6 hours of direct sun a day, and 8 hours for tomatoes and peppers.

Put tall crops at the north end of the bed, so they don't shade the shorter ones.

Pick a spot close to a water source. Square foot beds need regular watering.

Building the Square Foot Garden Box

Cedar or redwood boards are the most popular choice. Use untreated wood. Galvanized steel panels, composite lumber, and concrete blocks also work.

Make the bed 4 feet wide and any length you like.

It should be at least 6 inches deep, but 12 inches is best for most crops. A bed 18 to 24 inches deep is great for deep roots, and for gardeners who would rather not bend.

Use our free planner: Our interactive vegetable garden planner uses the square foot gardening spacing system to show exactly how many plants fit in each square of your bed - before you buy a single seed or plant.

Mel's Mix - The Perfect Square Foot Gardening Soil

Mel Bartholomew's best idea wasn't the grid. It was the soil he put in it.

Mel's Mix is three ingredients in equal parts. It stays light and loose, it is rich enough that you seldom need fertilizer, and it holds moisture, so you water less.

Don't fill the bed with garden soil or topsoil. In a raised bed it packs down hard and drains poorly.

Mel's Mix Recipe for Square Foot Gardening

Ingredient	Proportion	Purpose in Square Foot Gardening
Blended compost	One third	Nutrition and moisture retention. Use a blend of several compost types for the best results - mushroom compost, garden compost, worm castings, and aged manure all contribute different nutrients.
Coarse vermiculite	One third	Aeration and moisture retention. Vermiculite holds water and nutrients in tiny pockets and releases them slowly to roots. Bartholomew specified coarse vermiculite specifically - the fine grade does not work as well in square foot gardening beds.
Peat moss or coir	One third	Structure and additional moisture retention. Coir (coconut fiber) is the more sustainable modern alternative to peat moss and works equally well in square foot gardening.

A 4 x 4 foot bed, 12 inches deep, needs about 16 cubic feet of Mel's Mix.

Mix it on a tarp before you fill the bed. Dampen the peat or coir as you go, because dry peat sheds water at first.

Can't find coarse vermiculite? It has become expensive and hard to find in some areas. Perlite works too. It drains well and keeps the mix airy, though it holds a little less water.

Building the Grid for Square Foot Gardening

The grid is not optional. It divides the bed into one-foot squares, so you always know where to plant and what is growing where.

Without a grid, a square foot garden soon turns into a jumble.

Materials for a Square Foot Garden Grid

Wooden lath or thin wood strips: the most common choice. They last and look nice.
Heavy twine: cheap and simple. Stretch it between small nails or hooks on the frame.
Old vinyl mini-blinds: cut to length. They hold up to weather and are easy to cut.
PVC pipe: light and long-lasting. Cut it to length and lay it across the frame.

Whatever you use, leave the grid in place all season. You need it every time you plant, not just the first time.

A 4 x 4 foot bed has 16 squares, a 4 x 8 foot bed has 32, and so on.

The Square Foot Gardening Spacing Chart

Spacing is the heart of square foot gardening.

Seed packets give wide spacing meant for row gardens with paths. In a square foot garden, you space plants by how big they get when grown.

That means anywhere from one big plant to sixteen small ones in each square.

Use this chart as your planting guide:

Plants per Square Foot	Vegetables	Spacing Within Square
1	Tomatoes, peppers, eggplant, broccoli, cabbage, cauliflower, kale, zucchini, cucumbers (with trellis), corn, sunflowers	One plant centered in the square
2	Not commonly used - most plants fit into 1 or 4 per square	Two plants spaced 6 inches apart
4	Lettuce (large), Swiss chard, basil, parsley, strawberries, marigolds, dwarf kale	Four plants in a 2x2 grid, 6 inches apart
8	Peas, pole beans	Eight plants in two rows of four, 4 inches apart
9	Spinach, beets, bush beans, turnips	Nine plants in a 3x3 grid, 4 inches apart
16	Carrots, radishes, onions, garlic	Sixteen plants in a 4x4 grid, 3 inches apart

An easy way to remember it: if the seed packet says 3 inches apart, plant 16 per square. Six inches apart, plant 4. Twelve inches apart, plant 1.

Sample Square Foot Garden Layout - 4x4 ft Bed

Here is one way to fill a 4 x 4 foot bed in spring, using all 16 squares:

Square	Crop	Plants per Square
1	Cherry tomato (with trellis at north edge)	1
2	Pepper	1
3	Basil	4
4	Marigolds (pest control)	4
5	Lettuce mix	4
6	Spinach	9
7	Carrots	16
8	Radishes	16
9	Green onions	16
10	Peas (with small trellis)	8
11	Bush beans	9
12	Beets	9
13	Kale	1
14	Broccoli	1
15	Cucumber (with trellis)	1
16	Parsley	4

That is 16 different crops in 16 square feet. A row garden would need many times the space to grow the same mix.

Use our free interactive garden planner to design your own layout and check companion planting before you plant.

Prefer paper? Print our free garden worksheets, including a square foot garden planner.

Small square foot gardening example.

Planting Your Square Foot Garden

Planting day is easy. Mel's Mix is loose and weed-free, so just smooth the top of each square with your hand. Then:

Check your grid: make sure it is in place before you start.
Make planting holes: use a finger or a pencil, spaced by the chart above.
Plant: sow 2 or 3 seeds per hole and thin to 1 when they come up, or set in transplants.
Water gently: soak the whole square, and keep the mix from drying out for the first few days.
Label each square: a plant label or small stake saves guessing later.

Tall plants go at the north end. Put tomatoes, trellised cucumbers, corn, and sunflowers along the north edge, so they don't shade the shorter crops.

Raised bed square foot gardening example.

Succession Planting in Square Foot Gardening

Replant each square as soon as you harvest it. That is what makes a square foot garden so productive.

Each square stands on its own, so one can finish while the others keep growing.

A well-tended bed can give three or four harvests from each square in one season. For example:

Radishes in early spring (25 days), then beans for summer, then spinach for fall
Lettuce in spring, then a tomato for summer, then garlic to overwinter
Peas in cool spring, then cucumbers when it warms up, then kale for fall

The grid shows you at a glance which squares are free, and you can replant one without disturbing the rest.

Watering, Feeding, and Maintaining a Square Foot Garden

Watering Your Square Foot Garden

Raised beds dry out faster than in-ground gardens. In hot weather, you may need to water every day.

Use the finger test: push a finger an inch into the soil. If it feels dry, water well.

Water slowly at the base of the plants, not from overhead. A soaker hose or drip line on a timer keeps watering even, which helps prevent blossom end rot in tomatoes.

Feeding Your Square Foot Garden

Mel said his mix never needs fertilizer. For light crops in a new bed, that's mostly true.

Heavy feeders like tomatoes, peppers, corn, and cucumbers do better with a liquid vegetable fertilizer every two weeks once they start to bloom.

Each spring after the first year, add 1 to 2 inches of compost to the top of the bed.

Weeding

This is where square foot gardening shines. Close planting leaves almost no bare soil for weeds.

Most gardeners spend less than five minutes a week weeding a square foot bed.

Rotating Your Crops

Growing the same plant family in the same square year after year lets diseases build up in the soil.

After a crop finishes, plant something from a different family in that square. The three big families to watch:

Cabbage family: broccoli, cabbage, Brussels sprouts, cauliflower, kale, kohlrabi, turnips, and rutabagas
Squash family: cucumbers, summer and winter squash, pumpkins, melons, and gourds
Tomato family: tomatoes, peppers, eggplant, and potatoes

Square foot gardening example.

Common Square Foot Gardening Mistakes and How to Fix Them

Using the wrong soil. Topsoil or garden soil packs down and drains poorly in a raised bed. Use Mel's Mix or a loose, rich potting mix.
Making the bed too wide. If you have to step in to reach the middle, you pack down the soil. Keep beds 4 feet wide or less.
Skipping the grid. Without it, spacing turns into guesswork. Make a grid and leave it in place all season.
Too many big plants. One tomato in a 4 x 4 bed is fine. Six tomatoes take over a third of the bed. Mix big and small crops.
Leaving squares empty. When a crop finishes, plant the next one right away. Two weeks of bare soil is two weeks of lost harvest.
Forgetting the compost. Each spring after the first year, add 1 to 2 inches of compost to keep the mix rich and loose.
Starting too big. Begin with one 4 x 4 bed and learn it well. One bed done well beats three beds done poorly.

Frequently Asked Questions About Square Foot Gardening

How many people can a square foot garden feed?

One 4 x 8 foot bed (32 squares), kept replanted all season, can give one or two people a good share of their salads, herbs, and vegetables.

For a family of four, plan on two or three 4 x 8 foot beds with a mix of cool and warm season crops.

Does square foot gardening work in containers?

Yes. Any container big enough for a grid will work.

A 2 x 2 foot planter makes four squares, just right for salad greens, herbs, and radishes on a patio or balcony.

Can I use square foot gardening without building a raised bed?

Yes, you can mark a grid right on prepared garden soil.

But it works best in a raised bed filled with Mel's Mix, because in-ground soil slowly packs down as you water it.

How deep should a square foot garden bed be?

6 inches is the minimum, fine for lettuce and herbs. 12 inches suits most vegetables.

For carrots, parsnips, and tomatoes, or if you'd rather not bend, go with 18 to 24 inches.

Is the spacing really different from seed packet spacing?

Yes, very different. Seed packet spacing includes room for paths between rows.

Square foot spacing only counts the room each grown plant needs. That's why you can fit so many more plants in the same space.

Does square foot gardening work for tomatoes?

Yes. Plant one tomato per square, at the north end of the bed.

Cherry tomatoes do especially well when trained up a trellis. Big slicing tomatoes do better with two squares each.

Start Your Square Foot Garden Today

Square foot garden planting example.

Square foot gardening is one of the easiest ways for a beginner to grow a lot of vegetables.

You don't need experience, a big yard, or costly tools. You need a 4 x 4 foot box, the three parts of Mel's Mix, a simple grid, and a handful of seeds.

Build one bed this weekend. Plant it well, and replant each square as it finishes. By fall you'll see why millions of gardeners grow this way.

Free tools to plan your square foot garden: