4x12 Raised Bed Garden Plans
2 finished layouts for a 4 ft x 12 ft bed - copy one square for square, or open it in the planner and change whatever you like. Every plant count below is calculated from real spacing data.
Data reviewed: . Plant spacing, companion and sow-date data are checked against university-extension sources; this date changes only when we actually re-verify.
- Squares
- 48
- Plants
- 297-319
- Soil at 6 in
- 24 cu ft
- Soil at 12 in
- 48 cu ft
A serious bed - 48 squares, usually built from two 4x6 kits or a single long run of boards. Enough to preserve from, not just eat from.
Plan 1: The full-season family bed
Warm seasonThe whole summer garden in one bed, including the sprawlers that need room at the ends.
What that plants
- Carrot - 4 squares64
- Radish - 2 squares32
- Bush Bean - 3 squares27
- Pole Bean - 3 squares27
- Beet - 2 squares18
- Onion - 2 squares18
- Spinach - 2 squares18
- Chives - 1 square16
- Lettuce - 4 squares16
- Marigold - 3 squares12
- Basil - 2 squares8
- Corn - 2 squares8
- Parsley - 2 squares8
- Celery - 1 square4
- Swiss Chard - 1 square4
- Thyme - 1 square4
- Tomato - 3 squares3
- Cucumber - 2 squares2
- Okra - 2 squares2
- Pepper - 2 squares2
- Zucchini / Summer Squash - 2 squares2
- Dill - 1 square1
- Nasturtium - 1 square1
- Total plants297
Loads all 48 squares into the free planner. Change any square, then print it or copy a share link. Nothing to sign up for.
Plan 2: The preserving bed
Warm seasonBuilt for volume of one thing at a time - blocks of tomatoes, beans and alliums you can can, freeze or dry in one go.
What that plants
- Carrot - 4 squares64
- Pole Bean - 4 squares36
- Chives - 2 squares32
- Radish - 2 squares32
- Beet - 2 squares18
- Bush Bean - 2 squares18
- Garlic - 2 squares18
- Onion - 2 squares18
- Spinach - 2 squares18
- Basil - 3 squares12
- Marigold - 3 squares12
- Lettuce - 2 squares8
- Parsley - 2 squares8
- Swiss Chard - 2 squares8
- Thyme - 1 square4
- Tomato - 4 squares4
- Eggplant - 2 squares2
- Okra - 2 squares2
- Pepper - 2 squares2
- Oregano - 1 square1
- Rosemary - 1 square1
- Sage - 1 square1
- Total plants319
Loads all 48 squares into the free planner. Change any square, then print it or copy a share link. Nothing to sign up for.
Filling a 4x12 bed
Volume is length x width x depth, so a 4x12 bed needs the same soil whichever plan you pick. These figures include the 10 percent most people wish they had allowed for settling.
| Depth | Soil to buy | Cubic yards | Mel's Mix - equal thirds |
|---|---|---|---|
| 6 inches | 26.4 cu ft | 0.98 | 8.8 cu ft blended compost, 8.8 cu ft peat moss (or coco coir), 8.8 cu ft coarse vermiculite |
| 12 inches | 52.8 cu ft | 1.96 | 17.6 cu ft blended compost, 17.6 cu ft peat moss (or coco coir), 17.6 cu ft coarse vermiculite |
Six inches is the classic square foot gardening depth and is enough for almost everything on this page. Go to 12 inches if you want carrots and potatoes to size up properly, or if the bed sits on concrete rather than open ground.Work out bag counts for any depth.
How to use these plans
- Face the bed. The top row of every plan is the north edge. Tall crops go there so they shade the path, not your lettuce.
- Check your frost date before you sow anything. The cool-season plans go in weeks before your last spring frost; the warm-season plans go in after it. The planner turns your frost date into a sow-and-harvest date for every plant in the bed.
- Swap freely, but keep the spacing. Replacing lettuce with spinach is fine. Squeezing in an extra tomato is not - crowding is the single most common reason a first raised bed underperforms.
- Print it and take it outside. Open the plan in the planner and print - you get the grid with labels, no menus or ads.
At 4 ft wide you can reach the middle from either side without stepping on the soil, which is the whole point of a raised bed - compacted soil undoes the method.
Plans for other bed sizes
Questions about 4x12 beds
How many plants fit in a 4x12 raised bed?
A 4x12 bed is 48 square-foot squares. How many plants that holds depends entirely on what you grow, because square foot gardening puts 1, 4, 9 or 16 plants in a square depending on the plant's size. The 2 finished layouts on this page work out at 297 to 319 plants - every one of those counts is calculated from the spacing data, not estimated.
How much soil does a 4x12 raised bed need?
Filling a 4 ft x 12 ft bed to 6 inches deep takes 24 cubic feet; to 12 inches it takes 48 cubic feet (1.96 cubic yards once you add the usual 10 percent for settling). Mel's Mix splits that into equal thirds of compost, peat moss and coarse vermiculite. The soil calculator works out the bag counts for any depth.
Can I reach the middle of a 4x12 bed?
At 4 ft wide you can reach the middle from either side without stepping on the soil, which is the whole point of a raised bed - compacted soil undoes the method.
Do I have to follow these plans exactly?
No. They are starting points, and the planner lets you change any square. Each plan opens in the free planner with one tap, so you can swap what you do not eat for what you do. The two things worth keeping are the tall crops on the north edge, so they do not shade the rest, and the spacing - crowding is the most common reason a first bed disappoints.