3x6 Raised Bed Garden Plans
2 finished layouts for a 3 ft x 6 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
- 18
- Plants
- 110-120
- Soil at 6 in
- 9 cu ft
- Soil at 12 in
- 18 cu ft
A good compromise when a 4 ft bed is too wide to reach across - most adults can comfortably reach 18 inches, so a 3 ft bed is fully reachable from both sides.
Plan 1: The summer mixed bed
Warm seasonA little of everything, with climbers on the north edge and roots along the sunny front.
What that plants
- Carrot - 2 squares32
- Pole Bean - 2 squares18
- Radish - 1 square16
- Beet - 1 square9
- Bush Bean - 1 square9
- Basil - 1 square4
- Lettuce - 1 square4
- Marigold - 1 square4
- Parsley - 1 square4
- Swiss Chard - 1 square4
- Tomato - 2 squares2
- Cucumber - 1 square1
- Nasturtium - 1 square1
- Okra - 1 square1
- Pepper - 1 square1
- Total plants110
Loads all 18 squares into the free planner. Change any square, then print it or copy a share link. Nothing to sign up for.
Plan 2: The cool-season brassica bed
Cool seasonBroccoli, cabbage and kale with the herbs that traditionally sit beside them.
What that plants
- Radish - 2 squares32
- Cilantro - 2 squares18
- Onion - 2 squares18
- Chives - 1 square16
- Beet - 1 square9
- Spinach - 1 square9
- Celery - 2 squares8
- Lettuce - 1 square4
- Broccoli - 2 squares2
- Cabbage - 2 squares2
- Kale - 2 squares2
- Total plants120
Loads all 18 squares into the free planner. Change any square, then print it or copy a share link. Nothing to sign up for.
Filling a 3x6 bed
Volume is length x width x depth, so a 3x6 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 | 9.9 cu ft | 0.37 | 3.3 cu ft blended compost, 3.3 cu ft peat moss (or coco coir), 3.3 cu ft coarse vermiculite |
| 12 inches | 19.8 cu ft | 0.73 | 6.6 cu ft blended compost, 6.6 cu ft peat moss (or coco coir), 6.6 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 3 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 3x6 beds
How many plants fit in a 3x6 raised bed?
A 3x6 bed is 18 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 110 to 120 plants - every one of those counts is calculated from the spacing data, not estimated.
How much soil does a 3x6 raised bed need?
Filling a 3 ft x 6 ft bed to 6 inches deep takes 9 cubic feet; to 12 inches it takes 18 cubic feet (0.73 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 3x6 bed?
At 3 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.