You can fit one compact, early cabbage plant in each 1-foot square, and that’s the setup I recommend for most beds.
To grow cabbage in square foot gardening, plant one small-headed early variety per square, and give big storage cabbages a 2 x 2 block of four squares so their heads can fill out.
Cabbage is a cool-season crop that rewards good timing, steady water and rich soil.
Get those three things right in a loose, compost-rich grid, and you’ll cut firm heads in about 60 to 70 days from transplant for early types, with room left over for lettuce, onions and herbs.
How Many Cabbage Plants Fit in One Square?
One cabbage per square is the standard count, but only for compact varieties. Large late cabbages spread their outer leaves 2 to 3 feet wide, so they need four squares to form a solid head without shading their neighbors.
Use One Square for Compact Early Cabbage
In square foot gardening, cabbage sits in the “1 per square” group with broccoli, cauliflower and peppers. You set the plant in the center of the square, which leaves about 6 inches of soil on every side.
That spacing works well for early green cabbages that make 2- to 4-pound heads. When you shop for cabbage seeds or transplants, look for labels that say “early,” “compact,” or “mini,” and days to maturity in the 60- to 75-day range.
- Spacing: 12 inches center to center
- Head size: About 4 to 6 inches across
- Best season: Spring, or fall in mild areas
- Days to harvest: About 60 to 70 from transplant
I also suggest buying a roll of insect netting at the same time as your seeds. Cabbage caterpillars find young plants within days, and it’s far easier to cover a square on planting day than to fix chewed leaves later.
Reserve a 2 x 2 Block for Large Storage Cabbage
Late storage cabbages take 90 to 110 days and can make heads of 4 to 8 pounds or more. Crowd one into a single square and you’ll get a small, loose head and shaded neighbors.
Give each of these plants a 2 x 2 block, which is 4 squares, and set the plant where the four squares meet.
In a standard 4 x 4 bed, that means four storage cabbages would use the whole bed, so I’d plant one or two and keep the rest of the grid for faster crops.
| Cabbage type | Squares per plant | Plants in a 4 x 4 bed (max) | Days to harvest |
|---|---|---|---|
| Early compact green | 1 | 16 | 60 to 75 |
| Mid-season red or savoy | 1 to 2 | 8 to 16 | 75 to 90 |
| Late storage | 4 (2 x 2) | 4 | 90 to 110 |
Which Cabbage Varieties Work Best in a Small Bed?
Early green cabbage is the easiest fit for a one-square spot. Red and savoy types grow more slowly and spread a bit wider, so I’d plan a little extra room for them.
Choose Compact Green Cabbage for One-Square Planting
Small green ball cabbages are the workhorses of a square foot bed. Golden Acre makes 5- to 7-inch heads on compact plants and is ready in about 65 days, while Earliana makes 2-pound heads in about 60 days.
Pointed or “conical” green types, such as Charleston Wakefield, also stay narrow for their size. Here’s what I look for on the seed packet:
- Days to maturity under 75
- Head weight of 2 to 4 pounds
- “Split resistant” or “holds well,” since early cabbage splits faster than late types
- Some heat tolerance if you garden in the South or Southwest
One trade-off to know about: early cabbages don’t store long. Plan to eat them within a few weeks, as slaw, stir-fry or a quick batch of sauerkraut.
Allow More Room for Red and Savoy Cabbage
Red cabbage, like Red Acre or Ruby Ball, adds great color and stores better than early green types.
Red Acre takes 75 to 100 days and makes heads up to 4 pounds, so I’d give it one square in a bed edge or a 1 x 2 space if your soil is very rich.
Savoy cabbage has crinkled, tender leaves and a mild flavor. Its looser leaves spread wider, and most savoys take 80 to 90 days, so they do best at the edge of the bed where their outer leaves can hang over the frame.
If you want cabbage that holds into winter, pick a late storage variety and accept that it will tie up four squares for over three months.
When Should You Plant Cabbage?
Plant cabbage so it matures in cool weather, ideally when days run 60 to 70°F. That means early spring transplants in most of the US and late-summer plantings for fall, with zones 8 to 10 growing it right through fall and winter.
Time Spring Transplants Around the Last Frost
Set spring transplants out 2 to 4 weeks before your last spring frost date. Hardened-off cabbage handles light frost, and getting it in early lets heads form before summer heat turns them bitter or makes them bolt.
Work backward from your planting date:
- Start seeds indoors: 6 to 8 weeks before your transplant date
- Harden off: Over 7 to 10 days, bringing plants in if nights drop below 40°F
- Transplant: 2 to 4 weeks before last frost, when seedlings have 4 to 5 true leaves
Raised beds warm faster in spring, which helps. One caution: if young plants sit for 10 days or more at 35 to 50°F, they can bolt early, so don’t rush tiny seedlings out in a long cold snap.
Plan Fall and Winter Crops by Region
For fall, start seeds 10 to 12 weeks before your first fall frost and transplant in mid to late summer. Fall cabbage often tastes sweeter because cool nights slow growth and raise sugar levels.
- Northeast and Midwest: Start seeds in late May or June, transplant in July
- Pacific Northwest: Start in June, transplant in July or early August
- Southeast and Southwest (zones 8 to 10): Transplant from September through November for winter harvest, and skip summer plantings
- Mountain West and short seasons: Use early varieties for fall so heads finish before a hard freeze
Late-season cabbage tolerates temperatures in the low 20s °F. Toss row cover over the square if forecasts drop below about 25°F.
Prepare the Bed and Soil Before Planting
A square-foot garden bed needs at least 6 inches of loose, fertile mix, full sun and fast drainage before cabbage goes in. Since cabbage is a heavy feeder, fresh compost in each square makes a big difference in head size.
Check Bed Depth, Sunlight, and Drainage
Most cabbages root well in 6 inches of mix, though I prefer 8 to 12 inches for large storage types because extra depth holds more water.
Pick a spot with 6 to 8 hours of direct sun, and in hot regions, a little afternoon shade helps.
Your soil should drain fast but stay evenly moist. The classic square foot gardening soil mix is equal thirds by volume of blended compost, peat moss or coco coir, and coarse vermiculite. It stays loose, never needs tilling, and keeps roots from sitting in water.
Aim for a pH of 6.0 to 7.0. Clubroot, a root disease of cabbage family crops, shows up more in acidic soil below 6.0, so a simple soil test kit is worth using before your first cabbage crop.
Refresh Each Square with Compost
Before planting, add a trowel of finished compost to each cabbage square and mix it into the top few inches. For a 2 x 2 storage cabbage block, add a trowel to each of the four squares.
If your mix is a few seasons old and has settled, top up the bed to its original height. Avoid fresh manure, which can carry harmful bacteria and burn young roots.
Plant Cabbage in the Grid Step by Step
Transplants are the easiest way to start cabbage in a grid, since direct-seeded plants take up to three weeks longer to mature. Strong seedlings, careful setting and same-day pest protection give you the best start.
Start Seeds or Choose Healthy Transplants
If you start your own, sow seeds ¼ inch deep in cell trays at normal room temperature, about 60 to 70°F, under bright light. Warmer rooms make tall, weak seedlings.
When buying transplants, choose stocky plants with 4 to 6 dark green leaves and a white, healthy root ball. Skip any with yellow leaves, holes, or a tiny flower bud in the center, since stressed plants bolt.
For fall crops in hot weather, you can also direct seed: drop 3 seeds in the center of the square and snip all but the strongest with scissors once true leaves appear.
Set, Water, and Protect Each Plant
Here’s how I’d plant one square:
- Water the transplant an hour before planting.
- Dig a hole in the center of the square, just deep enough for the root ball.
- Set the plant at the same depth it grew in its pot, or slightly deeper if the stem is leggy.
- Firm the mix gently around the stem.
- Water slowly until the soil is soaked several inches down.
- Slip a cardboard collar around the stem if cutworms are common in your area.
- Cover the square with insect netting on hoops the same day, tucking the edges down tight.
Handle young plants gently. Damage to the central growing tip can stop a cabbage from ever forming a head.
Arrange the Grid Without Crowding Nearby Crops
Place cabbage along the bed edges and on the sunny south side whenever you can. Its wide outer leaves need room to spread, and taller crops shouldn’t block its light.
Use Bed Edges for Spreading Outer Leaves
Even a compact cabbage spreads 18 inches or more across by harvest. In an edge square, the outer leaves hang over the frame and the path, so the plant gets more space without stealing from the next square.
In a 4 x 4 bed, the 12 outer squares are your best cabbage spots. I’d put storage cabbages in a corner 2 x 2 block, where two sides open onto the path.
Next to cabbage, plant short or quick crops you can harvest before the cabbage fills in, such as leaf lettuce or radishes. Then the cabbage takes over that airspace as those crops come out.
Keep Tall Crops from Shading Cabbage
Put trellises and tall plants on the north side of the bed so their shade falls outside the grid. Pole beans, peas on a