Square-foot and row spacing | Little Plot Works

Choose the pattern, then the distance

A packet may give two distances: between plants in a row, and between rows. Equal-distance block growing uses a different arrangement. Copying the smaller number into both fields can produce a very dense plan that the source never intended.

Our reference table keeps block and traditional-row presets separate. Read the notes for your crop, and override the tool when your packet or local advice calls for another distance.

Equal-distance blocks

In block mode, each plant is positioned on a rectangular grid with the same interval in both directions. Access is from outside the bed; the tool does not insert paths. CSU Extension describes this pattern and cautions that crowding can affect airflow. Read the block-layout source.

At 6-inch spacing, a 24 × 24-inch block with 3-inch edge allowances contains 4 × 4 positions. That calculation describes a pattern, not a recommendation for any crop you happen to select.

Fig. 1A 24 × 24-inch block at 6-inch spacing with 3-inch edge allowances: 4 × 4 = 16 positions. Faint circles are each plant’s spacing zone.

Traditional rows

In row mode, plants run along the entered length. The separate row distance runs across the width. A 96 × 48-inch bed with 12-inch in-row and 24-inch row spacing holds 8 plants in each of 2 rows with default margins.

Check what a source includes in its row spacing. If it incorporates access space, do not add that space a second time unless you want it. Conversely, do not assume a tight row interval gives you room to walk.

Fig. 2A 96 × 48-inch bed with 12-inch in-row and 24-inch row spacing: 8 plants in each of 2 rows.

Where square-foot gardening fits

A one-foot grid divides a bed into manageable sections. It does not create a universal crop-density rule. For example, 6-inch spacing can give four centres in a 12-inch square with half-spacing margins, while 3-inch spacing can give sixteen. Large crops can need several squares and support.

Little Plot Works uses a continuous measured block layout, not a fixed square-foot-cell system or a prescribed soil recipe. Enter appropriate spacing and let the tool count positions rather than forcing every crop into one square.

Fig. 3One 12-inch square with half-spacing margins: 6-inch spacing gives four centres, 3-inch spacing gives sixteen.

Edges and partial spaces

A 50-inch length at 12-inch spacing does not fit an extra plant with default margins. Four positions use 36 inches between the first and last centre. The remaining 14 inches become 7 inches at each edge. The spacing calculator exposes that remainder.

In a mixed plan, a partly filled crop strip is still reserved for that crop. Vacant positions within the strip and the fully unallocated part of the bed are reported separately.

Fig. 4A 50-inch length at 12-inch spacing: 4 positions span 36 inches between the first and last centre; the remaining 14 inches become 7 inches at each edge.

Put it into a plan

Compare your spacing

Then use the bed planner for several crops. If a request does not fit, reduce the quantity or provide more space rather than assuming tighter spacing is safe.