Reading spacing advice
Read plant spacing and row spacing
Two numbers on a growing guide often describe two different directions. One separates neighboring plants along a row; the other separates the rows themselves. Keeping those values distinct makes a layout easier to understand and avoids a count that looks precise but uses the wrong arrangement.
Reviewed Oct 27, 2026
Read the two directions separately
Plant spacing is the distance between centers along the row in the layout you are making. Row spacing is the distance between adjacent row centers. They can be equal, but equality is a choice, not a rule. A guide that gives both values should not be reduced to a single square-grid number.
Spacing advice also needs its growing context. The reviewed Minnesota lettuce guide, for instance, distinguishes plant spacing from a wider row separation. The crop name alone is not enough to turn every value in that guide into one universal preset.
Identify the growing method
Look for distinctions such as harvest stage, growth habit, support, or whether a value describes seed placement or final thinned plants. Retain those details with the selected spacing. If two sources use different methods, choose one clearly instead of averaging their numbers.
When a source gives a range, select a value within the applicable range and label it as your choice. Do not present the lower endpoint as an automatically optimal density. The calculator counts the arrangement you ask for; it does not assess plant health or maximize yield.
Count positions rather than dividing areas
The rectangular layout starts plant centers at the selected edge allowance and adds positions at fixed intervals. It counts only positions that remain within the opposite boundary. Both directions are counted separately, then multiplied.
Using a 300 × 120 cm bed with a 15 cm allowance, 30 cm plant spacing yields ten positions along the length. A 45 cm row spacing yields three rows across the width: at 15, 60, and 105 cm. The resulting layout has 30 positions. Changing only the row spacing therefore changes the count without changing the bed area.
Keep a preset honest
A crop preset should show its source, units, and growing-method conditions next to the values. If you change a value, retain the source as background information but identify the new value as your own. A source link does not make an edited value source-endorsed.
Before saving, inspect the row and column counts or the coordinate table. For a round container, the circular boundary removes points from the centered grid, so a simple rectangle count will not apply. Use the shape that matches the space, then carry the resulting target count into the seed-quantity tool.