Read the spacing range correctly
The linked guide gives two levels of spacing. The detailed section says turnips should be thinned to 3 to 4 inches within rows that are 12 to 18 inches apart. The broader summary mentions 3 to 6 inches. These are not interchangeable instructions for one plan; the detailed section is the reference used here.
Within-row spacing describes the distance between retained plants in the same row. Row spacing describes the distance between one row and the next. Neither number by itself defines a whole bed layout, and a single row is not an entire garden plan.
- Write down which source range you are following before marking plants.
- Treat the within-row figure as a thinning target for retained plants, not a sowing depth or seed spacing.
- Record row spacing separately from within-row spacing so the two numbers are not confused.
Source context: Utah State University Extension
Choose one labeled scenario
For a worked example, this guide selects 4-inch centers within the row, the upper end of the detailed 3 to 4 inch range. That choice is a labeled scenario, not a claim that 4 inches suits every garden. A gardener may prefer a different point in the range based on their own access needs and observations.
The 12 to 18 inch row spacing must also be chosen separately. It is not derived from the within-row interval. Access paths, tools, adjacent rows and the mature habit of the plants all affect how a bed is arranged, but this guide does not invent distances for those features.
- State the chosen within-row interval and the chosen row interval as two separate decisions.
- Label the scenario clearly, for example: 4-inch retained-plant centers within rows.
- Decide access and adjacent-row arrangements separately rather than assuming one row spacing fits every bed.
Source context: Utah State University Extension
Count retained plants along one row
The verified example uses one measured 96-inch row, 4-inch centers and 2-inch margins at both ends. The first center falls at 2 inches and the last at 94 inches, giving 24 calculated positions. The counted item is retained plants, meaning the plants intended to remain after thinning, not seeds sown and not seedlings that will later be removed.
This is a geometrical count for one row. It does not predict germination, survival or final harvest, and it does not describe a full garden layout. The linked row calculator can count this exact length, center interval and both end margins in inches or centimeters.
- Measure the row length before counting.
- Enter the chosen center interval and both end margins into the row calculator.
- Confirm that the result is labeled as retained plants for that one row.
- Repeat the measurement and count for each additional row rather than multiplying a single row into a whole-bed claim.
Source context: Utah State University Extension
Mark the plan before thinning
Sowing, thinning and the established planting are different stages. The spacing range applies to the thinned, retained plants. Marking intended positions before thinning helps you see whether the row matches your chosen interval and margins.
Keep the source range visible while marking. If your chosen interval sits at 3 inches, 4 inches or another point within the detailed range, note it on the plan so the count and the spacing decision agree.
- Mark the first and last intended plant centers using your chosen end margins.
- Mark intermediate centers at your chosen within-row interval.
- Check the marked count against the calculator result for the same row length, interval and margins.
- Keep a note of the chosen interval and row spacing with the plan.
Source context: Utah State University Extension
Check your measured example
One measured 96-inch row, with selected 4-inch centers and 2-inch margins at both ends. Count 24 retained plants.
Reference and growing system: USU’s detailed Planting and Spacing section gives turnips thinned to 3–4 inches within rows 12–18 inches apart. The broader summary also mentions 3–6 inches; this case follows the detailed section.
| Quantity | Calculated result |
|---|---|
| Usable row length (in) | 96 |
| Selected center spacing (in) | 4 |
| Margin at each row end (in) | 2 |
| Positions in this row | 24 |
| First center from row start (in) | 2 |
| Last center from row start (in) | 94 |
| What is being counted | retained plants |
The worked example uses a 96-inch row, 4-inch centers and 2-inch margins at both ends. The first center is at 2 inches and the last at 94 inches, producing 24 calculated positions. The counted item is retained plants, not seeds or seedlings to be removed. This is a geometrical example for one row, not crop advice or a complete garden layout.
Count this row in the spacing calculator ↗Example inputs explain the method. Review the source context, chosen cultivar and actual site before planting or ordering.
Your before-you-plant checklist
- The chosen within-row interval is written down and labeled.
- Row spacing is recorded separately from within-row spacing.
- The row length, center interval and both end margins are measured or entered consistently.
- The count is described as retained plants for one row, not as a whole-garden total.
- The plan notes that sowing and thinning happen before the retained spacing is reached.
Questions that come up while planning
What spacing does USU give for turnips?
USU's detailed Planting and Spacing section gives turnips thinned to 3 to 4 inches within rows 12 to 18 inches apart. A broader summary also mentions 3 to 6 inches; this guide follows the detailed section.
Does the 96-inch example describe a whole garden?
No. It is a geometrical count for one measured row with 4-inch centers and 2-inch margins at both ends, giving 24 retained-plant positions. Other rows and bed arrangements must be planned separately.
Does the count include seeds or seedlings that will be removed?
No. The counted item is retained plants, meaning the plants intended to remain after thinning. It is not a seed count and does not predict germination or survival.
Sources & method
Horticultural guidance is linked to its original source and regional context. Geometry and unit conversions are calculated separately. Read how we prepare and check a page.
- How to Grow Rutabagas and Turnips in Your GardenUtah State University Extension