Beet, carrot, parsnip, potato, radish, sweet potato and turnip: crop profiles.
Compare the botanical identities, source-listed light and soil conditions, container evidence and local-calendar inputs for beet, carrot, parsnip, potato, radish, sweet potato, turnip.
Choose the plant before choosing the quantity
Root crops differ in botanical identity, propagation material and season. A packet of small radish seed and a sweet-potato slip order cannot share a generic plant-count rule. Use labelled crop material and the chosen local growing method; this guide contains no wild-food identification.
The entries report the cited taxon’s growing conditions and descriptive dimensions. A mature width is separate from planting spacing; multiple light, moisture or life-cycle categories can reflect a genus, cultivar range or climate differences. Use the exact nursery label and local guidance to choose inputs. Soil categories describe the source record and supply no amendment recipe.
Beet
Beet: the cited botanical record is Beta vulgaris Garden Beet Group. Root beet and leaf chard are different crop selections of this species; do not pool their spacing assumptions.
Source-listed light conditions: full sun, partial shade. Drainage and moisture descriptions: good drainage, moist. Soil categories: high organic matter. Listed soil pH categories: Neutral (6.0-8.0).
Reference dimensions: height: 1 ft 0 in to 1 ft 6 in; width: 0 ft 8 in to 1 ft 0 in. Life cycle listed: annual, biennial. Container use is explicitly listed in the source.
Source: NC State Extension Plant Toolbox: Beta vulgaris Garden Beet Group
Carrot
Carrot: the cited botanical record is Daucus carota subsp. sativus. This is the cultivated carrot record, not identification of wild carrot or lookalikes.
Source-listed light conditions: full sun, partial shade. Drainage and moisture descriptions: good drainage, moist. Soil categories: loam (silt), sand. Listed soil pH categories: Neutral (6.0-8.0).
Reference dimensions: height: 0 ft 3 in to 3 ft 0 in; width: 0 ft 2 in to 0 ft 3 in. Life cycle listed: annual, biennial. Flowering season in the reference region: fall, summer. Container use is explicitly listed in the source.
Source: NC State Extension Plant Toolbox: Daucus carota subsp. sativus
Parsnip
Parsnip: the cited botanical record is Pastinaca sativa. Use commercially labelled crop seed; this guide provides no wild-plant identification or plant-handling procedure.
Source-listed light conditions: full sun. Drainage and moisture descriptions: good drainage, moist, occasionally dry, occasionally wet. Soil categories: clay, loam (silt), sand.
Obtain mature dimensions for the selected nursery plant; the reference supplies no single size range. Life cycle listed: biennial. Flowering season in the reference region: spring, summer. The source’s location field does not establish container use; request a cultivar-specific container record.
Potato
Potato: the cited botanical record is Solanum tuberosum. The crop record is separate from sweet potato; no culinary or plant-toxicity advice is supplied.
Source-listed light conditions: full sun. Drainage and moisture descriptions: good drainage, moist. Soil categories: high organic matter, sand. Listed soil pH categories: Acid (<6.0).
Reference dimensions: height: 1 ft 0 in to 2 ft 0 in; width: 1 ft 0 in to 1 ft 6 in. Life cycle listed: annual, perennial. Flowering season in the reference region: fall, summer. Container use is explicitly listed in the source.
Radish
Radish: the cited botanical record is Raphanus raphanistrum subsp. sativus. Small spring radishes and larger storage selections need distinct spacing and calendar inputs.
Source-listed light conditions: full sun, partial shade. Drainage and moisture descriptions: good drainage. Soil categories: loam (silt), sand. Listed soil pH categories: Neutral (6.0-8.0).
Reference dimensions: height: 0 ft 6 in to 3 ft 0 in; width: 1 ft 0 in to 2 ft 0 in. Life cycle listed: annual, biennial. Flowering season in the reference region: spring. Container use is explicitly listed in the source.
Source: NC State Extension Plant Toolbox: Raphanus raphanistrum subsp. sativus
Sweet potato
Sweet potato: the cited botanical record is Ipomoea batatas. This crop species is separate from potato and ornamental morning glory; keep the selected crop material identified.
Source-listed light conditions: full sun, partial shade. Drainage and moisture descriptions: good drainage, moist, occasionally dry, occasionally wet. Soil categories: high organic matter, loam (silt).
Reference dimensions: height: 6 ft 0 in to 10 ft 0 in; width: 8 ft 0 in to 10 ft 0 in. Life cycle listed: annual. Flowering season in the reference region: spring, summer. Container use is explicitly listed in the source.
Turnip
Turnip: the cited botanical record is Brassica rapa Rapifera Group. Turnip is a root crop selection; leaf crops of the same species do not share all spacing inputs.
Source-listed light conditions: full sun. Drainage and moisture descriptions: good drainage, moist. Soil categories: high organic matter, loam (silt). Listed soil pH categories: Acid (<6.0); Neutral (6.0-8.0).
Reference dimensions: height: 1 ft 0 in to 1 ft 6 in; width: 0 ft 6 in to 1 ft 0 in. Life cycle listed: annual, biennial. Container use is explicitly listed in the source.
Source: NC State Extension Plant Toolbox: Brassica rapa Rapifera Group
Check the container and watering record
Where container use is listed, confirm the exact cultivar’s intended pot, drainage and medium with the nursery. A garden plant’s descriptive width does not determine a pot diameter or root-volume requirement. For dwarf trees, keep the named rootstock or compact cultivar dimensions with that record.
Observe the medium and follow the selected plant’s care instructions. A source describing moist soil does not supply a weekly irrigation volume. Pot size, plant size, medium and exposure belong in the watering record. Calculate litres only after the selected pot’s remaining fill has been measured.
Build a local planting calendar
Record your location, the selected cultivar and whether the purchase is seed, dormant stock or an actively growing plant. Obtain the local sowing or transplanting window for that material from the regional extension service or nursery. Record that window separately from the flowering season shown in the reference. Frost exposure, soil workability and the crop form can make a month from another region unsuitable.
For mixed orders, keep separate rows for each selection, its planned date, supplied along-row and across-row spacing and replacements. A species-wide width or a hardiness-zone label is insufficient to choose all of those values. This plan uses nursery or local guidance and contains no pesticide or nutrient treatment.
Turn the selected plan into a plant and bag order
For an independent illustrative 2 m by 1 m bed, supplied margins of 0.25 m on all sides and supplied spacings of 0.5 m in each direction produce four positions by two positions: eight plants. These are arithmetic inputs, not recommended spacings for the plants above. If the approved selection is sold in four-plant packs, the order is two packs.
For a separate container order with three measured empty-fill requirements of 8 L each, the total is 24 L. One selected 40 L bag covers the stated volume before any separately supplied allowance. The Soil Calculator calculates litres; it does not choose the growing medium, the container or a load-bearing location.
Use the matching calculator
Use this decision sequence
- Identify the exact species, crop type and cultivar or rootstock.
- Check the relevant source and local nursery guidance for growing conditions and planting window.
- Record supplied plant spacings or the selected container’s measured fill.
- Calculate positions and whole purchase packs separately for each selection.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Botanical record | A named example or genus record, not identification of an unknown plant. |
| Mature width | Descriptive size, separate from the selected planting spacing. |
| Planting date | A local window for the actual seed, dormant stock or transplant. |
| Watering | A plant and medium care decision, not the bed’s geometric volume. |
Worked comparison
A supplied four-by-two position plan contains eight plants and needs two four-plant packs. A separate three-pot order with 8 L of measured empty fill per pot needs 24 L of the selected medium, covered by one 40 L bag before any separately selected allowance.
Check before using the estimate
Check the exact cultivar and local restrictions before ordering. No species-wide figure establishes container fit, edible identity, support strength or planting success.
All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.
Sources and product references
- NC State Extension: Beta vulgaris Garden Beet Group
- NC State Extension: Daucus carota subsp. sativus
- NC State Extension: Pastinaca sativa
- NC State Extension: Solanum tuberosum
- NC State Extension: Raphanus raphanistrum subsp. sativus
- NC State Extension: Ipomoea batatas
- NC State Extension: Brassica rapa Rapifera Group
References support the factual distinctions and scope described above. Growing guidance is regional and care instructions are product-specific. Worked numerical examples are independent illustrative arithmetic.
Calculation and scope checked 2026-10-13. Methods and scope.
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