Plant sweet potato slips about 12–18 inches apart in rows 3–4 feet apart for healthy vines and good-sized tubers.

Quick Scoop

  • Typical spacing: 12–18 inches between plants in the row.
  • Row spacing: 36–48 inches between rows so vines can spread and you can walk between.
  • Compact/bushy types (like Porto Rico): you can go a bit closer, around 12–15 inches.
  • Big vining types (like Beauregard, Covington): aim for 15–18 inches or even up to 24 inches if you want extra-large roots.
  • In cooler, short-season areas, slightly closer spacing (around 12 inches) can help the soil warm and boost yields; in hot long-season climates, a bit wider spacing reduces disease risk.

Simple Rules You Can Use

  1. If you don’t know the variety
    • Go with 12–18 inches between slips and 3–4 feet between rows as a safe default.
  1. For maximum yield per square foot
    • Use 12–15 inches between plants, keep rows around 3 feet, and be ready to prune or guide vines.
  1. For fewer but larger sweet potatoes
    • Space plants 18–24 inches apart so each plant has more room to size up tubers.
  1. In raised beds
    • Treat a 4‑foot-wide bed like two close rows: plant slips 12–18 inches apart in a staggered (zigzag) pattern across the bed.
  1. In hills or mounds
    • You can plant 3–4 slips on a mound, about 6–8 inches apart on that hill, with hills themselves spaced a few feet apart.

Why Spacing Matters (In Plain Terms)

Sweet potatoes send roots sideways and vines outward, so if they are too close, they compete for light and space and tend to make more vines than tubers, often smaller and more stringy. Give them enough room and sunlight reaches the soil, air flows through the foliage, and you get plumper, healthier roots with less risk of fungal disease.

A helpful mental picture: imagine each plant needing a circle about 2 feet wide underground and several feet of vine above ground; your spacing is just making sure those circles overlap only a little, not a lot.

Little Extras for Better Results

  • Keep planting depth around 4 inches in loose, well-drained soil.
  • In heavy clay soils, widen spacing slightly to reduce waterlogging and rot risk.
  • As the season goes on, watch whether vines are crowding; if plants are jammed together by midseason, you can thin a few to help the rest size up.

If you’re ever in doubt, 12–18 inches between plants and 3–4 feet between rows is the “can’t go wrong” answer for how far apart to plant sweet potatoes.

TL;DR: Plant sweet potatoes 12–18 inches apart in rows 3–4 feet apart; go closer for compact varieties and slightly wider for big vining types or extra- large roots.

Information gathered from public forums or data available on the internet and portrayed here.