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Sweet Potatoes

Sweet Potatoes growing guidance with clear planting, care and harvest expectations.

Grows in Zones 4–12Growing guide
Sweet Potatoes growing or ready to harvestPhoto: User:Vmenkov · CC BY-SA 3.0

Set your expectations

How long until you can harvest?

About 90–120 days from planting slips
Cold-weather noteCold tolerance varies widely, from hardy asparagus to tropical taro and vanilla.
Start withCrowns, roots, divisions, slips or young plants
Life cyclePerennial or long-season crop
DifficultyModerate

Your seasonal plan

When to grow sweet potatoes in Zone 6.

Planting usually begins later in spring than it does in warmer zones. These are useful planning windows, not exact weather guarantees.

Typical planting windowApril–May
Typical harvest windowOctober–December

Growing essentials

What sweet potatoes need to thrive.

Use the practical details below with your Zone 6 timeline. Current weather and the variety you choose can shift timing.

LightFull sun unless the crop is naturally shade-tolerant
SoilDeep, fertile, well-drained soil prepared before planting
Planting depthSlips 3–4 in deep
Spacing12–18 in; rows 3–4 ft
WaterKeep evenly moist during establishment; established plants still need water during active growth.
Best conditionsPerennial; match the variety and dormancy needs to the local climate.

How to plant

Plant it well.

Plant crowns, divisions or roots at the species-specific depth in a permanent bed.

Indoors or containers

Best outdoors in a permanent bed or very large seasonal container.

Keep it growing

Care through the season.

  • Control perennial weeds before planting.
  • Mulch after growth begins and spread compost around the plant annually.
  • Allow the plant to build reserves before taking a full harvest.
What to avoid

Harvesting too heavily before the plant has built a strong root system.

Ready to harvest

Know the cue, not just the date.

  • Dig before frost when roots reach useful size; cure warm and humid before storage.
  • Harvest during the cool part of the day when practical. Use clean tools, then cool, store or use the harvest promptly.

How we know

Sources and growing guidance.

The growing essentials and seasonal planning windows are original summaries informed by university Extension references; always adjust for current local weather and variety instructions.

Vegetable planting and garden planningUniversity of Minnesota ExtensionFlorida Vegetable Gardening GuideUniversity of Florida IFAS Extension

Growing essentials compiled · November 2026