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Planting Sweet Potatoes, How to Grow Sweet Potatoes, and Growing Sweet Potatoes

planting sweet potatoesHere are six great tips for planting sweet potatoes in home vegetable gardens to ensure your success!

Learn how to grow and care for sweet potato plants in just 6 easy steps...

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Growing Sweet Potatoes

A long hot season is required when planting sweet potatoes. In fact, no other vegetables are as heat tolerant as the sweet potato plant.

This warm season vegetable crops should be planted in a minimum soil temperature of 60 degrees F although the ideal is 85 degrees F.

The perennial tuber is a relative of the morning glory. The plants resemble tropical vines with colorful pink to purple flowers.

Download Free Garden Planning Worksheets, Garden Diary, Zone Chart, Or Planting Guide

Best Time for Planting Sweet Potatoes

USDA Zone Chart

Download zone chart here!

In springtime, plant when soil has warmed but not exceeding 85 degrees F. In cold winter regions, start seed tubers indoors 6-8 weeks before soil is expected to warm. Dust the cut surfaces with garden lime, then cover each cutting with 4 inches of moist sand and maintain a temperature of 80 degrees F for several weeks.

Reduce the temperature to 70 degrees F when sprouts are 3-4 inches long. Add low nitrogen 5-10-10 fertilizer to garden bed for growing sweet potatoes, working it into the soil to a depth of 6-8 inches a couple of weeks before planting.

planting sweet potatoes

Planting Sweet Potatoes in 6 Easy Steps

1. Plant seed potatoes 2 to 3 inches deep.

2. Spacing of sweet potato plants should be 36 to 48 inches between rows.

3. Space potatoes 10 to 18 inches apart.

4. Leave growing sweet potatoes in hills spaced at 36 inches.

5. Other long cycle root vegetables such as beets, parsnips, and salsify make good companion plantings for growing sweet potatoes.

6. Avoid using high-nitrogen fertilizers, which result in lush foliage but poorly developed spuds.

By the Light of the Harvest Moon...

Many seasoned gardeners have believed through the ages that vegetables should be planted during specific moon phases for best flavor and growth.

For example, the New Zealand Maori culture only begins growing sweet potatoes on the 11th, 27th, and 28th days of the lunar month.

The moon influences all water on Earth; from the tides of the oceans to the movement of water in plants' cells.

A widespread belief among successful planters is that vegetables grown underground, such as sweet potatoes, should be planted in the dark of the moon, when it is waning. This may sound superstitious; but following practical advice has been tried, tested, and works is not necessarily believing in superstition, but using common sense!

Caring for Sweet Potato Plants

  • Maintain a 5.0-6.6 pH level by applying organic compost and garden sulfur.

  • Begin watering once the soil has dried following planting, keeping it moist without allowing any standing water.

  • Do not pinch or cut the vines back.

  • The vines may be trained onto vertical lattice supports or to climb wires strung between sturdy poles.
  • Harvesting Sweet Potatoes

    In an average of 110 to 120 days, growing sweet potatoes will be ready for harvest.

    Beginning at four months, sweet potatoes can be harvested when test diggings reveal fully developed produce.

    If vines begin to wither, turn yellow, or there is a frost, start harvesting immediately.

    Dig carefully with a garden fork, 8-10 inches away from the plant.

    Pull tubers gently from the vines to prevent bruising.

    planting sweet potatoes

    Storage of Sweet Potatoes

  • Cure harvested sweet potatoes in a sunny protected garden area for 3-4 hours.

  • Afterward, move the potatoes to a humid storage place between 80-85 degrees F. for around 2 weeks.

  • Then, store in a dry cool space for 2-6 months or longer.
  • Vegetable Gardening Tip for Sweet Potatoes

    Growing sweet potatoes is an excellent source for providing vitamin A and C to your family.

    Sweet potatoes can be baked, boiled, steamed, mashed, made into holiday pies, or even sliced for making delicious home fries.

    "Planting sweet potatoes when the moon is on the wane, they want to grow down that is plain." ~ Vegetable Gardening Folklore


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