Sweet potato planting in Georgia depends on soil temperature reaching at least 60°F at a four-inch depth. Knowing exactly When To Plant Sweet Potatoes In Georgia can mean the difference between a bumper crop and a disappointing harvest. This guide walks you through everything you need to know for perfect timing.
Georgia’s climate is ideal for sweet potatoes, but they are sensitive to cold. Plant too early, and the slips may rot or get stunted. Plant too late, and you might run out of growing days before the first frost.
Let’s break down the best planting window, step by step.
When To Plant Sweet Potatoes In Georgia
The optimal time to plant sweet potatoes in Georgia is from mid-April to late May. This varies slightly depending on your specific region within the state.
North Georgia, with its cooler springs, usually needs to wait until early May. South Georgia can often start in mid-to-late April. The key is always the soil temperature, not just the calendar date.
Soil Temperature Is The Real Key
Sweet potatoes are tropical plants. They thrive in warmth and hate cold feet. If the soil is below 60°F, the slips will just sit there. They might even rot before they start growing.
Use a soil thermometer to check. Insert it four inches deep in the morning. Wait for a consistent reading above 60°F for at least three days in a row before planting.
How To Warm Soil Faster
If you are eager to plant early, you can warm the soil artificially. Cover your planting beds with black plastic mulch a few weeks before you intend to plant. This traps solar heat and raises the soil temperature by several degrees.
Another trick is to create raised beds. They drain better and warm up faster than flat ground. This is especially helpful in North Georgia’s heavier clay soils.
Regional Planting Calendar For Georgia
Georgia is a large state with three main growing regions. Here is a simple breakdown for each:
- South Georgia (Zone 8b-9a): Plant from mid-April to early May. Soil warms up quickly here. You can sometimes push it to late April without much risk.
- Central Georgia (Zone 8a): Plant from late April to mid-May. This is the sweet spot for most of the state. Watch the weather forecast for late cold snaps.
- North Georgia (Zone 7a-7b): Plant from early May to late May. Frost can occur into early May in the mountains. Be patient and wait for consistent warmth.
Remember that these are guidelines. Always check your local frost dates and soil temperature. A late frost in early May can kill tender sweet potato slips.
How To Prepare For Planting
Good timing is only half the battle. You also need to prepare your soil and slips correctly. This ensures your plants get off to a strong start.
Choosing The Right Slips
You do not plant sweet potato seeds. You plant slips, which are rooted sprouts from a mature sweet potato. Buy slips from a reputable nursery or grow your own.
Look for slips that are 6 to 9 inches tall with healthy green leaves. Avoid slips that look leggy, yellow, or have damaged stems. Healthy slips transplant better and grow faster.
Hardening Off Your Slips
If you buy slips by mail, they have been in a dark box for days. They need to adjust to outdoor conditions. This process is called hardening off.
Place the slips in a shaded, sheltered spot for a day. Then gradually expose them to more sun over 3 to 5 days. Water them well during this time. This reduces transplant shock.
Soil Preparation Steps
Sweet potatoes prefer loose, well-draining soil. Heavy clay or compacted soil will produce small, misshapen roots. Here is how to prepare your bed:
- Choose a sunny spot with at least 6 to 8 hours of direct sunlight daily.
- Loosen the soil to a depth of 10 to 12 inches. Remove rocks and large clumps.
- Mix in 2 to 3 inches of aged compost or well-rotted manure. This adds organic matter and nutrients.
- Avoid high-nitrogen fertilizers. They cause lush vines but small roots. Use a balanced 5-10-10 fertilizer instead.
- Form raised rows or mounds about 8 inches high. This improves drainage and warms the soil faster.
Test your soil pH. Sweet potatoes prefer a pH between 5.8 and 6.2. If your soil is too acidic, add lime a few months before planting.
Planting Your Sweet Potato Slips
Once the soil is ready and the temperature is right, it is time to plant. This process is straightforward but requires care.
Step-By-Step Planting Instructions
- Water the slips thoroughly before removing them from their container.
- Dig a hole deep enough to bury the stem up to the top leaves. Remove the lower leaves from the slip.
- Place the slip in the hole at a slight angle. The roots should point downward.
- Fill the hole with soil and firm it gently around the stem. Do not pack it too tightly.
- Water the slip immediately to settle the soil and remove air pockets.
- Space slips 12 to 18 inches apart in rows that are 3 to 4 feet apart.
Plant on a cloudy day or in the late afternoon. This reduces stress from direct sun. If you must plant on a sunny day, provide temporary shade for a few days.
Dealing With Late Cold Snaps
Even with perfect timing, Georgia weather can surprise you. A late cold snap in May is possible. If frost is forecasted, cover your new slips with row covers or old sheets overnight.
Remove the covers in the morning when temperatures rise. Do not leave them on for more than a day or two, as this can trap heat and cause disease.
Caring For Sweet Potatoes After Planting
Once your slips are in the ground, they need consistent care. Sweet potatoes are relatively low-maintenance, but they have specific needs.
Watering Requirements
Sweet potatoes need about 1 inch of water per week. This is especially important during the first few weeks after planting. Keep the soil consistently moist but not waterlogged.
Too much water can cause root rot. Too little water leads to small, tough roots. Use a soaker hose or drip irrigation to water at the base. Avoid wetting the leaves to prevent fungal diseases.
Mulching For Moisture And Weed Control
Apply a 2 to 3 inch layer of organic mulch around the plants. Straw, shredded leaves, or grass clippings work well. Mulch helps retain soil moisture and keeps weeds down.
Weeds compete with sweet potatoes for nutrients and water. Keep the bed weed-free, especially in the first month. Once the vines spread, they will shade out most weeds.
Fertilizing During The Growing Season
Sweet potatoes are light feeders. Too much fertilizer, especially nitrogen, will produce huge vines but tiny roots. A single application of a balanced fertilizer at planting is usually enough.
If your soil is poor, you can side-dress with a low-nitrogen fertilizer about 4 to 6 weeks after planting. Use a 5-10-10 or similar formula. Apply it along the rows and water it in.
Managing Pests And Diseases
Sweet potatoes in Georgia face a few common pests. The most troublesome are wireworms, flea beetles, and sweet potato weevils. Rotate your crops each year to reduce pest buildup.
Fungal diseases like fusarium wilt can also occur. Plant disease-resistant varieties and ensure good drainage. Remove any infected plants immediately to prevent spread.
When To Harvest Sweet Potatoes In Georgia
Knowing when to plant is important, but so is knowing when to harvest. Sweet potatoes need about 90 to 120 days to mature, depending on the variety.
Signs Your Sweet Potatoes Are Ready
You can start checking for maturity around 90 days after planting. Look for these signs:
- The leaves start to yellow and die back slightly.
- The vines begin to thin out.
- The soil around the base of the plant may crack slightly.
Dig up a test root to check its size. A good sweet potato should be 4 to 6 inches long and about 2 inches in diameter. If they are still small, wait another week or two.
Harvesting Before The First Frost
In Georgia, the first frost usually occurs in October or November, depending on your region. You must harvest before the first hard frost. Cold damage can ruin the roots.
Cut the vines back a few days before harvest. This makes digging easier and signals the plants to stop growing. Use a garden fork to gently lift the roots from the soil.
Be careful not to bruise or cut the sweet potatoes. Damaged roots will not store well. Handle them gently and brush off excess soil, do not wash them.
Curing And Storing Sweet Potatoes
Freshly dug sweet potatoes are not very sweet. They need to cure to develop their full flavor and sweetness. Curing also heals minor cuts and extends storage life.
How To Cure Sweet Potatoes
Curing requires warm temperatures and high humidity. The ideal conditions are 80°F to 85°F with 85% to 90% humidity for 10 to 14 days.
If you do not have a curing room, you can use a warm, dark closet or a greenhouse. Place the sweet potatoes in a single layer in a cardboard box or on a wire rack. Do not stack them.
After curing, move them to a cool, dark place for long-term storage. The ideal storage temperature is 55°F to 60°F with moderate humidity. A basement or root cellar works well.
Common Storage Mistakes
Do not store sweet potatoes in the refrigerator. Cold temperatures below 50°F cause chilling injury. This makes them hard in the center and ruins the flavor.
Also, avoid storing them near apples or other fruits. These fruits release ethylene gas, which can cause sweet potatoes to spoil faster. Check stored roots regularly and remove any that show signs of rot.
Best Sweet Potato Varieties For Georgia
Choosing the right variety can make your planting more successful. Some varieties are better suited to Georgia’s climate than others.
Top Recommended Varieties
- Beauregard: This is the most popular variety in Georgia. It matures in 90 to 100 days. It produces large, uniform roots with deep orange flesh. It is disease-resistant and reliable.
- Covington: This variety matures in 100 to 110 days. It has a slightly sweeter flavor than Beauregard. It stores well and is a favorite for home gardeners.
- Georgia Jet: As the name suggests, this variety was developed for Georgia. It matures in 90 days and is very early. It produces good yields even in cooler northern areas.
- Purple: For something different, try a purple variety like Okinawan or Stokes. They have a nuttier flavor and are packed with antioxidants. They need a longer growing season, about 120 days.
All these varieties perform well in Georgia’s heat and humidity. Buy slips from a local supplier to ensure they are adapted to your area.
Frequently Asked Questions
Here are answers to common questions about planting sweet potatoes in Georgia.
Can I Plant Sweet Potatoes In Georgia In June?
Yes, you can plant in June, but it is late. You need a short-season variety like Georgia Jet. The harvest will be smaller, and you risk frost damage before the roots mature. It is better to plant by late May.
What Happens If I Plant Sweet Potatoes Too Early?
If you plant when soil is below 60°F, the slips may rot or grow very slowly. They can also get stunted by cold stress. You will end up with fewer and smaller roots. Always wait for warm soil.
Do Sweet Potatoes Need Full Sun In Georgia?
Yes, they need at least 6 to 8 hours of direct sunlight daily. Less sun means fewer leaves for photosynthesis. This results in smaller roots. Choose the sunniest spot in your garden.
How Deep Should I Plant Sweet Potato Slips?
Plant them deep enough to cover the stem up to the top leaves. Remove the lower leaves first. The buried stem will develop roots along its length. This gives you a stronger plant.
Can I Grow Sweet Potatoes In Containers In Georgia?
Yes, you can grow them in large containers. Use a pot that is at least 15 gallons in size. Fill it with loose, well-draining potting mix. Follow the same planting and care instructions. Harvest will be smaller than in-ground plants.
Final Tips For Success
Planting sweet potatoes at the right time is the most important step. But a few extra tips can boost your harvest.
Rotate your sweet potato patch every year. Do not plant them in the same spot for at least three years. This prevents soil-borne diseases from building up.
Keep the vines from rooting at the nodes. If vines touch the ground, they will root and form small potatoes. This diverts energy from the main roots. Lift the vines occasionally to prevent this.
Water deeply but infrequently. Deep watering encourages roots to grow deep into the soil. Shallow watering leads to shallow roots that dry out quickly.
Harvest on a dry day. Wet soil makes digging messy and increases the chance of damaging the roots. Let the soil dry out for a few days before you start digging.
With the right timing and care, you can enjoy a bountiful harvest of sweet potatoes from your Georgia garden. Start checking your soil temperature in mid-April, and you will be on your way to a successful crop.
Remember, patience is key. Wait for that 60°F soil temperature, and your sweet potatoes will reward you with delicious, nutritious roots all winter long. Happy planting