DavidSweet potatoes are a nutritious and versatile crop that can be grown in various climates and soil conditions. To ensure healthy growth and high yields, it is essential to use the right fertilizer. Choosing the best fertilizer for sweet potatoes can be challenging, as different varieties and growing conditions require specific nutrient requirements.
From organic to synthetic, liquid to granular, and balanced to specialized, we have covered all types of fertilizers that can enhance your sweet potato crop’s health and productivity. Read on to discover the perfect fertilizer for your sweet potato garden.
12 Best Fertilizer For Sweet Potato
Considering that there are numerous fertilizer available in the market, we have successfully compiled 12 best fertilizer for sweet potato.
The list comprises of both organic and inorganic fertilizer which includes Compos, Poultry dung manure, Bone meal, Jack’s Classic 10-20-20 All Purpose Fertilizer, Schultz All Purpose 20-20-20 Plant Food, Cattle Dung Manure, Straw and or Untreated Grass Clipping, Seaweed.
#1. Compost
Category: Organic Fertilizer
Compost is an organic fertilizer that is widely used in sweet potato cultivation. It is made by decomposing plant and animal matter, resulting in a nutrient-rich soil amendment that can improve soil structure, water retention, and microbial activity.
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Compost is an excellent source of macro and micronutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, and zinc, which are essential for sweet potato growth and yield.
Compost is easy to use and can be applied to the soil surface or incorporated into the soil before planting. It is also an environmentally friendly option, as it reduces the amount of waste sent to landfills and minimizes the need for synthetic fertilizers.
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#2. Poultry Dung Manure
Category: Organic Fertilizer
Poultry dung manure is another organic fertilizer that can benefit sweet potato cultivation.
It is made by composting chicken manure and bedding material, resulting in a nutrient-rich soil amendment that can improve soil structure, fertility, and water-holding capacity.
Poultry dung manure is an excellent source of nitrogen, phosphorus, potassium, and other essential nutrients that sweet potatoes need to thrive.
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Poultry dung manure is easy to use and can be applied directly to the soil or mixed with other organic materials such as compost or straw.
It is also a cost-effective option, as chicken manure is readily available and can be obtained from local farms or garden centers.
However, it is essential to use poultry dung manure carefully, as it can be high in salts and pathogens, which can harm sweet potatoes if applied in excessive amounts.
#3. Peters Professional 20-20-20 General Purpose Fertilizer
Category: Inorganic Fertilizer
If you’re looking for an inorganic fertilizer that can provide a balanced nutrient composition for your sweet potato crop, Peters Professional 20-20-20 General Purpose Fertilizer might be a good option.
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This water-soluble fertilizer contains equal parts of nitrogen, phosphorus, and potassium (NPK) that can promote healthy foliage growth, root development, and flower production.
This fertilizer is easy to use and can be applied through foliar sprays or root drenches. It can also be used in drip irrigation systems or hydroponic setups.
Peters Professional 20-20-20 General Purpose Fertilizer is a highly concentrated formula, which means that only a small amount is needed to achieve the desired results.
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#4. Bone meal
Category: Organic Fertilizer
Bone meal is an organic fertilizer that can benefit sweet potato growth and yield. It is made by grinding animal bones into a fine powder that is rich in calcium, phosphorus, and other micronutrients that sweet potatoes need for healthy growth.
Bone meal is easy to use and can be added to the soil before planting or applied as a top dressing during the growing season. It can also improve soil structure and water retention, which can benefit sweet potatoes’ overall health.
Bone meal is an excellent source of phosphorus, which is essential for sweet potato tuber development. It is also a slow-release fertilizer, which means that it can provide a steady supply of nutrients over time.
However, it is important to use bone meal carefully, as excessive amounts can lead to phosphorus toxicity and harm sweet potato growth.
#5. Jack’s Classic 10-20-20 All Purpose Fertilizer
Category: Inorganic Fertilizer
If you’re searching for an inorganic fertilizer that can provide a balanced nutrient composition for your sweet potato crop, Jack’s Classic 10-20-20 All Purpose Fertilizer might be a good choice.
This water-soluble fertilizer contains a balanced ratio of nitrogen, phosphorus, and potassium (NPK) that can promote healthy growth and development in sweet potatoes.
This fertilizer is easy to use and can be applied through foliar sprays or root drenches. It is also a highly concentrated formula, which means that only a small amount is needed to achieve the desired results.
Jack’s Classic 10-20-20 All Purpose Fertilizer is suitable for use in both soil and hydroponic setups.
#6. Schultz All Purpose 20-20-20 Plant Food
Category: Inorganic Fertilizer
Schultz All Purpose 20-20-20 Plant Food is another inorganic fertilizer that can benefit sweet potato cultivation.
This water-soluble fertilizer contains equal parts of nitrogen, phosphorus, and potassium (NPK), which can promote balanced growth and development in sweet potatoes.
This fertilizer is easy to use and can be applied through foliar sprays or root drenches. It is also suitable for use in both soil and hydroponic setups.
Schultz All Purpose 20-20-20 Plant Food is a highly concentrated formula, which means that only a small amount is needed to achieve the desired results.
#7. Cattle Dung Manure
Category: Organic Fertilizer
If you’re looking for an organic fertilizer that can benefit your sweet potato crop, cattle dung manure might be a good option.
This fertilizer is made from cow manure, which is a rich source of nitrogen, phosphorus, and potassium (NPK), as well as other micronutrients that sweet potatoes need for healthy growth.
Cattle dung manure is easy to use and can be added to the soil before planting or applied as a top dressing during the growing season.
It can also improve soil structure and water retention, which can benefit sweet potatoes’ overall health. This fertilizer is suitable for use in both small-scale and large-scale farming.
However, it is important to note that cattle dung manure can be odorous and attract flies if not properly handled.
It is also important to ensure that the manure is aged or composted before use to prevent the introduction of harmful pathogens to the soil.
#8. Miracle-Gro Water Soluble All Purpose Plant Food 20-20-20
Category: Inorganic Fertilizer
Miracle-Gro Water Soluble All Purpose Plant Food 20-20-20 is an inorganic fertilizer that can provide balanced nutrition to your sweet potato crop.
This water-soluble fertilizer contains equal parts of nitrogen, phosphorus, and potassium (NPK), which can promote healthy growth and development in sweet potatoes.
This fertilizer is easy to use and can be applied through foliar sprays or root drenches. It is also a highly concentrated formula, which means that only a small amount is needed to achieve the desired results.
Miracle-Gro Water Soluble All Purpose Plant Food 20-20-20 is suitable for use in both soil and hydroponic setups.
#9. Straw and or Untreated Grass Clipping
Category: Organic Fertilizer
If you’re looking for a natural and cost-effective fertilizer for your sweet potato crop, straw and/or untreated grass clippings can be a good option.
These materials are rich in carbon and can provide slow-release nutrients to sweet potatoes as they decompose.
To use straw and grass clippings as a fertilizer, simply spread a layer of the material around the base of the sweet potato plants.
This can help retain moisture in the soil and suppress weeds while providing a source of nutrients to the plants. This fertilizer is also easy to obtain, especially if you have a lawn or access to farm animal bedding.
However, it is important to note that straw and grass clippings may not contain all of the nutrients that sweet potatoes need.
They may also take longer to decompose and release their nutrients compared to other fertilizers.
Therefore, it is recommended to supplement with additional fertilizers as needed.
#10. Grow More 20-20-20 All Purpose Fertilizer
Category: Inorganic Fertilizer
This fertilizer contains equal parts of nitrogen, phosphorus, and potassium (NPK), as well as other micronutrients that sweet potatoes need for healthy growth.
This fertilizer is easy to use and can be applied as a foliar spray or root drench. It is also a highly concentrated formula, which means that only a small amount is needed to achieve the desired results.
Grow More 20-20-20 All Purpose Fertilizer is suitable for use in both soil and hydroponic setups.
#11. Seaweed
Category: Organic Fertilizer
Seaweed is an excellent organic fertilizer for sweet potatoes, as it is rich in essential micronutrients, such as iron, zinc, and manganese that are necessary for plant growth. It is also a good source of potassium, which can help sweet potatoes resist stress and disease.
Using seaweed as a fertilizer is easy. You can purchase it in various forms, such as dried or liquid, and apply it to the soil or foliage of the sweet potato plants.
It can also be used as a soil amendment to improve soil structure and nutrient availability.
In addition to its nutrient content, seaweed has other benefits, such as improving soil microbial activity, enhancing root growth, and increasing the plant’s ability to absorb nutrients.
It is also a sustainable option, as it is a renewable resource that can be harvested without harming the environment.
However, it is important to note that seaweed fertilizer may not be widely available in all areas, and it may be more expensive than other organic fertilizers.
It is also important to use it in moderation, as excess application can result in salt buildup in the soil.
#12. Fertilome Triple Action Plus 10-20-10 Fertilizer
Category: Inorganic Fertilizer
Fertilome Triple Action Plus 10-20-10 Fertilizer is an inorganic fertilizer that provides a balanced blend of nutrients to sweet potato plants.
This fertilizer contains higher amounts of phosphorus, which can promote root development and flower and fruit production, as well as potassium, which can help with plant stress resistance.
This fertilizer is easy to use and can be applied as a root drench or foliar spray.
It is also formulated to control pests and diseases, making it a good option for those dealing with these issues in their sweet potato crop.
This fertilizer can be used for other plants, making it a versatile option for gardeners.
Benefits of Applying Fertilizer to Sweet Potato
Applying fertilizer to sweet potato plants can provide many benefits, such as:
- Improved nutrient uptake: Fertilizers provide essential nutrients to the sweet potato plants, which can enhance their growth, yield, and quality.
- Enhanced soil fertility: Fertilizers can improve soil fertility by providing nutrients and improving soil structure, which can increase soil water-holding capacity and aeration.
- Increased pest and disease resistance: Fertilizers can help plants resist pests and diseases by improving their overall health and stress resistance.
- Higher yield: Proper fertilizer application can increase the yield of sweet potatoes, resulting in higher productivity and profitability.
- Better quality: Sweet potatoes grown with the right amount and type of fertilizer can have improved color, texture, and taste.
Disadvantages of Applying Fertilizer to Sweet Potato
While applying fertilizer to sweet potato plants can provide many benefits, there are also some potential drawbacks, such as:
- Over-fertilization: Over-application of fertilizer can lead to nutrient imbalances and toxicities, which can harm the sweet potato plants and reduce yield and quality.
- Environmental pollution: Excessive fertilizer application can lead to nutrient runoff and groundwater contamination, which can harm the environment and human health.
- Cost: Fertilizer application can be costly, especially if high-quality fertilizers are used, which can impact profitability.
- Soil degradation: Excessive fertilizer application can lead to soil degradation, including soil compaction, erosion, and loss of organic matter, which can reduce soil fertility over time.
- Health hazards: Some fertilizers can be hazardous to human health if ingested or inhaled, which can pose a risk to farmers and workers who handle the fertilizers.
How to Apply Organic fertilizer to Sweet Potato
Applying organic fertilizer to sweet potato plants can be done in the following steps:
- Prepare the soil: Before applying organic fertilizer, make sure the soil is loose and moist enough to allow for proper absorption of the nutrients.
- Calculate the required amount: Determine the amount of organic fertilizer required based on the size of the planting area and the specific fertilizer used.
- Apply the fertilizer: Spread the organic fertilizer evenly over the soil surface, and then gently work it into the top 2-4 inches of soil.
- Water the plants: Water the sweet potato plants immediately after applying the fertilizer to help the nutrients soak into the soil.
- Repeat application: Apply organic fertilizer to sweet potato plants every 3-4 weeks during the growing season.
How to Apply Inorganic fertilizer to Sweet Potato
Applying inorganic fertilizer to sweet potato plants can be done in the following steps:
- Prepare the soil: Similar to organic fertilizer, the soil should be prepared before applying inorganic fertilizer.
- Determine the amount required: Calculate the required amount of inorganic fertilizer based on the size of the planting area and the specific fertilizer used.
- Apply the fertilizer: Spread the inorganic fertilizer evenly over the soil surface, and then gently work it into the top 2-4 inches of soil.
- Water the plants: Water the sweet potato plants immediately after applying the fertilizer to help the nutrients soak into the soil.
- Repeat application: Apply inorganic fertilizer to sweet potato plants every 2-3 weeks during the growing season.
Factors to Consider when Choosing Fertilizer for Sweet Potato
When selecting fertilizer for sweet potatoes, it is important to consider the following factors:
- Nutrient composition: Look for fertilizers that contain the essential nutrients required by sweet potato plants, such as nitrogen, phosphorus, and potassium.
- Soil type: Consider the type of soil you are working with, as certain fertilizers may be more effective in different soil types.
- Cost: Determine the cost of the fertilizer and weigh it against the potential yield increase and other benefits.
- Plant stage: Different fertilizers may be more effective at different stages of plant growth, so choose one that is appropriate for the current stage of your sweet potato plants.
- Environmental impact: Consider the potential impact of the fertilizer on the environment, including runoff and groundwater contamination.
When to Apply Fertilizer to Sweet Potato
Fertilizer should be applied to sweet potato plants at different stages of growth. The following are general guidelines:
- Pre-planting: Apply fertilizer to the soil before planting to provide nutrients to the sweet potato plants during early growth.
- Early growth: Apply fertilizer when the plants are about 3-4 weeks old.
- Vegetative growth: Apply fertilizer during the vegetative growth stage when the sweet potato plants are actively growing.
- Bulking: Apply fertilizer when the sweet potatoes start to form to promote growth and yield.
- Late growth: Stop applying fertilizer when the sweet potatoes are about four weeks from harvest to prevent the accumulation of nitrates in the tubers.
Where to Buy Organic Fertilizer
Organic fertilizer for sweet potatoes can be purchased from a variety of sources, including:
- Garden centers and nurseries: These stores often carry a selection of organic fertilizers.
- Online retailers: Many online retailers sell organic fertilizers and offer delivery to your doorstep.
- Farmers’ markets: Local farmers may sell organic fertilizers made from their own crops.
- Agricultural supply stores: These stores may carry a selection of organic fertilizers designed for use on crops like sweet potatoes.
Sweet Potato Fertilizer Program PDF
A sweet potato fertilizer program is a detailed plan that outlines the steps necessary to achieve optimum sweet potato growth and yield.
A sweet potato fertilizer program PDF can be a useful resource for growers as it provides information on the best fertilizers to use, when to apply them, and in what amounts.
It also includes tips on soil preparation, watering, and pest control.
Potassium Fertilizer For Sweet Potatoes
Potassium is an essential nutrient for sweet potatoes as it plays a critical role in root development, water uptake, and disease resistance.
Potassium fertilizer for sweet potatoes can be inorganic or organic. Inorganic potassium fertilizers include muriate of potash and sulfate of potash.
Organic sources of potassium include wood ash, greensand, and kelp meal. It is recommended to apply potassium fertilizer during the early stages of growth and development.
Sweet Potato Fertilizer Requirements
Sweet potatoes have specific fertilizer requirements for optimal growth and yield.
They require high levels of potassium, moderate levels of nitrogen, and low levels of phosphorus.
Soil testing is essential in determining the specific fertilizer requirements for a sweet potato crop.
It is recommended to apply fertilizers in small amounts and at regular intervals throughout the growing season.
How To Increase Sweet Potato Yield
There are several ways to increase sweet potato yield, and one of them is through proper fertilization.
Applying the right amount and type of fertilizer is essential for increasing sweet potato yield.
Other factors to consider include soil preparation, planting density, proper watering, and pest control.
Crop rotation, use of high-quality seed, and adequate sunlight are also essential for increasing sweet potato yield.
Sweet Potato Fertilizer Homemade
Homemade sweet potato fertilizer is an inexpensive and natural alternative to commercial fertilizers.
Common ingredients used in homemade sweet potato fertilizers include kitchen waste, such as banana peels, eggshells, and coffee grounds.
Other organic sources of fertilizer include manure, compost, and worm castings.
Homemade fertilizers can be applied directly to the soil or made into a tea for easy application.
How Often To Water Sweet Potatoes
Sweet potatoes require adequate water to grow and produce a high yield. The frequency of watering sweet potatoes depends on several factors, including soil type, temperature, and rainfall.
In general, sweet potatoes require regular watering throughout the growing season, especially during hot and dry periods.
It is recommended to water sweet potatoes deeply once a week and increase frequency during periods of drought.
Fertilizer Application For Sweet Potato
Proper fertilizer application for sweet potatoes is essential for achieving optimum growth and yield.
It is recommended to apply fertilizers in small amounts and at regular intervals throughout the growing season.
Fertilizer should be applied at a distance of 6-8 inches from the base of the plant to prevent burning.
It is also essential to water the plants immediately after fertilizer application to avoid fertilizer burn.
Conclusion
Choosing the right fertilizer is crucial for sweet potato cultivation, and our list of the 12 best fertilizers for sweet potatoes can help you make an informed decision. Remember to consider the nutrient requirements of your sweet potato variety and growing conditions before selecting a fertilizer. With the right fertilizer, you can enjoy a bountiful harvest of nutritious sweet potatoes.
