How and When to Fertilize Potatoes? Nourish Them Properly to Have Those Delicious Chips!

by Snezhana Besarabova
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Potatoes are a versatile and nutritious addition to many diets around the world. To ensure a bountiful harvest, it’s important to provide them with the right nutrients before their planting and while they grow. Doing this properly, you can significantly enhance the potatoes’ yield. In this process, including homemade fertilizers in the nutrition regime is welcome and ensures a more healthy and environmentally friendly production. Continue reading to know what are the best nutrition solutions for these tasty plants, and have your guidance on how and when to fertilize potatoes, both in the garden, and in containers.

What Fertilizer is Best for Potatoes?

how and when to fertilize potatoes nourish them throughout the growing season

Potatoes have specific nutrient requirements to grow, flourish and yield abundantly. When selecting a fertilizer for them, it’s essential to choose one with a balanced NPK (nitrogen, phosphorus, and potassium) ratio. An ideal one for these plants are the following formulations: 5:10:10 or 10:20:20 (nitrogen:phosphorus:potassium). They provide the necessary nutrients for healthy foliage growth, root development, as well as for tuber formation.

Homemade Potato Fertilizer

home made potatoes fertilizer preparing compost

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If you prefer a natural approach or want to reduce reliance on chemicals, homemade potato fertilizers can be a great possibility. Here are a few options to choose from:

  • Compost: This valuable organic fertilizer is rich in nutrients. Prior to planting, mix well-rotted compost into the soil to improve its fertility. This addition will help to retain moisture, promote soil structure, and provide slow-release nutrients throughout the growing season.
  • Manure: This organic substrate can be an excellent source of nutrients for potatoes, in case it’s well-aged. It’s crucial to ensure that the manure is fully decomposed to prevent burning the plants. Apply it during soil preparation or as a side dressing after planting.
  • Fish emulsion: It is high in nitrogen and natural. Apply it as a foliar spray or directly to the soil around the plants. Fish emulsion provides an immediate nutrient boost, promoting healthy foliage growth.

Do You Fertilize Potatoes When Planting?

how and when to fertilize potatoes mix some compost in the soil before planting

Fertilizing potatoes at planting time is essential for their initial development. Prepare the soil by removing any weeds or debris. Mix a balanced, slow-release fertilizer into it, according to the package instructions. This will provide a steady supply of nutrients to the growing plants as they establish their root systems.

Do You Fertilize Potatoes When They Flower?

do you fertilize potatoes when they flower they need potassium for the tubes

Feeding up potatoes during flowering is beneficial as it supports tuber development and overall plant vigor. At this stage, switch to a fertilizer with a higher potassium content. Potassium promotes root development, disease resistance, and improves tuber quality. Apply it as a side dressing, avoiding direct contact with the foliage, to minimize the risk of burning the leaves.

How Often to Fertilize Potatoes?

how and when to fertilize potatoes add manure in the soil

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These plants need regular feeding throughout their growth cycle. Here’s a suggested fertilization schedule:

  1. Pre-planting: Add compost or well-rotted manure into the soil.
  2. When planting: Use a balanced, slow-release fertilizer.
  3. At mid-season: When the plants reach about 6 in (15 cm) in height, apply a nitrogen-rich one to boost foliage growth.
  4. Flowering stage: Switch to a high-potassium fertilizer to promote tuber development.
  5. Repeat every 4–6 weeks: Apply a balanced nutrition or compost tea to maintain nutrient levels and support continued growth.

How to Fertilize Potatoes in Containers?

how to grow potatoes in containers water and fertilize regularly

Potatoes can be successfully grown in containers, making them an excellent option for gardeners with limited space. This kind of growing these delicious plants follows a similar approach to traditional beds, but requires additional attention to ensure adequate nutrition. Here’s the way how to fertilize potatoes in containers:

  1. Take the container: Choose one with a capacity of at least 10–15 gallons (38-67 L) to provide ample space for the potato plants to grow and develop a healthy root system.
  2. Potting mix: Use a well-draining one that is rich in organic matter. Avoid using garden soil, as it tends to become compacted in containers and may hinder proper drainage.
  3. Slow-release fertilizer: Add it into the potting mix, prior to planting, following the package instructions. This will provide a steady supply of nutrients over time.
  4. Side dressing: As the plants grow, monitor their nutrient requirements. When they reach about 6 in (15 cm) in height, apply a balanced, water-soluble fertilizer or mix a compost tea in the soil as a side dressing. Follow the recommended application rates on the product label.
  5. Regular watering: Container-grown potatoes require consistent moisture. Water the plants thoroughly when the top inch of soil feels dry.
  6. Foliar feeding: In addition to regular watering and side dressing, foliar feeding can provide a quick nutrient boost. Dilute a liquid fertilizer according to the package instructions and spray it directly on the foliage, which will allow the plants to absorb nutrients through their leaves.

what fertilizer is best for potatoes the ballanced one

Fertilizing potatoes correctly is vital for maximizing their growth, yield, and overall health. By following these guidelines, you’ll be well on your way to growing healthy, robust potatoes that will grace your table with deliciousness.

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