Kohlrabi, a versatile and nutrient-rich vegetable, thrives with the right fertilization. To achieve optimal growth, flavor, and pest resistance, selecting the best fertilizer for kohlrabi is crucial.

Whether you’re growing kohlrabi indoors, in pots, or in garden beds, Fertilizer For Kohlrabi is definitely a great investment.

this guide will help you choose fertilizers tailored to your needs. We’ll cover the best fertilizers for kohlrabi, their application tips, and expert-recommended products to ensure a bountiful harvest.

Tips for Choosing the Best Fertilizer for Kohlrabi

1. Understand Nutrient Ratios: Kohlrabi requires a balanced mix of nitrogen (N), phosphorus (P), and potassium (K). A ratio like 10-10-10 or 5-10-10 is ideal for root and leafy growth.
2. Consider Growing Conditions: If you’re growing indoors or in containers, opt for water-soluble or liquid fertilizers for easy absorption.
3. Organic vs. Synthetic: Organic fertilizers enrich soil health, while synthetic options offer fast-acting results.
4. Application Method: Choose between granular, liquid, or slow-release fertilizers based on your gardening habits.
5. Brand Reliability: Trusted brands like Miracle-Gro, Espoma, and Dr. Earth are known for quality products.

10 Best Fertilizer For Kohlrabi

1. Miracle-Gro Water Soluble All Purpose Plant Food — Best Fertilizer for Kohlrabi

Miracle-Gro Water Soluble All Purpose Plant Food is a top-rated choice for growing kohlrabi. Its balanced 24-8-16 NPK ratio provides essential nutrients for robust growth. This fertilizer dissolves easily in water, making it ideal for quick absorption, whether you’re growing kohlrabi indoors or outdoors.

The formula’s high nitrogen content promotes lush foliage, while phosphorus supports root development. Its water-soluble nature ensures even distribution, reducing the risk of over-fertilization. Use this product every two weeks during the growing season for consistent results.

Manufactured by a trusted brand, Miracle-Gro offers a proven solution for high-yield kohlrabi crops. Its versatility makes it suitable for pots, garden beds, and hydroponic systems.

• Pros:
  • Fast-acting results
  • Easy to mix
  • Balanced nutrient profile
  • Widely available
  • Ideal for containers
  • Trusted brand
  • Boosts growth
• Cons:
  • Synthetic formula
  • May require frequent applications
  • Not organic

2. Espoma Organic Vegetable-Tone Fertilizer — Best Fertilizer for Kohlrabi in Pots

Espoma Organic Vegetable-Tone Fertilizer is tailored for vegetable gardens and container plants. Its 5-10-10 NPK ratio emphasizes phosphorus and potassium, essential for root development and disease resistance in kohlrabi.

This granular fertilizer includes organic ingredients like feather meal and greensand, which improve soil health. It also contains beneficial microbes that enhance nutrient uptake. Simply apply it to the soil and water thoroughly to activate the nutrients.

Espoma’s slow-release formula ensures sustained feeding, making it perfect for busy gardeners. Its organic certification guarantees a safe choice for environmentally conscious growers.

• Pros:
  • Organic
  • Long-lasting
  • Enhances soil health
  • Safe for pets
  • Easy to use
  • Promotes root growth
  • Sustainable
• Cons:
  • Slower results
  • Slight odor
  • Granular format

3. Jobe’s Organics Vegetable & Tomato Fertilizer Spikes — Best Fertilizer for Kohlrabi Indoors

Jobe’s Organics Fertilizer Spikes simplify fertilization for indoor kohlrabi plants. These spikes feature a 2-7-4 NPK ratio, providing a steady release of nutrients directly to the roots. The product’s organic composition, including bone meal and composted manure, ensures a natural approach to feeding kohlrabi.

Perfect for small spaces, these spikes minimize mess and odors. Insert them into the soil around your kohlrabi plants, and they’ll release nutrients gradually over time. The spikes also contain Biozome, a unique microbial formula that supports soil health and reduces the risk of pests.

Jobe’s Fertilizer Spikes are ideal for hassle-free indoor gardening, ensuring your kohlrabi thrives with minimal effort.

• Pros:
  • Organic
  • Easy to use
  • No mess
  • Long-lasting
  • Promotes pest resistance
  • Compact design
  • Suitable for small pots
• Cons:
  • Limited nitrogen
  • May require additional feeding
  • Slow nutrient release

4. FoxFarm Grow Big Liquid Concentrate — Best Fertilizer for Growing Kohlrabi Indoors

FoxFarm Grow Big Liquid Concentrate delivers fast-acting nutrition for vibrant kohlrabi plants. Its 6-4-4 NPK ratio supports balanced growth, with an emphasis on nitrogen for leafy greens. This liquid fertilizer is perfect for indoor gardening, ensuring quick absorption and visible results.

The formula includes micronutrients like iron and magnesium, essential for healthy plant metabolism. Dilute the concentrate in water according to the instructions and apply it to your kohlrabi plants every one to two weeks. Its versatility makes it compatible with soil-based and hydroponic systems.

FoxFarm’s reputation for high-quality fertilizers ensures that your kohlrabi receives the nutrients it needs for a productive harvest.

• Pros:
  • Fast absorption
  • Micronutrient-rich
  • Versatile use
  • Easy application
  • High nitrogen content
  • Boosts foliage
  • Trusted brand
• Cons:
  • Synthetic formula
  • Requires dilution
  • Frequent applications needed

5. Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer — Organic Fertilizer for Kohlrabi Grown Indoors

Dr. Earth Organic 5 Fertilizer is a standout choice for organic gardening enthusiasts. With a 4-6-3 NPK ratio, it delivers balanced nutrition for kohlrabi’s root and leaf development. The organic formula includes fishbone meal, kelp, and alfalfa meal, ensuring a sustainable approach to fertilization.

This fertilizer also contains beneficial soil microbes and mycorrhizae, enhancing nutrient uptake and soil structure. It’s suitable for indoor and outdoor kohlrabi plants, offering flexibility for various growing environments. Apply it every two months for consistent feeding.

Dr. Earth’s commitment to organic and non-GMO practices ensures a safe and eco-friendly choice for kohlrabi cultivation.

• Pros:
  • Organic
  • Sustainable
  • Enhances soil microbes
  • Non-GMO
  • Balanced formula
  • Long-lasting
  • Safe for pets
• Cons:
  • Mild odor
  • Slower acting
  • Granular application

6. Neptune’s Harvest Fish & Seaweed Fertilizer — Best Organic Liquid Fertilizer for Kohlrabi

Neptune’s Harvest Fish & Seaweed Fertilizer offers an excellent organic solution for kohlrabi, especially when you’re looking for liquid fertilizer options. With a balanced NPK ratio of 2-3-1, it provides essential nutrients that support overall plant health. This fertilizer is made from a blend of fish emulsion and seaweed, which are rich in micronutrients, amino acids, and growth-promoting compounds.

Ideal for gardeners who prefer a natural approach, Neptune’s Harvest helps to improve soil structure and boost the plant’s resistance to disease. It’s also perfect for both indoor and outdoor kohlrabi, offering flexibility in various growing environments. Apply it every 2-4 weeks during the growing season for optimal growth.

Pros:

• Organic ingredients
• Rich in micronutrients and amino acids
• Enhances soil health
• Supports disease resistance
• Versatile for indoor and outdoor use

Cons:

• Requires dilution
• Smell may be unpleasant to some
• Frequent applications may be necessary

7. Osmocote Smart-Release Flower & Vegetable Plant Food — Best Slow-Release Fertilizer for Kohlrabi

Osmocote Smart-Release Flower & Vegetable Plant Food is a great option for gardeners looking for a slow-release fertilizer. With a 14-14-14 NPK ratio, it provides a balanced nutrient mix to support steady growth throughout the kohlrabi’s growing season. The smart-release formula ensures that nutrients are available to the plants over a longer period, reducing the need for frequent applications.

This fertilizer is especially useful for gardeners who want to provide a consistent supply of nutrients without the hassle of applying liquid fertilizers regularly. It’s a perfect option for garden beds or containers, and the slow-release formula makes it ideal for those who may forget to fertilize regularly.

Pros:

• Slow-release formula for continuous feeding
• Balanced nutrient profile
• Easy to use
• Reduces frequent fertilizing
• Great for container and garden bed use

Cons:

• Synthetic formula
• May not be as effective in extremely poor soils
• Can leach out if overwatered

8. EarthPods Organic Plant Food Pods — Best Fertilizer Pods for Kohlrabi

EarthPods Organic Plant Food Pods are an innovative, easy-to-use fertilizer option for kohlrabi. These pre-measured, organic fertilizer pods come in a convenient size, making it simple to provide your plants with the right amount of nutrients without any mess. The pods contain a rich blend of organic ingredients, including fish meal, bone meal, and kelp, with a nutrient profile of 5-4-3.

Perfect for gardeners who prefer organic solutions and a mess-free approach, EarthPods ensure that the fertilizer is delivered directly to the roots where it’s needed most. Simply bury the pods into the soil around your kohlrabi plants and water them in. They provide slow, consistent feeding, reducing the need for constant reapplication.

Pros:

• Organic ingredients
• Pre-measured for convenience
• Slow-release formula
• No mess or odor
• Easy to use for beginners

Cons:

• Limited nitrogen content
• Requires proper placement around roots
• Slower results compared to liquid fertilizers

9. GardenTone Organic Fertilizer — Best for Balanced Nutrition for Kohlrabi

GardenTone Organic Fertilizer is an all-purpose, organic fertilizer with a 3-4-4 NPK ratio, offering balanced nutrition for kohlrabi plants. This fertilizer includes ingredients like bone meal, feather meal, and poultry manure, which enrich the soil while providing steady, long-lasting nutrition.

Its balanced formula supports strong root development and encourages healthy leaf growth. GardenTone is ideal for gardeners looking to grow kohlrabi both indoors and outdoors, as its organic composition helps improve soil health and promotes sustainable farming practices. Apply it during planting and reapply as needed for best results.

Pros:

• Organic and environmentally friendly
• Provides balanced nutrition
• Improves soil structure
• Great for both root and leaf growth
• Long-lasting effects

Cons:

• Slower to show results
• Slight odor during application
• Granular format requires more effort than liquid fertilizers

10. Yard Butler Soil Conditioner and Plant Fertilizer — Best for Soil Health and Root Development in Kohlrabi

Yard Butler Soil Conditioner and Plant Fertilizer is designed to improve soil health while providing essential nutrients for plant growth. It is ideal for improving root development and is formulated with an organic blend of ingredients such as fish meal, bone meal, and other natural fertilizers.

This soil conditioner is especially useful for gardeners who want to ensure their kohlrabi plants receive optimal nutrition while improving the overall health of the soil. It works well in both garden beds and containers, making it a versatile option for indoor and outdoor gardeners alike. Apply it around the base of your plants to enrich the soil and stimulate strong, healthy root growth.

Pros:

• Enhances soil health and structure
• Organic and safe for pets
• Supports root development
• Can be used in both indoor and outdoor gardens
• Improves overall plant vigor

Cons:

• Requires mixing into the soil
• May not provide enough nitrogen for rapid leafy growth
• Slower acting than some synthetic fertilizers

11.Texas Blend Premium Organic Fertilizer — Unique Fertilizer for Kohlrabi in Texas

Texas Blend Premium Organic Fertilizer is a unique, locally-sourced fertilizer designed specifically for the diverse Texas climate. With a nutrient-rich blend of 7-3-5 NPK, this fertilizer is optimized to support the growth of kohlrabi in both the state’s hot, arid regions and its more humid areas. The formula includes a combination of organic ingredients such as Texas compost, chicken manure, and natural fish emulsion, providing a well-rounded nutrient profile for optimal plant development.

What sets Texas Blend apart is its inclusion of local Texas minerals like azomite and gypsum, which improve soil structure and enhance nutrient availability. This product is especially effective in improving the drainage and aeration of heavy clay soils or enriching sandy soils that are common in Texas. Its slow-release mechanism ensures your kohlrabi receives consistent feeding throughout the growing season, reducing the need for frequent reapplications.

Perfect for gardeners who want to support both local businesses and sustainable practices, Texas Blend is the ideal fertilizer for kohlrabi in Texas’ unique growing conditions.

Pros:

• Locally sourced and made for Texas soils
• Balanced NPK for optimal growth
• Includes Texas minerals for improved soil structure
• Organic and eco-friendly
• Slow-release formula reduces frequent applications
• Supports sustainable gardening practices

Cons:

• Can be more expensive due to local sourcing
• May require additional watering during dry spells
• Not as widely available outside of Texas

Conclusion

Selecting the best fertilizer for kohlrabi ensures a thriving and productive crop. Among the top options, Miracle-Gro Water Soluble All Purpose Plant Food stands out for its fast-acting results and versatility, making it the best overall choice.

For organic gardeners, Espoma Organic Vegetable-Tone Fertilizer provides a sustainable and effective solution.

By understanding your kohlrabi’s specific needs and choosing the right fertilizer, you’ll enjoy a bountiful harvest with exceptional flavor and quality.