Squash is an easy to grow plant and can grow in many climates, but to get the best results, you need to use the right fertilizer for your squash plants.
Fertilizer can provide essential nutrients and minerals that your squash needs to thrive. But not all fertilizers are created equal. Some are better suited for squash than others.
This article will review the best fertilizer for squash plants on the market. We will also give you some tips on how to choose and use fertilizer for your squash garden.
7 Best Fertilizers For Squash Are:
The Best Fertilizer For Squash
- NPK Ratio: 7-6-9
- Type: Organic Slow-Release Granules
- Quantity: 2.5 lb (1.1 kg)
Miracle-Gro Performance Organic Plant Nutrition Granules – the perfect companion for growing scrumptious squash and other fruits, vegetables, and herbs in your very own garden.
It is made with a blend of natural and organic ingredients. These granules are OMRI (Organic Materials Review Institute) listed and specially formulated to give your squash and other edible plants the vital nutrients they need to thrive.
The best thing, you can expect to see visible results in just 7 days! Whether planting in-ground or in containers, simply apply the granules dry and water regularly. Then, reapply every 4-6 weeks to nourish your plants.
With Miracle-Gro Performance Organics Edibles Plant Nutrition Granules, you’ll not only get a mouth-watering squash but also take pride in knowing that you’re using organic and natural ingredients in your garden.
- NPK Ratio: 4-4-4
- Type: Organic Slow-Release Granules
- Quantity: 5 lb (2.3 kg)
Down to Earth Organic Vegetable Garden Fertilizer is a five-pound box of all-natural goodness packed with a 4-4-4 formula designed to nourish your squash plants and help them reach their full potential.
Down to Earth Vegetable Garden Fertilizer is perfect for all your gardening needs – from giving your spring greens a vibrant start to empowering your summer tomatoes and even nurturing your favorite fragrant herbs. It’s a versatile mix perfect for backyard gardens and hobby farms.
This carefully blended mix is made from the finest sources of organic nutrients without using synthetics or low-quality fillers like poultry waste.
Down to Earth’s Vegetable Garden Fertilizer is easy to use, no matter your gardening style. Give your squash plants the nourishment they deserve and watch them thrive with Down to Earth Organic Vegetable Garden Fertilizer!
- NPK Ratio: 10-10-10
- Type: Fast Acting Non-Organic Liquid
- Quantity: 32 Oz (0.9 l)
Triple 10 All Purpose Liquid Fertilizer is a high-quality non-organic fertilizer designed for all stages of plant growth. With its balanced 10-10-10 formula, combined with amino and seaweed extract, this fertilizer is perfect for fruits, vegetables, flowers, and turf grasses.
While this product is not organic, it can be an effective solution for quickly fixing existing nutrient deficiencies in squash plants. However, it should not be used for constant use.
One of the standout features of this product is the easy measure and pour bottle. This allows the end-user to measure and pour a specific dosage by simply squeezing the bottle. This makes it incredibly easy to use and ensures that the right amount of fertilizer is applied every time.
Triple 10 All Purpose Liquid Fertilizer is an excellent choice for anyone looking to fix existing nutrient deficiencies in their squash plants and save their harvest. Its balanced formula, combined with its ease of use, makes it a top non-organic pick for gardeners.
- NPK Ratio: 2-5-3
- Type: Organic Slow-Release Granules
- Quantity: 4 lb (1.8 kg)
Jobe’s Organic Fertilizer is great for growing delicious and healthy squash. This organic granular fertilizer is not only OMRI (Organic Materials Review Institute) listed and certified by the USDA but also contains Jobe Biozome. This aggressive microorganism breaks down material rapidly for faster results.
Jobe’s Organic Fertilizer is all-natural and will help your squash resist disease, insects, drought, and other unfavorable conditions throughout the growing season. Plus, the easy-pour bag makes application a breeze.
Whether starting a new garden or nurturing established plants, Jobe’s Organic Fertilizer will help you achieve bountiful squash and other vegetable harvests. Just mix it with the soil before planting, or mix it with water for seedlings and established plants and watch your squash flourish.
Give your squash the nutrients they crave and enjoy the satisfaction of a thriving garden with Jobe’s Organic Fertilizer.
- NPK Ratio: 24-6-16
- Type: Non-Organic Fater Soluble Fine Granules
- Quantity: 3 to 10 lb (1.4 to 4.5 kg)
Miracle-Gro Water Soluble All Purpose Fertilizer is a trusted and reliable non-organic fertilizer that can be used to grow bigger and more beautiful plants. This fertilizer is perfect for squash plants and a wide variety of other plants, including flowers, herbs, trees, shrubs, and houseplants.
This fertilizer contains essential nutrients that are quickly absorbed by the plants, promoting their growth and yield. While non-organic fertilizers can be great for quickly fixing existing problems in your plants, it is vital to use them sparingly. They should not be used for the entire growing season.
Miracle-Gro Water Soluble All Purpose Fertilizer will increase the size and quality of squash plants. Also, the health and resistance to pests and diseases will improve. Additionally, the color and fragrance of flowers will be more vibrant.
If you are looking for a reliable and convenient fertilizer to quickly fix existing problems in your squash plants or any other plants in your garden, Miracle-Gro Water Soluble All Purpose Fertilizer is an excellent choice.
- NPK Ratio: 4-6-4
- Type: Organic Fine Granules
- Quantity: 3 lb (1.4 kg)
Burpee Bone Meal Fertilizer is a natural and organic fertilizer perfect for growing healthy and robust squash plants. This fertilizer is a rich source of organic nitrogen, phosphorus, and calcium, all of which are vital for plant growth and development. It promotes strong root systems, vibrant blooms, and delicious vegetables.
One of the standout features of this fertilizer is its ease of use. Simply add it to the soil or potting mix at any time before harvest. It breaks down slowly, releasing nutrients for robust growth throughout the season. It is also OMRI (Organic Materials Review Institute) listed for organic gardening, so you can use it confidently on your edible crops.
Burpee Bone Meal Fertilizer is ideal for new bedding plants, established flower gardens, patio containers, and more.
Squash fruits will increase in size and quality, plant health will improve, and resistance to pests and diseases will be enhanced.
If you are looking for a natural and organic fertilizer for your squash plants or any other plants in your garden, Burpee Bone Meal Fertilizer is an excellent choice. With its proven track record of success, you can trust that you will see amazing results with this product.
- NPK Ratio: 4-6-3
- Type: Organic Fine Granules
- Quantity: 4 lb (1.8 kg)
Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer is a great natural and organic fertilizer that can help you grow an abundance of nutritious and tasty squashes. This premium blend of organic nutrients, probiotics, mycorrhizae, and humic acids promotes healthy root systems, vibrant blooms, and delicious fruits and vegetables.
It is easy to use – simply add it to the soil or potting mix at any time before harvest. It feeds your plants for several months and is OMRI (Organic Materials Review Institute) listed for organic gardening.
This organic fertilizer will increase the size and quality of your squash and other fruits, vegetables, and herbs. Plant health will improve, and resistance to pests and diseases will be enhanced. Additionally, the flavor and aroma of squash will be more vibrant.
If you want to grow an abundance of nutritious and tasty squashes in your garden, Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer is an excellent choice.
Our Top Picks For Best Fertilizer For Squash
Why Do You Need A Fertilizer For Squash?
Squash is a popular and versatile fruit (some would say vegetable) that can be enjoyed in many dishes. However, growing squash can be challenging, especially if you want to get a high yield and quality.
Here is a list of reasons why you need fertilizer for squash:
Provide Essential Nutrients
Squash plants need a balanced supply of nitrogen (N), phosphorus (P), potassium (K), and other nutrients to grow well. Fertilizers can provide these nutrients in a form readily available for plants to absorb and use.
Boost Growth And Development
Squash plants have a long growing season and need a lot of energy to produce large fruits. Fertilizers can help them grow faster and more robust, develop healthy roots, stems, leaves, and flowers, and set more fruits.
Improve Yield And Quality
Well-fertilized squash plants can produce more fruits per plant and per area. Fertilizers can also improve the size, shape, color, flavor, and nutritional value of these fruits.
Prevent Nutrient Deficiencies
Squash plants that are not fertilized may suffer nutrient deficiencies if the soil is poor. This can cause symptoms such as yellowing, wilting, stunting, curling, or spotting of the leaves. Poor flowering and fruiting or reduced resistance to pests and diseases may also occur. Fertilizers can prevent or correct these problems by supplying the missing nutrients.
Enhance Soil Health
Fertilizers can improve the physical, chemical, and biological properties of the soil. For example, organic fertilizer can increase the organic matter, water-holding capacity, aeration, and soil microbial activity. Synthetic fertilizer can adjust the pH, salinity, and nutrient balance of the soil.
What to Look for When Buying Fertilizer For Squash (Buyer’s Guide)
- NPK Ratio
- Fertilizer Type
- Soil Type
- Time of Year
NPK ratio indicates the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. These are the primary macronutrients plants need for growth, flowering, and fruiting. Different crops have different NPK requirements, so choosing a fertilizer that matches your crop’s needs is essential.
Squash plants need a balanced supply of N, P, and K throughout their growth cycle. Nitrogen promotes leaf and vine growth, phosphorus supports root and flower development, and potassium enhances fruit size and quality. A balanced fertilizer can provide these nutrients in a readily available form for the plants to absorb and use.
Fertilizers can be liquid or granular, organic or synthetic, slow-release or fast-acting. Each type has its advantages and disadvantages for squash plants.
- Liquid fertilizers are easy to apply and quickly absorbed by squash plants, but they must be applied more frequently. They are suitable for complete growing season application to give the squash plants a quick boost of nutrients.
- Granular fertilizers are more convenient and last longer, but they must be watered in or worked into the soil. Slow-release granular fertilizers provide a steady supply of nutrients throughout the squash season.
- Organic fertilizers are derived from natural sources such as compost, manure, or bone meal and improve soil health. Still, they may have lower nutrient content and availability for squash plants. They are suitable for improving soil organic matter, water-holding capacity, and microbial activity.
- Synthetic fertilizers are manufactured from chemicals that provide high nutrient content and availability for squash plants, but they may harm soil health and the environment if overused. They are suitable for providing high amounts of nutrients to squash plants. Still, they may cause nutrient imbalances, salt accumulation, or pollution if used excessively or improperly.  
One of the factors to consider when buying fertilizer for squash is the quantity in the package. You don’t want to buy too little for your squash plants. The amount of fertilizer you need depends on the size of your garden, your soil fertility, and how many squash plants you have.
Generally, squash plants need a soil amendment before planting and every two weeks or monthly fertilizer application (depending on the type of fertilizer) during the growing season.
The label instructions on the fertilizer package will tell you how much to use per plant or per square foot of the garden area. You can then use these guidelines to estimate how much fertilizer you need to buy for your squash garden.
No worries if you buy more fertilizer than you need for one season. You can store it in a cool and dry place and use it for the next year as long as it is within its expiry date.
Another factor to consider when buying fertilizer for squash is the soil type in your garden. Squash plants grow best in well-drained and fertile soil rich in organic matter.
If your soil is poor or low in organic matter, you may need to add more fertilizer to boost your squash growth and yield. However, suppose your soil is already fertile and has plenty of organic matter. In that case, you will not need to apply much fertilizer.
Avoid overfertilizing your squash plants. Overfertilizing can cause problems such as excessive leaf growth, reduced fruiting and flowering, nutrient imbalances, and an increase in sap-sucking pests such as aphids.
The best way to know how much fertilizer you need for your squash plants is to test your soil and follow the recommendations based on your soil type and nutrient status. While you can buy home test kits, most will not provide the necessary information. A more accurate way to test your soil is to use a certified soil testing lab to perform a more thorough test.
Check our article on “State-By-State List Of Soil Testing Labs“
Time of Year
Another factor to consider when buying fertilizer for squash is the time of year you plan to plant and harvest your squash. Squash plants are divided into two categories: summer squash and winter squash.
Summer squash is harvested throughout the summer months and has soft skin that can be eaten. Winter squash is harvested in late fall or early winter and has hard skin that needs to be peeled or cooked.
Depending on the type of squash you grow, you may need to fertilize at different times of the year.
Another factor to consider when buying fertilizer for squash is the safety of your family and pets. Fertilizers can contain harmful chemicals or toxins that can cause irritation or illness when ingested or exposed to the skin or eyes.
Organic fertilizers are generally safer than synthetic fertilizers, as they are derived from plant or animal sources and do not contain synthetic chemicals.
However, organic fertilizers are not completely risk-free, as they can still contain pathogens, heavy metals, or allergens that pose health hazards. Therefore, always follow the label instructions and wear gloves when handling fertilizer. You should also store fertilizers securely away from children and pets. 
Organic fertilizers can be especially attractive to dogs, as they may smell like food or bones. If your dog eats organic fertilizer, it can cause drooling, tremors, vomiting, diarrhea, dehydration, or even poisoning. 
Tips On Using Fertilizer For Squash
Fertilizing your squash plants can help them grow healthy and produce abundant fruits. However, you need to follow some tips to use fertilizer effectively and safely. Here are some of them:
- Choose the correct type of fertilizer for your squash plants. A balanced fertilizer is a good option for most soil types.
- Wear gloves when handling fertilizer, as they can cause irritation or allergies.
- Use the fertilizer according to the label instructions. Apply granular slow-release fertilizer directly to the soil. Liquid and soluble fertilizers, on the other hand, need to be mixed with water and applied to the side of the plant, not directly on the stem or roots.
- Fertilize your squash plants regularly according to the label instructions. If the instructions are unavailable, you can follow the general guidelines for liquid or slow-release fertilizers. Typically, liquid and soluble fertilizers are used every 2 weeks and slow-release fertilizers are used every 6 to 8 weeks.
- Avoid overfertilizing your squash plants, as it can cause problems such as excessive leaf growth, reduced fruiting and flowering, and nutrient imbalances. Overfertilization can also attract pests to your plants.
- Store fertilizers in a secure place away from children and pets. You should also keep fertilizers in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and moisture. Make sure the containers are tightly sealed and labeled clearly.
Homemade Liquid Fertiliser
Feeding your plants with liquid fertilizer is one of the most effective ways to provide them with the necessary nutrients. You can easily make a homemade fertilizer for squash plants.
Here’s a simple recipe for a liquid fertilizer high in potassium and low in nitrogen – perfect for fruiting squash and other summer-fruiting vegetables.
- Gather comfrey, stinging nettles, and cleavers. You can also include animal manure, seaweed, and weeds like puha, thistles, and plantains.
- Fill a 20-liter container with the green material, pushing it down as hard as possible.
- Add water to the container and put a lid half-on.
- Leave the container for a month to ferment.
- After a month, stir the mixture.
- Dilute the liquid to the color of weak tea.
- Apply the diluted liquid to the leaves and roots of your plants.
Best Fertilizer For Squash Frequently Asked Questions (FAQ’s)
Should I Use Organic Or Non-Organic Fertilizer?
When choosing between organic and non-organic fertilizers for your squash plants, it is always better to use organic fertilizers.
Non-organic fertilizers may provide more nutrients. They do not improve the overall health of the soil. While organic fertilizers will provide essential minerals and help improve soil structure and water retention, which can help ensure optimal growth for your squash plants.
What Are The Different Types Of Best Squash Fertilizers?
There are two main types of fertilizers for squash: granular and liquid. Granular fertilizers are slow-release and provide nutrients over time, while liquid fertilizers immediately boost nutrients.
Is Liquid Fertilizer Better Than Granules?
Suppose you need to address nutrient deficiencies quickly or immediately boost nutrients to your plants. In that case, liquid fertilizer is a better choice. However, if you need to provide a steady supply of nutrients over time, you should choose granular fertilizer.
Liquid fertilizers are fast-acting and provide an immediate boost of nutrients to plants. They are typically applied by mixing with water and spraying onto the leaves or soil around the plants. Liquid fertilizers are easy to apply and can be used to address nutrient deficiencies quickly.
Granular fertilizers, on the other hand, are slow-release and provide a steady supply of nutrients over time. They are typically applied by sprinkling onto the soil around the plants and then watering in. Granular fertilizers can be more cost-effective than liquid fertilizers and are an excellent choice for long-term plant nutrition.
Why Fertilize Your Squash?
Fertilizing your squash plants is important because it gives them the essential nutrients they need to grow and produce fruit. Squash plants have high nutrient requirements and can quickly deplete the soil of its natural resources. By fertilizing your plants, you can replenish the soil and ensure that your plants have access to the nutrients they need to thrive.
What Do You Feed Squash Plants?
Squash plants do best when fed with a balanced fertilizer. Nitrogen promotes healthy foliage growth, phosphorus supports flowering and fruit development, and potassium helps with overall plant health and disease resistance.
How Often Do I Need To Fertilize?
The frequency of fertilization for squash plants can vary. Always follow the instructions on your fertilizer package. If the packaging is unavailable, use the general rule of applying liquid fertilizers every 2 weeks and granular fertilizers every 6 to 8 weeks. Monitor your plants’ growth to determine the best fertilization schedule for your garden.
When Should I Fertilize My Squash Plants?
If you use liquid fertilizer, fertilize your plants in the morning to avoid water evaporation and ensure that the plants absorb the nutrients more effectively.
If you use granular fertilizer, the time of day is less important as the nutrients are released slowly over time. However, it is still a good idea to water the fertilizer in after application to ensure the nutrients are available to the plants.
Are Coffee Grounds Good For Squash?
Yes, coffee grounds can be a great addition to your squash garden. They are a rich nitrogen source, essential for healthy foliage growth. Additionally, coffee grounds add organic matter to the soil, improving soil structure and water retention. However, a significant amount of coffee grounds is needed to have a noticeable impact on soil structure.
Simply sprinkle used coffee grounds around the base of your squash plants and work them into the soil.
Is Epsom Salt Good For Squash Plants?
Yes, Epsom salt can be beneficial for squash plants. It provides magnesium, which is essential for photosynthesis and overall plant health. Magnesium deficiency can result in yellowing leaves and reduced fruit production. To use Epsom salt in your squash garden, dissolve 1-2 tablespoons of Epsom salt in a gallon of water and use it to water your plants. 
Is Bone Meal Good For Squash Plants?
A bone meal can be a great addition to your squash garden. It provides phosphorus, which is essential for flowering and fruit development. Phosphorus deficiency can result in poor fruit production and stunted growth. To use bone meal in your squash garden, simply sprinkle it around the base of your plants and work it into the soil.
Choosing the best fertilizer for squash is important for growing healthy and productive plants. With so many options available, it can be overwhelming to decide which one is right for your garden. Whether you choose a natural and organic option or a synthetic fertilizer, using the right product can help you grow bigger and better squash.
We hope this guide has helped you find the best fertilizer for your squash plants. If you enjoyed reading our article, check out other similar articles in our “Soil and Fertilizers” section.
Want to share your thoughts, or have you read something you disagree with? Send us an email! We would love to discuss it 🙂