The Best Fertilizer For Squash and Cucumbers

Last Updated on October 26, 2022

The best fertilizer for squash and cucumbers is the one that provides these crops with the right nutrients throughout their growing season.

Squash is a tasty and traditional addition to any garden bringing in a festive feel. Besides, they are more versatile in the kitchen – they can be turned into soups, grilled, or baked.

They grow on gardens, containers either flat on the ground or supported on a trellis, and other strong supports. They are super cool both when cultivating and cooking.

Squash is loved and popular among many people, but it can turn out bitter if grown under the wrong conditions.  Excessive drought, watering, or insufficient nutrients can cause the squash to turn bitter.

To provide your squash with the right nutrients, you will need to fertilize your plants. Fertilizing your squash with the proper nutrients ensures the growth of a healthy and tasty crop.

A high-quality fertilizer guarantees you bigger harvests and stronger roots. The nutrients in the fertilizers directly relate to the taste of your squash.  So let’s learn about the best fertilizers to use for squash and cucumbers.

What Type Of Fertilizer For Squash And Cucumbers?

Fertilizers for squash and cucumbers come in various types – liquid, granular, etc.  Let’s look at these types and learn their differences.

Granular Fertilizer

Granular is a dry fertilizer applied using a spreader.  It has many benefits, but one that outweighs the rest is that you get to see the actual fertilizer as you apply it. You can easily tell where you have applied and where you have not.

Granular fertilizer is a slow-release fertilizer that feeds your squash and cucumber plants for a longer period.  You may only use this fertilizer once or twice a year.

Unlike the slow-release fertilizers, the quick-release ones release nitrogen into the soil almost immediately after application.  The quick-release fertilizer is best used when you want to fix your soil immediately.

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Liquid Fertilizer

This fertilizer is in its concentrated form and needs to be diluted before application. It is easy to apply and is quickly absorbed into the soil. You can apply these fertilizers using a watering can, hose, or canister.

A huge disadvantage of this type of fertilizer is that it gets washed away when applied during the rainy season.  Be sure to use it when there is no expected rain.


This type of fertilizer comes in the shape of sticks.  It is a slow-release fertilizer; once applied, it will be released over time.  You apply it directly to the ground, and it is easy to use.  This fertilizer is best for gardening beginners, as they can easily use it.

Jobe’s 5001T Houseplant Indoor Fertilizer Food Spikes, 50 Pack(2)

Squash Fertilizer Requirements

Now that you have the types in mind let’s see what all these fertilizer types best for squash and cucumber contain.  But before we even do so, it is essential first to understand the nutrient requirements for squash.

Here is a list of nutrients that your squash plants require for strong growth:

  • Nitrogen.  This is the most critical and lacking nutrient in most garden soil. It is the one nutrient that helps plants grow the fastest.
  • Potassium.  This nutrient assists the plants by building a more disease and drought-resistant factor.
  • Phosphorous.  It helps stimulate root growth.
  • Magnesium.  This nutrient helps plants process sunlight better.
  • Hydrogen.  It is mostly found in water and is needed for the strong growth of your plants.
  • Sulfur. This nutrient provides protein to the plants making it the building block of life.
  • Other nutrients required for plant growth are iron, zinc, boron, copper, chlorine, and manganese.

Having an understanding of the nutrients required and how they help the plant, it’s now time to buy the right fertilize for squash and cucumbers.

The best fertilizer consists of Nitrogen, Phosphorous, and Potassium. Usually, a fertilizer will have 3 digits, such as 1-1-1.  The first digit represents Nitrogen, the second Phosphorous, and the third Potassium.

Here is a list of fertilizer mixes that can help you, depending on your soil needs.

  • 1-1-1 It is an all-purpose fertilizer
  • 1-2-1 This fertilizer promotes root formation and strengthening.
  • 1-2-2 It promotes flowering and fruit growth.
  • 3-1-1 It promotes leaf growth
Squash Fertilizer Requirements

What Is The Best Fertilizer For Squash And Cucumbers?

It is not easy to choose the best fertilizer just by looking at it.  However, there are a few qualities you should check out that include:

Fertilizer Composition

Generally, a deeper understanding of fertilizer composition is critical for productive gardening, especially fruits and vegetables.  The nutrients in the fertilizer you chose directly relate to the taste of your squash.

A good fertilizer has 3 main ingredients – nitrogen, phosphorus, and potassium. Any fertilizer you buy must have 3 numbers representing these 3 ingredients.

A good fertilizer for your squash needs to have a higher phosphorus content—for example, 4-6-4, with phosphorous being more than the other 2 ingredients. Phosphorus helps promote fruiting precisely what you want when growing squash.

Organic Versus Inorganic

Organic fertilizer is always better than inorganic, regardless of the plant you are growing. You can buy organic fertilizers from the nearest organic center.

Organic fertilizers are all-natural and non-toxic to animals, but that doesn’t mean you allow your dogs or cats to ingest them. These fertilizers do not burn your crops or form a crust on your soil like the inorganic ones.

Inorganic fertilizers are synthetic and contain a high percentage of chemicals.  When used correctly, they work well, nourishing your plants properly, but they harm the environment when misused.

What Is The Best Homemade Fertilizer For Cucumbers

What Is The Best Homemade Fertilizer For Cucumbers?

Most gardeners recommend homemade fertilizer for cucumbers and other vegetables as it does not burn the plant’s roots. Among the many homemade fertilizers, we share this recipe with you. You can make yours from lime, bone meal, seed meal, and kelp meal.  You can source all of these ingredients from the nearest garden centers.

Recipe For A Homemade Fertilizer


  • 4 parts seed meal
  • ¼ part agricultural lime
  • 1 part bone meal, bat guano, rock phosphate
  • ¼ part gypsum
  • ½ or 1 part kelp meal
  • ¼ part dolomitic lime

Mix all the above contents in a large container or bucket and fertilize your cucumbers.  Save any remaining mixture in a tightly closed container throughout the growing season.


Is Epsom salt good for cucumber and squash plants?

Yes, it's fine to use Epsom salt when you want to give either of these two types of plants a real boost.

When you apply it, make sure you don't get any on the leaves, otherwise they'll have a hard time absorbing nutrients from it. The reason why we use Epsom salt is that it's a good soil conditioner. It helps the soil hold moisture longer and also holds in more nutrients (nitrogen).

Epsom salt is a natural mineral-rich salt. It can be used to help keep cucumbers and other vegetables fresh. To keep cucumbers fresh, sprinkle them with salt and place them in a plastic bag or container with holes punched in the top. The salt will draw moisture from the cucumbers' leaves, and prevent them from wilting.

What is a good fertilizer for squash?

Squash are sensitive to nitrogen, phosphorus and potassium fertilizers. To start with, most squash require a nitrogen-rich fertilizer such as urea or ammonium nitrate. If you don’t have any of these in your garden, then consider buying them from a local garden center. Most squash also need phosphorus and potassium (P/K), but only in small amounts. You can easily buy these at the same garden center that sells nitrogen.

What is the best fertilizer for growing cucumbers?

Cucumber plants are very sensitive and will benefit from a good fertilizer. The best fertilizer for growing cucumbers is compost. You can make your own with the following: 2 parts peat moss 1 part bark 1 part composted manure Mix and store in a plastic bag. You can also buy composted manure at your local farm supply store.

There are two ways to fertilize your cucumber plants.

Feed the plants regularly with a fertilizer that contains Nitrogen, Phosphorous and Potassium. This will help in the growth of the plant. It is recommended to use an organic fertilizer which will not harm the environment.

Fertilize the soil before planting the seeds. A good way to do this is by adding compost.

What should a homemade cucumber fertilizer include?

A homemade cucumber fertilizer is a blend of compost, manure, and other organic materials. These materials are combined to create an excellent nutrient-rich soil amendment that will improve the growth of your cucumbers. You can make this cucumber fertilizer using a variety of different ingredients. This type of fertilizer is a great option if you don’t have access to a local organic farmer. The best type of fertilizer for growing cucumbers is made from cow manure and compost.

What should a homemade squash fertilizer include?

It depends on your goal. If you are looking for a fast growing, high yielding plant, then you will want to use a very high nitrogen fertilizer.

If you are looking for a plant that will produce for many years, then use a more balanced fertilizer. The most common method for preparing compost for use as a fertilizer is to mix it with wood ash or sawdust.

Final Thoughts

The best fertilizer for squash and cucumbers will give you great rewards for your gardening.  You will have a great harvest that you are truly proud of because you have provided proper growing conditions for your squash.