What is 30-10-10 Fertilizer Used For | The Ultimate Guide

This in-depth guide is for you if you want to know “what is 30-10-10 fertilizer used for“.

But first, I have a question for you.

Can you guess what this number shows? It refers to the N-P-K ratio.

To be precise, it shows the percentage of three nutrients:

  • Nitrogen: 30%
  • Phosphorus: 10%
  • Potassium: 10%

Now, let me introduce these nutrients to you.

What Does “30-10-10” Mean?

As we discussed earlier, this number shows the percentage (NPK ratio) of nitrogen, phosphorus and potassium.

But, why are they important? Let’s discuss this first.


The high nitrogen content in the 30-10-10 fertilizer makes it great for your lawn, vegetable plants, flowers, palms and orchids.

Here’s why.

It is a source of energy for metabolic processes in plants.

Photosynthesis, respiration and nitrogen fixation are some examples of metabolic reactions in plants.

Moreover, it is a component of chlorophyll. Note that chlorophyll is a compound by which plants make sugars through photosynthesis.

what is 30-10-10 fertilizer used for

The best part?

This is what your plant uses to grow.

Now the question is, why is nitrogen important for leaf growth?

It is used to make amino acids, proteins, nucleic acid, and DNA (deoxyribonucleic acid). Note that a plant cannot grow properly without amino acids.

Pretty simple, isn’t it?

I have a question for you. How do plants obtain nitrogen?

Remember that plants obtain nitrogen in form of nitrates. So here’s the takeaway.

Summary: Nitrogen nurtures your grass, and makes it thicker, greener, and lusher.

Now, let’s talk about phosphorus.


I have a question for you. How does phosphorus affect plant growth?

You should know that it is a major component of ATP (Adenosine triphosphate).

It is a structure that provides energy to the plants. Here are some functions of phosphorus:

  • Energy transfer
  • Photosynthesis
  • Transformation of sugar and starch
  • Movement of nutrients

Here’s something important.

The major function of phosphorus is that it supports the root and shoot system of plants. Moreover, it leads to fruit and flower development as well.

Now you might be wondering, how does a plant obtain phosphorus?

Phosphorus is taken up in its primary forms. These are called orthophosphates, H2PO4 and HPO42-.

Pretty simple, isn’t it?

Summary: It supports the shoot and root system of plants. Plus, it is important for flower blooming and fruit production.

This takes us straight to our next topic.


It improves the overall health of your plant. Let me explain.

Potassium builds up plant cells.

You should know that Potassium allows the movement of water, carbohydrates, and nutrients. It activates the enzymes which make ATP, starch, and proteins.

The question is, how is it done?

This is done by regulating the closing and opening of stomata (cell structure involved in gaseous exchange).

Now you might be wondering, how does a plant obtain Potassium?

It is taken up in form of Potassium ion (K+). Note that it quickly dissolves in water.

Amazing, isn’t it?

With this, let’s move on to our next topic.

What is 30-10-10 Fertilizer Used For?

Here’s how this fertilizer is good for your plants.

Overview: What is 30-10-10 fertilizer used for? The high nitrogen content prevents nitrogen deficiency in your plant. Remember that nitrogen improves your lawn colour and foliage. Moreover, the high concentration of nutrients increases the productivity of crops.

Let’s take a look at each of them in detail.

  • It prevents Nitrogen deficiency in your plant.

As we discussed earlier, this fertilizer contains 30% nitrogen. This fulfils the nitrogen requirement.

What is 30-10-10 Fertilizer Used For

As the word suggests, nitrogen deficiency is when your plant lacks nitrogen. This can cause the following problems for your plant:

  1. Slow growth
  1. Reduced tiller development
  1. Pale yellowish-green plant

In simple words, less nitrogen causes wilting and poor leaf growth.

Amazing, isn’t it?

Let’s continue our discussion about nitrogen.

  • It improves your lawn colour and foliage.

Note that foliage refers to the leafy part of your plant or tree.

Let me explain.

Have you ever wondered what makes your grass green and vibrant?

There is a pigment in plants known as chlorophyll. This pigment reflects green light to your eyes.

As I mentioned earlier, nitrogen is an essential component of chlorophyll.

The takeaway is that nitrogen gives your grass a vibrant green colour. This makes the 30-10-10 fertilizer great for lawns as it promotes healthy turf.

This takes us straight to our next point.

  • It increases the productivity of crops.

Let me explain.

Without inorganic fertilizers, the soil nutrient level will decline rapidly. This is because the 30-10-10 fertilizer has a high concentration of nutrients.

The idea is that nutrients are rapidly available for plant uptake. This increases the productivity of crops.

Over here, I want to quickly compare organic and inorganic fertilizers.

Inorganic fertilizers are cheaper and easier to transport. Moreover, they are required in small quantities (comparatively).

  • It protects your plant from high temperature and drought.

The 10% potassium in this fertilizer allows it to do so.

It also protects from frost and snow in winters. Here’s why.

As we discussed earlier, potassium is related to the movement of water, nutrients, and carbohydrates. So this ability allows it to do so.

Let me explain.

The rate of transpiration increases to cool down the plant during high temperatures. Note that transpiration refers to the loss of water vapour through the stomata.

Pretty simple, isn’t it?

  • The application process is simple.

Irrespective of the type of fertilizer you use (granular or liquid), the application process is simple.

Let me explain.

Granular fertilizer:

If you want a steady supply of nutrients over time, this type is for you.

The idea is that granular fertilizers are absorbed comparatively slower as the plants break them down first. It comes in dry pelleted form.

As we discussed earlier, this can work great for your plant as the nutrients are gradually released. So, you do not have to re-apply it constantly.

They are cheaper than liquid fertilizers when bought in bulk.

If I talk about its application, you can spread it evenly with your hands. You can also use a drop spreader for lawns.

granular 30-10-10 Fertilizer

Now, let’s talk about liquid fertilizers.

Liquid fertilizer:

As the name suggests, this is a liquid product. It is usually added to water before applying to plants.

Let me explain.

The idea is that it provides nutrients instantly. Plus, it contains more nutrients than granular fertilizer.

The application process is as simple as watering your lawn. Note that this fertilizer has less salt content.

This is the reason they are preferred as “starter fertilizers“. Over here, note that overapplication can “burn” your plant.

Now back to our topic.

  • The 30% nitrogen makes it an excellent choice for evergreens.

We have already discussed the importance of nitrogen for plants.

They keep their leaves or needles all year.

The idea is that evergreens require a “complete fertilizer” – one that supplies the macronutrients nitrogen (N), phosphorus (P), and potassium (K).

Further reading:

[Best Guide]: What is 12-4-8 Fertilizer Good For?

5 Amazing Uses of Ammonium Sulfate (21-0-0) Fertilizer

This takes us straight to our next topic.

How and When to Apply 30-10-10 Fertilizer?


Here’s a thing. You have to be extremely careful during the application process.

This is because over-application can damage your plant.

So here’s the step-by-step guide.

  • Conduct a soil test.

Before applying any fertilizer, this is something that you should consider.

As the name suggests, soil testing tells the “expected growth potential“. Here’s what I mean.

This test will help you identify the level of nitrogen, phosphorus and potassium in your soil. In this way, you can determine the amount of fertilizer to use.

Pretty simple, isn’t it?

  • For a granular fertilizer, spread it evenly with your hand.

But, this is not recommended.

Instead, you should use a fertilizer spreader. When applying, spread it in a circular manner (away from any exposed roots).

Note: A liquid fertilizer is a good “starter fertilizer“. It is first dissolved in the water. Then, it is sprayed on the leaves using sprayers to provide quick nutrients to the plants.

How to apply 30-10-10 fertilizer

Then, move on to the third step.

  • Apply the 30-10-10 fertilizer maintaining a ratio of 2-3 pounds per 1000 sq. ft.

Let me explain.

Remember that this rate may not be ideal for you. This is because the rate depends on the type of fertilizer you use.

Plus, your soil condition matters a lot. So, here’s the takeaway.

For the best application rates, follow the instructions on the package carefully.

Then, water it thoroughly for 15 minutes after the application. This will ensure that the nutrients reach the root system of the plant.

Now the question is “when to apply this fertilizer?”


Recall the NPK ratio.

This shows the high percentage of nitrogen (30%). Here’s what I mean.

  • The idea is that the fertilizer application will depend on the nutrient requirement.

Here is an example. Let’s say that you are witnessing nitrogen deficiency symptoms in your plant.

At this stage, you can use a nitrogen fertilizer (such as ammonium nitrate) to fulfil the nitrogen requirement.

In short, if you witness signs of deficiency, you should consider the 30-10-10 fertilizer.

  • Fertilizer applications in the fall are crucial.

Let me make this simple for you.

Fall applications have a greater risk of loss of nitrogen. So here’s what you should do.

For warm season grasses: For grasses like Bermuda and St. Augustine, use nitrogen fertilizers throughout summer.

For cool season grasses: For grasses like Kentucky Bluegrass, Fescue and Ryegrass, can use nitrogen fertilizers in spring and fall.

The idea is that the 30% nitrogen in this fertilizer is great for plants during the late vegetative and early reproductive stages.

In short, the 30-10-10 fertilizer can be a great fit for plants in their blooming or fruiting stage.

Amazing, isn’t it?

  • Apply the fertilizer in the early evening or late afternoon.

But, why is this important?

Remember that the sun’s rays can burn your grass due to the heat of a scorching afternoon.

As a general rule, it is good to water your lawn before and after fertilizer applications.

Still, I highly recommend you read the instructions provided by the manufacturer. This is important.

This takes us straight to our next topic.

Can I Use 30-10-10 Fertilizer For Orchids?

Well, this is an interesting question.

Yes! You can use this fertilizer for orchids. Let me explain.

Orchids are flowering plants with complex flowers which are showy or bizarrely shaped.

They should be fertilized regularly with a balanced fertilizer, such as the 18-18-18 fertilizer.

During spring and summer (growing stages), orchids require a balanced fertilizer. As we move ahead, “half-strength fertilizers” are recommended.

At this stage, the 30-10-10 fertilizer can be a good fit.

What is 30-10-10 Fertilizer Used For

Now, here’s something interesting.

When your orchids are blooming, fertilizer applications are optional.

Summary: Yes! You can use it for orchids. This is because orchids need a “complete fertilizer” as they require nitrogen (N), phosphorus (P) and potassium (K).

Can I Use 30-10-10 Fertilizer For Tomatoes?

Here’s the truth.

Growing tomatoes can be tricky. But, do not worry. Here’s everything you should know.

Usually, tomatoes need high phosphorus fertilizers such as 6-24-24 and 8-32-16. You should be extremely careful when applying these.

As I mentioned earlier, over-application can destroy your plant. We also discussed how phosphorus is involved in root growth.

Over time, you can use fertilizers, such as the 30-10-10 fertilizer, to fulfil the nutrient requirements.

Note that the 30% nitrogen makes it an excellent choice during the fruiting stages.

In short, you can use it to grow tomatoes.

Can I Use 30-10-10 Fertilizer For Plumeria?

To be precise, there are better options.

Let me explain.

For plumeria, 10-50-10 (for liquid options) and 10-30-10 (for slow-release options) are the most popular NPK ratios.

This is because they have a high phosphorus requirement.

Over here, note that they have a moderate requirement for nitrogen and potassium.

In the early stages, the plant needs less nitrogen.

For the application rate, read the instructions on the package. In general, use one pound of fertilizer for an inch of trunk diameter.

You have to be careful during this process as overapplication can destroy plumeria.

This takes us straight to our next topic.

The Disadvantages:

Here’s the truth.

Chemical fertilizers have some disadvantages as well. Some of them are:

  • They contain harmful chemicals.

The chemicals in this fertilizer can be harmful to our health. Therefore, protective clothing is recommended before applying the fertilizer.

In the same way, these chemicals “seep” into the plants.

Note that inorganic fertilizers may contain a lot of salt. This can build up in your soil.

  • They may crust on top of the soil.

Soil crusting refers to a thin and dense layer of tough material. Remember that chemical fertilizers only provide a “quick fix“.

As the name suggests, they are not good for the soil in the longer run.

In the same way, overfertilization can damage your plants. Let me explain this with the help of an example.

Note that excess nitrogen can make your plant vulnerable to diseases.

Pretty simple, right? Now, let’s jump on to the conclusion.

Wrapping Up:

So, there you have it.

Your question, “what is 30-10-10 fertilizer used for“, is answered. In short, this fertilizer is good for vegetable plants, orchids, flowers and lawns.

The NPK ratio is ideal for some plants.

But, you should be careful when applying this fertilizer. This is because over-fertilizing your plant can cause chemical burns.

If you have any questions, feel free to get in touch. Stay tuned for more.


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