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PetraTools' HD 100 to fertilize indoor plants.

How to Fertilize Indoor Plants: When and How to Do It

On the brighter side of the current COVID-19 pandemic, people are creating new trends to make staying home more productive. One popular COVID-19 trend is indoor gardening. To keep them healthy, you need to learn how to fertilize indoor plants.  


 PetraTools HD100 to fertilize indoor plants.

Because it is trendy today, people want to know how to keep their plants healthy and growing. Watering plants and exposing them to enough sunlight are useful, but not quite enough.

The thing about plants is that they are easy to have but quite tricky to keep alive. That is why it is essential to take care of them the right way.

One crucial factor that you need to give extra attention to is how you fertilize indoor plants. Fertilizing them is vital to keep them thriving. If you are not sure how to do it, we will teach you in this article. So, let us get started!

Why You Should Fertilize Indoor Plants

Fertilizing your indoor plants creates an invisible yet effective protection layer against various pests and drought. Manufacturers formulate fertilizers to help plants grow healthier, which means having greener leaves, more giant leaves, and stronger stalks.

If you have been looking for ways to keep your greens in tiptop shape, fertilizing them is your best bet. It does not have to be hard at all. You need to learn the types of fertilizers you should use and when you should fertilize your indoor plants.

Types of Fertilizers

Organic Fertilizers

These are the most common types of fertilizers and are also the easiest to look for. Organic fertilizers come from natural materials, such as manure, vegetable and fruit remain, and spoilt food. You can consider them the best because they do not add any chemicals to your plants but may take time to show their effects.

Inorganic Fertilizers

Unlike organic fertilizers, inorganic fertilizers came from chemicals proven to help plants grow faster. They dissolve fast, so plants can absorb them quickly to enhance nutrient intake. They are extremely helpful when your indoor plants are nutrient deficient and need a quick nutrient boost.

Potassium Fertilizers

This type of fertilizer will help your plant survive even when deprived of certain nutrients. Because potassium helps with photosynthesis, it is popular with fruit-bearing plants, too.

Nitrogen Fertilizers

Primarily used amid your plant’s life span, nitrogen fertilizers help plants have stronger stems that are usually prone to breakage during this stage. Therefore, it is crucial to be well informed when you should use fertilizer on your indoor plants.

Phosphorus Fertilizers

While some fertilizers are only good for your plant’s midlife period, phosphorus fertilizers are a constant need. They help your plants have more robust roots and stems. They are also particularly great for when your plant is flowering, seeding, and fruiting.

When to Fertilize Your Indoor Plants

In fertilizing your indoor plants, timing is crucial. That is because proper timing provides these benefits:

  • Prevention of damage to the environment
  • Improvement with the efficiency in using the nutrients
  • Reduction in nutrient losses
  • Increase in yields

Spring is a great time to fertilize your indoor plants. It will help if you do it when your plants are actively growing, which usually happens during the said season.

Fertilizing them when they are dormant will disrupt their growth and may even kill them.

You may also choose to fertilize your indoor plants in the summer, but with extra caution. Some fertilizers may add heat to your plants and could backfire instead of helping them.

Tips to Fertilize Your Indoor Plants

Never Fertilize During Winter

As mentioned, fertilizing should only be done during your plant’s active growth phase. No growth happens during the winter due to the extremely low temperature. It will help if you wait until spring before scheduling another round of fertilizing.

Match Your Plant Needs with Your Fertilizer

The purpose of having different fertilizers is to give plants various benefits. Therefore, it is crucial for you to identify your indoor plants’ needs. Do your research to make sure your routine will benefit your plant the most.

Fertilizing Indoor Plants Once a Year Is Fine

Because indoor plants do not have as much exposure to foreign chemicals and pests, they require less fertilizing, if at all. A warm compost during summer or spring is enough to keep them healthy and thriving for the entire year.

Do Not Overfertilize

Fertilizing is just the same as the other things we do with plant keeping. Too much of it will kill your indoor plants. Read instructions, ask experts, and follow them to a tee.

How to Fertilize Your Plants

The key to properly fertilize indoor plants is using the right tools and type of fertilizer. It will ensure you achieve a smooth routine in growing your plants. There are a few ways to fertilize your indoor plants. Here, we will give you two popular ways:

Top-Dress Application

This is an extremely straightforward approach to fertilizing indoor plants. You do it by hand to spread the granular fertilizer. Simply get a fair amount of fertilizer and apply it around each plant's base. Extend the application to the drip line.

Water Application

This type of application involves dissolving the fertilizer in the water. It also has two ways to do it. The first one (base application) is watering the fertilizer solution to the soil, at the base of the plant. The second option (foliar application) is to water the fertilizer solution to the leaves instead of the soil.

Why Use a Sprayer to Fertilize Your Plants?

As mentioned earlier, using the right tools is a crucial factor to fertilize your indoor plants. A sprayer can primarily make the spraying of fertilizers a lot easier and quicker.

When you prefer using the water application for your fertilizer, using a sprayer is helpful. It can keep one or two gallons of liquid to cater to many indoor plants. This is perfect for when you have plenty of indoor plants at home.

Introducing PetraTool’s HD100

With the many sprayers available on the market, it can get confusing which one is right for you. To help you narrow down your search, choose a product that provides you with several purposes. A good example is getting a sprayer that you can use for both indoor and outdoor fertilizing.

One great sprayer you can check out is the HD100. It can cater to both indoor and outdoor fertilizing. It is also adjustable, portable, and lightweight, which is extremely convenient to use. You can adjust its nozzle for finer misting or coarser streaming sprays.

Its size is small, too, so you can easily carry it anywhere in your home. With its adjustable shoulder strap, you can move conveniently with it while spraying. Adding your fertilizer solution is easy because it has a wide mouth that prevents any mess when you are pouring the liquid in it.


Keeping your indoor plants healthily growing is vital if you want to have them long term. One crucial way to include in your planting routine is fertilizing your plants properly. PetraTools' HD100 is a great sprayer that you can use to fertilize your indoor plants effectively.

Having plants in your home creates a healthy indoor environment. Whether you are using top-dress or water application, follow the proper steps to fertilize indoor plants to see them beautifully bloom in your home!

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