Best Hydroponic Medium Pure Greenery

Best Hydroponic Medium Pure Greenery

Best Hydroponic Medium, The benefits of hydroponic plant cultivation are enormous, and many of them are due to the use of a nutrient medium instead of soil.

Soil is associated with a number of risks to farmers, from soil-borne diseases to invading weeds.

Best Hydroponic Medium

Best Hydroponic Medium

Using a nutrient medium instead of soil reduces this risk.

In this article you will learn how to choose a suitable substrate for you.

The nutrient medium is used in hydroponic systems, not in the soil. But the nutrient medium is not a substitute for real soil.

Nutrients are used to support the roots and stems of plants, such as soil, but they lack the nutrients needed for plants to grow.

As a result, the nutrient medium does not allow to grow the plants themselves.

The nutrient medium is usually porous to contain oxygen and nutrient-rich water.

Although the nutrient medium is similar to the soil, the nutrient solution is an actual substitute.

A nutrient solution is water mixed with nutrients to promote healthy growth.

When choosing a carrier, you should keep in mind three abbreviations: WHC, AFP and CEC.

WHC stands for water retention capacity, indicating how well the medium holds water.

Knowing the WHC of your nutrient medium is important because some hydroponic systems will be more compatible with a lower WHC and others will be more compatible with a higher one.

For example, wick systems will benefit from a medium with a high WHC content, such as coconut fiber, because it makes nutrients readily available without too much water.

In contrast, Nutrient film technique (NFT) systems benefit from a low-WHC environment, such as clay gravel, because plant roots are constantly exposed to nutrient solutions. As a result, they use the medium for support rather than saturation.

AFP stands for air-filled porosity and refers to the air flow of the medium.

Low AFP means that the environment cannot provide the plants with oxygen very well, putting them at risk of rotting.

Finally, CEC, or cation exchange capacity, refers to the amount of minerals in the medium.

In hydroponic systems, a low CEC allows you to better control the nutrients your plants receive.

Nutrient media with higher CEC, such as coconut fiber, may require specially formulated nutrient solutions to achieve the right balance.

The four most popular nutrient media for hydroponic systems are rock wool, lightweight expanded clay aggregate, coconut fiber and perlite.

rock wool

Rock wool, also known as rock wool, is a porous material made from spinning fibers of basalt rock.

This nutrient medium is very popular because of its high WHC content and low CEC. It is easily absorbed and flows well, making it an excellent choice for tidal systems.

Unfortunately, rock wool is not biodegradable, so producers who care about the environment may hesitate.

In addition, it must be pre-soaked in water with a pH of 5 to 5.5 for 24 hours. Otherwise, a high pH level will naturally make it suitable for plant habitat.

lightweight expanded clay concrete filler

Lightweight expanded clay aggregate, also known as clay gravel, is a round piece of hot expanded clay.

Clay gravel has a low CEC and high WHC and AFP, which makes it difficult to waterlog and facilitates the supply of oxygen. It is also reusable!

On the other hand, clay gravel is heavy and can drain too quickly for some systems.

As a result, this environment is best suited for deep-sea cultivation (DWC) systems in which plant roots are constantly exposed to water.

coconut fiber

Coconut fiber, or coconut coir, is a biodegradable organic nutrient medium obtained by grinding the inside of coconut fiber.

On the other hand, coconut fiber is an environmentally friendly choice because it serves as a place for coconut products that are usually thrown away. It also captures oxygen pretty well and feels like potting soil.

Coconut fiber is somewhere in the middle when it comes to CEC and AFP, but it has a high WHC. As a result, nutrient solutions specially created to balance its CEC, which are prone to waterlogging, are recommended.

These aspects make it particularly suitable for drip systems where water intake is strictly controlled.


Perlite is a volcanic rock, and it can be added to other nutrient media or used separately.

Such perlite fans are lightweight and have very low CEC and high AFP, so it is easy to control the power supply.

It also absorbs water quite easily, but not so well that there is a high risk of waterlogging. Therefore, this nutrient medium is best suited for wick systems.

However, perlite floats in water. As a result, it is not suitable for supporting plants in systems that flood the nutrient medium, such as tides.

Now that you know how to choose a nutrient medium, it’s time to start planting!

Our eco-friendly container farms use hydroponic systems inside reusable shipping containers to create ideal growing conditions.

FAQ Best Hydroponic Medium

Which substrate is best suited for hydroponics? Many commercial manufacturers consider rock wool an ideal substrate for hydroponic production. Due to its unique structure, rock wool can retain water and maintain a sufficient amount of air (at least 18 percent), contributing to optimal root growth.

What is the cheapest nutrient medium for hydroponics? Granulated sand is the cheapest option on this list and an excellent nutrient medium for plants that don’t need a lot of nutrients. It is also pH neutral, so it will not affect the pH of your hydroponic system. Sand can be found in most garden shops and it is very easy to use. December 9, 2021

Do you need a nutrient medium for hydroponics? Common nutrient media include rock wool, perlite, vermiculite, sponges, oasis cubes, rice husks and coconut coir. Although some hydroponics do not use nutrient media, most of them do. It is important to choose a nutrient medium that supports plant growth and provides proper drainage. 24. June 2022

What makes a hydroponic environment good? When choosing a hydroponic medium, it is necessary to take into account 1) the ability to retain water, 2) porosity, 3) pH, 4) particle size and 5) plant height. This is because hydroponics nutrient media must be compatible with specific plants and hydroponics.

What is used as a soil substitute in hydroponics? Hydroponics does not use soil; instead, it uses a completely inert and sterile environment. Nutrients in their elementary form are added to the water, and the plant is usually watered several times during the day. Plant roots absorb these nutrients directly because they are already in their basic form and dissolved in water. August 25, 2015

What can I use instead of rock wool for hydroponics? 12 alternatives to rock wool for hydroponic cultivation of coconut coir. Coconut husk is used to make coconut coir. Coconut peat. Coconut peat is an environmentally friendly nutrient medium made from coconut fiber. Perlite. Sand. Cubic oasis. Sponge. Clay pebbles. Stone and gravel / sandstone/ vegetable stone. Other products… * 18. October 2021

What are the 6 requirements for hydroponics? The six necessary things are light, air, water, nutrients, heat and space. Hydroponics cultivation can be carried out both indoors and outdoors. In good conditions, plants will need five to six hours of light a day, access to electricity and a level place without excessive drafts.

Which Hydroponics system is best suited for beginners? Which Hydroponics system is best suited for beginners? Deep Sea Culture (DWC) is the simplest type of hydroponic system you can build and maintain at home. In this system, plants grow with their roots immersed directly in nutrient-rich water. May 6, 2020

Do you need Epsom salt for hydroponics? Epsom salt is often recommended for the treatment of magnesium deficiency not only in conventional soil gardening, but also in hydroponics. Epsom salt is magnesium sulfate, consisting of magnesium, sulfur and oxygen. All three of its main elements are necessary for the healthy development of plants. October 8, 2020

What is the best growing medium? When it comes to versatility, coconut coir is one of the best growing media for cannabis. It is a causeless environment that resembles peat moss in appearance; however, unlike peat moss, it is more environmentally friendly and sustainable. Collected peat moss takes centuries to grow back.

What is a good groundless environment? The groundless media can be inorganic (for example, sand, gravel, pebbles, perlite, rock wool, vermiculite), organic (for example, rice husk, peat, sawdust, straw, coconut fiber) or synthetic (for example, foam boats, sponges, moisture-absorbing plastic fibers).