Coir Pot Fillers Benefits & Applications


Planting has come a long way from its inception 11,000 years ago. What used to be a process to survive and sustain for our ancestors is now a hobby to help people bust the stress from their everyday life. Planting can be done in stuffy indoor apartments to beautiful garden, and while a garden does have the upper hand, technology has taken us to a point where, regardless of the plants, plants can thrive to their full potential. One product that aids in this is the coir pot filler.

Coir pot fillers are made from coconut husks and are used in pots to help plants grow bigger and better. Through this piece, let’s take  look at what coir pot fillers are and how they are beneficial for plants.

What is Coir?

Coir, also known as coconut coir, is a natural fiber derived from the husks of coconuts. These coarse fibers aren’t just an eco-friendly alternative to traditional potting mixes; they offer a multitude of benefits for your containerized plants.

Benefits of Coir Pot Fillers:

  • Drainage: Unlike traditional potting soil, coir boasts exceptional drainage properties. The coarse fibers allow excess water to easily pass through, preventing a common enemy of container plants – root rot. This is especially crucial for plants that dislike soggy conditions, like succulents and cacti.
  • Lightweight: Compared to soil, coir is significantly lighter, making it a boon for gardeners, especially when handling larger pots or those positioned on balconies or rooftops. Its lightweight nature also reduces the overall weight of the container, minimizing stress on structures and making them easier to move around.
  • Sustainable: Coir is a renewable resource, derived from a by-product of the coconut industry. This makes it a sustainable choice for environmentally conscious gardeners. Additionally, coir decomposes slowly, releasing valuable nutrients back into the soil over time, further contributing to a healthy growing environment.
  • Moisture Retention: While coir allows for excellent drainage, it also boasts impressive moisture retention capabilities. The fibers act like tiny sponges, holding onto water and releasing it slowly to the roots, ensuring plants stay hydrated between watering sessions. This reduces the risk of underwatering, a common challenge for forgetful plant parents.
  • Plant Growth Booster: Coir offers versatility for a wide variety of plants. Its natural pH is slightly acidic, making it ideal for acid-loving plants like ferns and blueberries. However, for plants that prefer a more neutral or alkaline environment, coir can be easily amended with lime to create the perfect growing conditions.
  • Weed Resistant: Coir is a relatively weed-free medium, minimizing the need for harsh herbicides in your container garden. This creates a safer environment for your plants and reduces the workload for gardeners. Plus, the coarse fibers of coir can help suppress weed growth by preventing seeds from germinating easily.

Applications of Coir Pot Fillers:

  • Works Alone: Coir can be used alone as a potting mix, particularly for plants that require excellent drainage and aeration, like orchids, succulents, and cacti. However, for most plants, it’s often used in combination with other potting amendments.
  • The Perfect Blend: Coir can be mixed with other potting amendments like perlite, vermiculite, or even traditional potting soil to create a customized mix that caters to the specific needs of the plant. For example, for moisture-loving plants like ferns, you might add less coir and more moisture-retaining ingredients like peat moss.
  • Top Dressing: Coir can be used as a top dressing for potted plants. This helps retain moisture, regulate soil temperature, and suppress weed growth. The coarse fibers of coir also add an aesthetically pleasing touch to your container garden, providing a natural and textured look.
  • Seed Starting: Coir is a fantastic medium for starting seeds. Its excellent drainage and aeration create ideal conditions for seed germination. Additionally, coir is sterile, minimizing the risk of damping-off disease, a common problem for seedlings in traditional soil.
  • Hydroponics: Coir is a popular choice for hydroponic systems due to its excellent drainage and ability to hold onto water and nutrients. This makes it ideal for growing plants without soil, offering a clean and controlled environment.
  • Terrarium: Terrariums require a well-draining yet moisture-retentive medium. Coir perfectly fits this bill, making it a valuable component for creating beautiful and thriving miniature ecosystems.

Using Coir Pot Fillers Effectively:

Choosing the Right Coir: Coir comes in various forms, including bricks, coir chips, and coir fiber. Bricks are the most common and economical option. Opt for washed or buffered coir to ensure it has a neutral pH suitable for most plants.

Hydration is Key: Before using coir, soak the compressed bricks or chips in water for several minutes until they fully expand. This process can take anywhere from 15 minutes to an hour, depending on the size of the coir pieces.


If you love plans and adore growing them, then coir pot fillers are a must have. Not only are you making sure that your plants get the right nutrition, but you’re also ensuring that they grow big, ripe and bright! If you are on the lookout for the best coir products in UK, go check out Coirmedia at We offer some of the best coir based products in the market and ensure that the products are 100% sustainable and are green for the world!

Vanek Hasith
the authorVanek Hasith