Grow cubes are a convenient method of germinating seedlings, and they are swiftly growing in popularity, especially among people who use hydroponics systems or who have limited space for gardening. Traditionally, grow cubes are made with Rockwool, which has been a popular growing medium for years. However, Rockwool is not without its dangers; the thin fibers which make up the cubes can irritate the skin and eyes if not correctly handled.
Coir grow cubes offer an alternative to traditional grow cubes. They provide many of the same benefits as Rockwool without the potentially hazardous side effects. But what are coir grow cubes? How are they constructed, and how can they benefit you? Read on to learn more.
What is Coir?
In essence, coir is the fibrous part of a coconut husk. When processed, coir is separated into fibers and ‘waste coir,’ also referred to as coir pith or coir peat. Coir grow cubes are traditionally made of a combination of fibrous coir and coir pith to provide maximum water retention and aeration.
Using Coir Grow Cubes
For gardeners, coir grow cubes are an excellent option for seedling germination, especially when using a hydroponics system. Because coir is highly water-retentive and allows for proper drainage, it’s challenging to overwater or drown your plants when using a grow cube. Most come easily packaged in mesh bags, which are pre-measured to fit the cube’s expansion when hydrated, and many also come pre-cut to make planting as easy as possible.
Coir grow cubes work best for plants that enjoy a slightly alkaline environment, as they have a somewhat basic pH. However, when transplanting seedlings, you can easily amend your soil to meet the needs of any plant you are growing. And because coir grow cubes are highly fibrous, there is a lot of structure for your seedlings’ root systems. When transplanting to a grow bag, you can place the coir grow cube directly on top of the bag for more root space, or carefully moisten the cube and remove your seedlings to transplant directly into your grow bag or garden soil.
Benefits of Coir Grow Cubes
You may be wondering why it is important to consider switching your growth medium from a more traditional amendment, like Rockwool or peat, to coir. One of the primary reasons to do so is that coir is a highly renewable, sustainable, non-toxic resource, unlike both Rockwool and peat. It is also strongly resistant to mold, fungus, and bacteria, providing a highly stable and inert medium in which your plants can flourish.
By choosing to use a coir grow cube, you’re supporting sustainable agricultural practices and helping to protect vulnerable environments. Plus, as demand for this type of medium grows, supply will rise to match it, driving prices down and making it more affordable to go eco-friendly.
Whether you’re building a hydroponics setup, working in a greenhouse, or gardening in a limited space, consider coir grow cubes. They are an excellent gardening medium that is also incredibly environmentally friendly!