Leca is an acronym and it stands for: Lightweight expanded clay aggregate. It sounds very complicated, but it's quite easy to explain. Essentially, Leca is a growing medium, like soil, in which you can grow your plants. Leca is a collection of baked clay balls that expand when you soak them in water.
When you use soil, it's very easy to feed your plants, because the soil contains nutrients. Leca on the other hand doesn't contain any nutrients. So you might be wondering: why would you even consider using this for growing your plants? That's what you'll find out in this post. After reading this post, you'll understand why it's useful, after which you might even want to give it a try yourself. ***Rinse the clay balls with water & repeat the process until the leftover water is clean. The clay balls are covered with dust and it can cause clogging hence it is advisable to clean it outside. ***