Cloning a marijuana plant is an easy method of propagating a new plant, from an existing mother plant.
When you “clone” a marijuana plant, you are basically just taking a clipping and placing it in the proper conditions for it to form roots. After rooting, which usually takes 1.5-3 weeks, the rooted “clone” is ready to begin vegetative growth and is now a plant itself. At the very beginning of the vegetative stage for a cloned marijuana plant, it is essentially the same as a young seedling, with a few exceptions.
A seedling, or plant grown from seed, has a taproot that is basically a central root that grows in a downward position and is very strong and helps to hold the young seedling in place by holding onto the soil or other growing medium.
A clone does not have a taproot but instead has many, many smaller roots that grow from the sides of the stem in an outward direction. This can sometimes lead to a clone being “loose” in the growing medium.
Adding rocks or hydroponic rocks to your growing medium will give your young clones roots something extra to hold onto, making your young marijuana clone stronger and less likely to be uprooted.