Another method of propagation is cloning, or asexual propagation. Plants started in this way will mature much earlier than ones started from seed, saving valuable time and producing shorter, bushier plants. Depending on the type of plant, each mother could produce tens, or even hundreds of identical offspring every couple of months. Asexual propagation is an invaluable tool used for many commercial greenhouse crops, as well as for hobby gardens. Without question, the fastest and easiest way to root stem cuttings is hydroponically.
Some methods incorporate extra aeration.
Air pumps or moistening devices provide stems with ample amounts of oxygen and water. Oxygen is vital to root development. The most common method used to root cuttings hydroponically is in one inch Rockwool cubes. The flat of cubes is pH balanced and soaked in a diluted, high phosphorus nutrient solution, then placed in a standard propagation tray. As you take the clippings, let them stand in water until you have as many as you need.