Does anyone know how to clone?
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No, it's a complete mystery. Sorry for the sarcasm just it's very easy. You just get some peat pellets, sold for starting seedlings, soak em in water until they expand fully and won't absorb any more, take as big of cuttings as you can, like maximum 8", spray them with water as soon as possible, including the cut ends, and keep them in a plastic bag until you get them processed, meaning making a new clean cut with a razor blade after cutting off any lower branches so there's enough clean stem to stick into the pellets, dipping the lower 1-2 cm in rooting gel, not powder because it dries it out and is mainly for rooting tree cuttings, then cut off the ends of the large leaves to reduce water requirement and make them easier to fit into a clone chamber.
For the chamber, some kind of container that will retain moisture and supply light. I recommend a 40w replacement LED bulb, like 2700k color. What I did myself was mount the bulb in the bottom of one container, in a socket which I mounted through a hole I drilled with a saw toothed couple inches diameter hole cutting bit and then turned it upside down over another similar container. I drilled a few holes a couple inches up from the bottom of the lower container for air. Each container is about 10" high. I put some clips on the edges where they meet, to hold them together when I move the chamber around.
Then I just put the cuttings, stuck in the peat pellets, in the bottom container, which fills them right up wall to wall. I put 12 in, 3x4. Then I lay a sheet of clear poly, from a clear garbage bag, over the top of the lower container and put the top container on over the plastic and clip the containers together and plug the cord in and leave it on 24/7, sitting on somewhere a little warm. After 3 days I water the pellets with a mild nutrient solution, pulling out the runoff with a turkey baster after tilting the container so it all runs into one corner. After 5 days they have roots starting to grow out through the pellets, at which point I pot em up and keep them in the container, without the plastic, until well established. I also drilled air holes in the top container to avoid heat buildup.
That's how I did it. You could use some other type of clone chamber, even a commercial one. The important things are the 40w LED bulb (5w actual power draw) and the peat pellets. Also not allowing the pellets to sit in water. You don't want them to stay too wet, which is why I just sit em on the bottom of the container, no extra water involved. The moisture in the pellets keeps the air humid enough and they gradually get less wet over the first 3 days, which prevents rotting of the cutting stems.
Also, if you see one or more cuttings have wilted after a while, you have to make a fresh cut on the end of the stem because it means that the original end sealed up and isn't drawing water anymore. It happens fairly frequently. You can make a new cut as often as required. Roots will grow out the sides of the stem anyway so the end being recut doesn't matter.