For making cuttings in moss this is the way that I do it. There is moss that grows all over my yard so I have tons of moss to use. I first get a bunch of moss in 5 gallon buckets and of course a tray . Here are some pictures of the process.
This is a picture of the moss growing in my yard, I like to use live moss because it helps to keep the fungus and mold from attacking the baby kava plants that will be growing.
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This is the tray that I use, just like Alia showed you.
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This is where I put a layer of moss in the entire try, the layer is about 1/2-1 inch thick. I just filled part of the tray with moss for demonstration purposes.
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The next picture shows how I place the cutting on the moss. Each cutting will have an eye or 2 and this is where the baby kava plant will be growing from, you want to make sure this eye points up as much as possible, pointing to the side a bit is okay.
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This is a picture of me pointing to the eye on the kava cutting.
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Then I will cover the cuttings with moss, this layer will be like the bottom layer but I will make sure I cover the ends of the cuttings with moss and most of the rest of the cutting too, I will leave the moss thin or even a small hole where the eye is so that it will be able to pop through the moss without too much trouble, this picture shows me pointing at the area where the eye is, you can see there is little to no moss there.
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You want to make sure you keep them in the shade and keep them moist. It is okay to let them dry out for a day but not too long, they need the moisture for the roots to grow. In about 2-3 months you can carefully pull some of the moss away to see if you have roots on the cuttings, you will also see some of the leaves and shoots popping out at about this time, it will look like this.
This is what the cutting will look like with the roots.
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After it has roots like this last picture you can transplant it into small pots with a good soil/compost mix and cinder if you have some. Please let me know if you have any questions and I hope this helps you all to understand how to make kava plants from cuttings.
Aloha.
Chris