How does plant cutting work? Can any part of the plant be cut and regrown? How do you take and grow a plant cutting?
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It depends on the plant. Some plants can be spread through simply cuttings, other plants requiring grafting a cutting into a root, other plants cannot be spread this way at all.
But generally speaking, plants like say rosemary have “nodes” on the stem that you can see, these nodes are where new branches will split off, but if you cut right beneath it they are also where new roots can form.
Another common plant are Pothos, they’re super common house/office plants, and if you cut right beneath a node you can just put it in water and it’ll survive and grow roots.
Grafting is a bit different, where the part you cut will not just start growing roots of its own, so you also have to take some of the root system of a the donor plant and splice the two together for it to survive.
Nowadays a lot of this is sped up by using special “gels” or “oils” that have a rooting hormone in them that helps spur the plant to start growing roots at the cutting.
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