Plant cutting, also known as striking or cloning, is a technique for vegetatively (asexually) propagating plants in which a piece of the stem or root of the source plant is placed in a suitable medium such as moist soil, potting mix, coir or rock wool. The cutting produces new roots, stems, or both, and thus becomes a new plant independent of the parent.
In addition, the cutting needs to be taken correctly. It must be taken at the right time; in temperate countries, stem cuttings of young wood need to be taken in spring, of hardened wood they need to be taken in winter. It must have the right size and amount of foliage; length of stem cuttings of soft wood for example need to be between 5–15 cm and of hard wood between 20–25 cm. Also, two thirds of the foliage of soft wood stem cuttings should be removed. For hard wood stem cuttings, complete foliage removal is necessary.
Some plants form roots much more easily. Most succulent cuttings can be left on a table and small roots will form, and some other plants can form roots from having their cuttings placed in a cup of water.
Many vegetative parts of a plant can be used. The most common methods are:-
Typically, striking is a simple process in which a small amount of the parent plant is removed. This removed piece, called the cutting, is then encouraged to grow as an independent plant.
Since most plant cuttings will have no root system of their own, they are likely to die from dehydration if the proper conditions are not met. They require a moist medium, which, however, cannot be too wet lest the cutting rot. A number of media are used in this process, including but not limited to soil, perlite, vermiculite, coir, rock wool, expanded clay pellets, and even water given the right conditions. The environment should be humid (this generally means placing the cuttings under a plastic sheet or in another confined space where the air can be kept moist) and partial shade should be provided, also to prevent the cutting from drying out. After cuttings are placed in the medium, they are watered thoroughly with a fine mist, such as from a nozzle sprayer or a spray mister bottle. After the initial watering, the medium is allowed to almost dry out before misting again, with the aim to keep the soil moist but not wet and waterlogged. A fine mist is used to avoid disturbing plants.
There are ways of improving the growth of stem cutting propagations. Intensifying light allows cuttings to root and sprout faster, apart from the concern that this could cause the propagation material distress.  Azalea cuttings can be mildly heated in water to disinfect it from the fungus pathogen Rhizoctonia, and this could potentially be used for other plants. 
Depending on the type of soil being used, several additives may need adding to create good soil for cuttings. These additions may include:
Although some species, such as willow, blackberry and pelargoniums can be grown simply by placing a cutting into moist ground, the majority of species require more attention. Most species require humid, warm, partially shaded conditions to strike, thus requiring the approach above to be followed. Particularly difficult species may need cool air above and warm soil. In addition, with many more difficult cuttings, one should use the type of cutting that has the most chance of success with that particular plant species. 
Plant propagation/Cloning Plant cutting , also known as striking or cloning , is a technique for vegetatively (asexually) propagating plants in which a piece of the stem or root of the
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Part 3 of the series where Gary gives his tips and tricks on cleaning, filling, and maintaining your cloner and pumps can be found here: https://youtu.be/cUpPW8SKhEQ
Gary is the owner of both PA Hydroponics & All Good Garden Supply as well as one of the in house experts in hydroponics and indoor/outdoor gardening.
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Gary from PA Hydroponics adds on to the series on cloning by showing you how to clone in soil instead of in a hydroponic clone machine.
Part 1 of the series where Gary gives a detailed intro to clones, cloning, and their tips and tricks can be found here: https://youtu.be/nqR217ZphfI
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Gary from PA Hydroponics adds on to the series on cloning by showing you how to clone in soil instead of in a hydroponic clone machine. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬…