Yes, most of the time. You can clone the bud or undergrowth of a flowering plant. To promote rooting, place the plant under continuous light under a cool-white fluorescent at a ratio of 10 watts per square foot.
The earlier the stage of flowering, the faster the cutting will return to vegetative state as it grows roots. Buds growing under the canopy seem to revert more quickly.
Varieties differ in how well they revegetate. Many reach a point of no return. They continue to flower and then die regardless of the lighting regimen. When this occurs it is usually in the last phases of flowering. Sativas are generally easier to revert than Indicas.
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