In this photo taken on Saturday, Feb. 9, 2013, instructor Ted Smith, left, shows Ginger and Heath Grider how to cut and plant a section of a tomato plant during class at THC University at the Tivoli in Denver. Marijuana can be grown from seed, or from a clipping off a "mother" marijuana plant. Clones, as the clippings are called, grow faster and produce smokeable marijuana much more quickly than seeds. But seeds can be worth the wait, producing hardier marijuana.
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