There are many plants that you never need to buy. Instead, take a cutting or two, root it in your garden and wait for it to grow. Jade, lavender, chrysanthemum, and butterfly bush are just a handful of plants that can be propagated from cuttings. Just snip a 6 to 8 inch piece of green growth, then remove all but just a few leaves at the top and stick it into the ground or into a pot of soil. The plant should take root in just a couple of weeks, and by next season, will be well established.