Keep your Bougainvillea on the dry side and in a pot that is just big enough, never too big. They are heavy feeders and will appreciate being fertilized at every other watering with a water-soluble fertilizer. In periods of more active growth you may want to fertilize even more often than that. A slow release fertilizer is another good choice, if you don't like having to mix fertilizer solution on a regular basis.
Bougainvilleas have delicate root systems and like to be pot-bound so re-potting should be done as infrequently as possible. When transferring the plant, take extra care with the root-ball; try not to traumatize it too much. I like clay pots, personally, as they offer the best air exchange and help the potting mix dry out most quickly.
Plants can be easily propagated from cuttings. Cuttings should be about 5 inches long and will root in one to two months. While cuttings are rooting, keep them out of direct sun, provide them with mild temperatures and keep humidity up.
Potential pests you may find on your Bougainvillea depend on where its been; if you summer it outdoors you may find a few more types of insects than if you keep indoors year-round. Mealybugs and spider mites are the most common nuisances but both can be discouraged by the use of a systemic insecticide. If that is not enough, mealybugs may be removed with cotton swabs dipped in rubbing alcohol and spider mites can be wiped from the bottoms of leaves with a soapy washcloth. Horticultural oil is a good choice for managing both when the more basic methods fail.
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