Bougainvillea are fast-growing plants that can quickly outgrow their pots. They typically grow to 3-6 feet tall in containers, but can reach up to 20 feet tall when grown outdoors. When growing bougainvillea in pots, it is important to choose a pot that is large enough to accommodate the plant's roots and allow for proper drainage. Bougainvillea also prefer full sun, so choose a spot in your yard or garden that gets at least 6 hours of sunlight per day.Water your bougainvillea regularly, keeping the soil moist but not soggy. fertilize your plant every few weeks with a balanced fertilizer to help it grow strong and healthy. With proper care, your bougainvillea should thrive in its new home.