Psidium guajava, commonly known as the guava tree, is not typically grown as a houseplant due to its large size and specific care requirements. Guava trees are usually cultivated in tropical or subtropical regions and can reach heights of up to 30 feet or more. However, if you're determined to grow a guava tree indoors, you'll need a spacious and sunny spot with plenty of direct sunlight, ideally at least 6-8 hours a day. Use well-draining soil and ensure the plant receives adequate water without becoming waterlogged. Keep the humidity levels high and maintain a temperature range between 65°F to 80°F (18°C to 27°C). Pruning is essential to control its size and shape, and occasional fertilization with a balanced fertilizer can support healthy growth. While it's a challenging choice for a houseplant, the reward of enjoying homegrown guavas can be worth the effort for dedicated enthusiasts.