How Fast Does a Hawaiian Papaya Tree Grow?

Growth Rate & Size

• A papaya tree can grow to between 6 and 10 feet tall during its first year of life. Plants that grow 25 or more inches per year are classified as having a fast growth rate, according to the Arbor Day Foundation. Although the species can reach heights of 30 feet, Hawaiian papaya varieties reach maximum heights of around 8 feet, so they may reach their full growth potential during their first or second year of life.

Climate

• The Hawaiian papaya is native to tropical America and will not tolerate freezing temperatures -- even for a short period of time. In fact, temperatures slightly above freezing may still kill the plant. The leader is very susceptible to cold damage, as it is not a true trunk and does not develop protective bark. Thriving in U.S. Department of Agriculture plant hardiness zones 10 and 11, the Hawaiian papaya is usually only cultivated in Southern Florida, Southern California and Hawaii.

Culture

• Papaya thrives in fertile, moist but well-draining soil. The plant enjoys humid conditions and needs 4 inches of rain per month for best growth, although this varies according to weather. In general, the warmer the temperatures, the more water is needed. Full sunlight is best for the Hawaiian papaya. Plants grown in partial shade produce fruit that is not as sweet, according to Floridata.

Fruit

• Young plants grow rapidly and produce more fruit than their aging counterparts. In addition, papayas are susceptible to natural enemies, according to Purdue University. They are not long-lived or strong trees, but because they grow quickly and produce fruit right away, they are still worth cultivating. For these reasons, home gardeners often stagger their plantings. The fruit tastes the best when it is allowed to ripen on the tree. In fact, it's important that you let the fruit ripen before you eat it -- unless you cook it -- because raw unripened papaya fruit and leaves are toxic.