My biggest papaya plant is out by the street and grows CLOSE to a Cassia alata shrub, which some feel is a nitrogen fixer....I can't help but suspect this is why it dwarfs others in the yard that are actually much better fed and watered. Visitors marvel at the size of the "trunk". It is a seedling of 'Caribbean Red', is seventeen months old from seed, and the ripe fruits are deeply colored and wonderfully fragrant and flavorful. I'm guessing it is about fifteen feet tall. I hope I don't lose it this winter to a hard freeze!