Guava tree or shrub has been domesticated  thousand  years ago in  South America.It is a common plant throughout the tropics.

Allahabad Guava (safeda)
Very large yellow skinned, white fleshed fruit with few seeds.
White Tropical
Common type of guava sold by various nurseries in Phoenix .

These are easiest one to grow in Phoenix among all the tropical plants . Guavas thrive in both humid and dry climates. They can survive few degrees of frost for short duration. Guava grow in almost any type of soil, but will produce better in rich soils that are high in organic matter with good drainage. They can tolerate hot arid climate in our desert.

Plant Care

Guava plant is drought tolerant when established. In order to get good fruit crop, it needs to be watered regularly in the summer months. As with all my fruits trees I irrigate them 7-14 days during growing season and every 4-6 week during the winter.
We have 3-5 inch thick layer of partially compost mulch around the tree,which provide all the nutrient needed. As it is vigorous growing tree, it need regular fertilizer during the summer months.
Frost Protection
It is important to protect from winter frost when trees are young. I use 55 gallon plastic barrel filled with water close to the tree. Water can heat up from direct sun during the day time and store the heat. It radiates heat at night time when the temperature drops. I find this method very helpful in preventing frost damage. Guava trees shown here were planted about 20 months back (2008), and are already more than 10 feet high and had lots of fruits last year.

Medicinal Uses
  In folk Medicine of native country Guava leaves are use to treat diarrhea , dysentery  ,sore throat and bleeding gum .Guava Plant is also  used as a remedy for skin irritation and to control vomiting and vertigo