Guavas (Psidium gujava) can be successfully grown in a wide range of soils, but they are susceptible to wet feet. Adequate moisture must be supplied, particularly prior to harvest.

FERTILISER REQUIREMENTS
Young trees should be supplied with 150-500 g 6:6:5 NPK balanced fertiliser every couple of months during the growing season, the amounts increasing with age. Older trees should be given about 500 g 6:6:5 NPK balanced fertiliser per cm of stem diameter, the application being split between spring and summer. Heavy bearing trees should be supplied with extra N shortly before flowering.

FURTHER READING
Malo, S.E. and Campbell, C.W. (1968). The Guava. Fruit Crop Facts Sheet No. 4, Florida Agricultural Extension Service, University of Florida, USA.

Stadler, J.D. and Nortje, B.K. (1972). Guava Cultivation. Information Bulletin No. 79, Fruit and Fruit Technology Research Institute, Stellenbosch, South Africa.