Owing to its hardy nature, guava is grown successfully in tropical and subtropical regions up to 1,500 m (4,900 ft) above mean sea-level. Best quality guavas are obtained where low night temperatures, 10 °C (50 °F), prevail during winter. It tolerates high temperatures and drought conditions in North India during summers but it is susceptible to severe frost as it can kill the young plants. An annual rainfall of about 100 cm (39 in) is sufficient during the rainy season (July–September). The rains during harvesting period, however, deteriorate the quality of fruits.