Newhall Navel Orange Growth Habits

Growth
An 8-year-old tree is 2.5 meters tall, with a trunk circumference of 34 cm and a crown diameter of 3.4 meters x 3.1 meters. It produces three shoots annually, resulting in significant growth. It enters fruiting early, beginning fruiting in the third year after planting. The yield per plant is approximately 2.0 kg, and 8-9-year-old trees yield 40-60 kg. In a 6-year-old densely planted experimental garden at the Ganzhou Citrus Research Institute, using Wenzhou mandarin oranges as interstocks, the average yield per plant was 19.94 kg in November 1990, for a total yield of 3,323.3 kg per mu. Flowering period observations at the Ganzhou Citrus Research Institute in 1990 showed initial flowering from April 2-6, peak flowering from April 7-12, and final flowering on April 19. Fruit matures in mid-to-late November. Phenological Period: The main phenological periods for Newhall navel oranges in Ganzhou, Jiangxi, with abundant thermal conditions, are: spring bud break (March 3-5); spring shoot emergence (March 8-25); spring shoot self-pruning (April 5-20); bud formation (March 13-April 10); peak flowering (April 19-25); first physiological fruit drop (early to mid-May); second physiological fruit drop (late May to mid-June); summer shoot emergence (May 25-June 10); summer shoot self-pruning (July 8-28); autumn shoot emergence (August 18-28); and fruit ripening (early to mid-November).