One Year Old Mango Tree . The agricultural research center in jazan region houses the oldest mango tree planted in saudi arabia, and it was a nucleus for the success of field experiments and then the success and spread of mango cultivation in the jazan region, until it became one of the most important agricultural products with economic feasibility for farmers. Video shows a three year old mango tree grown from a seed of kensington pride, also known as bowen, which is now producing fruits.#mang. Need help saving this 14 year old Mango tree gardening from www.reddit.com Mango yields (kensington pride) with age of trees The simple leaves are lanceolate in shape and can grow up to 30 cm (12. Ripen and slow down ripening;