Again, with proper care, cultural practices, and a favorable root stock, a citrus tree is capable of producing fruit in excess of 50 years. One such example is the original Washington Navel orange brought first from Brazil to Washington D.C., then to California in 1873. One hundred years later it was still alive and producing fruit. The deepest orange color of both peel and juice is produced in the cooler areas. The thickest peel develops in dry regions, and the juiciest fruit under wet, humid conditions.
Grapefruit is acid in cool climates and sweet in hot ones.
The flesh of blood oranges turns red in cool climates, but in warmer regions it is often mottled or lacking in red. The first step toward successfully growing citrus trees is to take the time to find out which varieties grow best in your area. If possible, buy from a nursery that grows their own trees or at least find out where the trees were grown. This will help ensure that the variety you select will grow well in your area. Usually, citrus nurseries will only sell what will grow in their area, but some varieties are hardier and require less nurturing.