Deep, regular irrigation; not a low-water desert tree. Water established trees throughout the root zone to about 2–3 feet deep, allowing the upper few inches of soil to dry between irrigations. Water more frequently during extreme heat and less in winter; keep the trunk base dry.
Size
15-20 ft tall × 10-15 ft wide
Habit
Upright tree – single-trunk
Toxicity
Toxic — Pets & Humans
Description
Sour orange, also called bitter or Seville orange, is a thorny citrus tree with glossy leaves, fragrant blossoms, and thick-skinned, tart orange fruit used for marmalade, marinades, and preserves.
Toxic to pets (mild GI upset); bitter fruit edible to humans when processed
Care Instructions
Light: Full sun; young trees benefit from afternoon shade during Phoenix summers. Protect exposed bark from intense sun.
Water: Deep, regular irrigation; not a low-water desert tree. Water established trees throughout the root zone to about 2–3 feet deep, allowing the upper few inches of soil to dry between irrigations. Water more frequently during extreme heat and less in winter; keep the trunk base dry.
Soil: Well-drained soil; sandy loam preferred. Tolerates moderately alkaline soil, but poor drainage and salt buildup cause problems. Avoid planting too deeply or in low spots.
Mature size: Typically 15–25 feet tall and 15–20 feet wide; size varies with rootstock, growing conditions, and pruning.
Bloom: Primarily late winter through spring in Phoenix; fruit generally ripens in winter and can remain on the tree for months.