Sour oranges prefer consistently moist soil, especially during their active growth period. Water thoroughly when the top 2-5 cm of soil feels dry to the touch.

Reduce watering in winter, allowing the soil to dry out slightly more between waterings to prevent root rot. Ensure good drainage.

Prune sour oranges in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches.

Thin out dense foliage to improve air circulation and light penetration, which helps prevent diseases. Shaping can be done to maintain a desired size and form.

Sour oranges are commonly propagated by grafting onto rootstock, such as trifoliate orange, for improved disease resistance and adaptability.

Seeds can be sown but may not produce true-to-type fruit and take many years to mature. Cuttings are also possible but can be slow to root.

Repot young sour oranges every 1-2 years in spring as they outgrow their containers. Mature trees can be repotted every 3-5 years or when rootbound. Use a well-draining potting mix specifically formulated for citrus.

Choose a pot that is only slightly larger than the current one.