Kumquats require consistent moisture, especially when flowering and fruiting. Water deeply when the top few centimeters of soil feel dry, ensuring good drainage to prevent root rot.

Reduce watering slightly during cooler, less active periods, but never let the soil dry out completely. Container plants may need more frequent watering than those in the ground.

Prune kumquat trees primarily to maintain a desirable shape, remove any dead, diseased, or crossing branches, and to encourage better air circulation and fruit production.

The ideal time for significant pruning is after the last harvest, typically in late winter or early spring before new growth emerges. Light shaping and removal of suckers can be done throughout the year as needed.

Kumquats are commonly propagated by grafting onto suitable rootstock for improved vigor and disease resistance. They can also be grown from seeds, though this may not produce true-to-type fruit and takes longer to bear.

Cuttings can be rooted, but success rates vary and often require specific conditions like bottom heat and high humidity.

Repot young kumquat trees every 1-2 years into a slightly larger container to accommodate root growth. Mature container plants may only need repotting every 3-5 years, or simply top-dressing with fresh soil.

Choose a well-draining potting mix formulated for citrus. Repot in spring before new growth starts, disturbing roots as little as possible.