Japanese Camellias require consistent moisture, especially during dry spells and when flowering. Water deeply when the top few centimeters of soil feel dry, but ensure excellent drainage to prevent root rot.

Reduce watering slightly in winter, but never let the soil dry out completely. Mulching helps retain soil moisture.

Prune Japanese Camellias immediately after flowering to maintain shape, remove dead or damaged branches, and improve air circulation. Light pruning is usually sufficient.

Avoid heavy pruning into old wood unless rejuvenating an plant, as it may reduce flowering for the following season.

Propagate Camellia japonica primarily through semi-hardwood cuttings taken in late summer or early autumn. Rooting hormone can improve success rates.

Cuttings should be placed in a well-draining, moist rooting medium under high humidity. Seed propagation is also possible but takes longer and may not produce true-to-type plants.

Repot container-grown Japanese Camellias every 2-3 years, or when they become root-bound, typically in spring after flowering.

Choose a pot only slightly larger than the previous one and use a fresh, acidic, well-draining potting mix. Avoid disturbing the root ball excessively during the process to minimize stress.