Water young Daimyo Oaks regularly, especially during dry spells, to establish a strong root system.

Once mature, they are relatively drought-tolerant but will benefit from occasional deep watering during prolonged periods of extreme heat. Avoid waterlogged soil, which can lead to root rot.

Prune Daimyo Oaks primarily to remove dead, damaged, or crossing branches. This is best done during the dormant season (late winter to early spring) to minimize stress.

Avoid excessive pruning, as they are generally slow-growing and recover poorly from heavy cuts.

Propagate Daimyo Oaks from acorns, which should be collected when ripe in autumn. Stratify seeds by storing them in a moist medium (like sand or peat moss) in a refrigerator for several months before sowing.

Grafting can also be used for specific cultivars.

Repotting is typically only necessary for young Daimyo Oaks in containers. If a young tree becomes root-bound, repot in early spring into a slightly larger container with well-draining potting mix.

Mature trees are best left undisturbed in their natural environment.