Culture
Winter hardy to USDA Zones 8-10 where this evergreen shrub is typically grown in organically rich, acidic, well-drained soils with consistent moisture in part shade locations. Established plants do well with moderate but even moisture. Plants appreciate protection from early morning sun and from direct hot afternoon sun. They often thrive in sun-dappled part shade conditions under the protection of tree canopies. Protection from strong winds is also important. Apply a root mulch (leaves or shredded bark). Prune after flowering to thin branching and to control size and shape. Most camellias are purchased in pots. When transplanting them into the garden, it is important to not plant them too deep (soil level of the ground should be the same as the soil level in the pot). Plants may be effectively grown in tubs or other large containers. This camellia is not reliably winter hardy to the St. Louis area (USDA Zone 6a). It may be grown in containers that are overwintered indoors in a cool greenhouse where necessary growing conditions (including bright light and cool winter temperatures of 45-60 degrees F) can be met.
Noteworthy Characteristics
Camellia reticulata is native to Yunnan Province in China where it has been cultivated since at least 900 A.D. Today, over 100 named cultivars or varieties of C. reticulata are known to have originated in Yunnan. This camellia typically grows as a shrub to 8-10' tall, but in the wild in its native habitat it may grow as a small tree to 20' tall. Serrate, dark green leaves (to 4" long) are evergreen. Flowers bloom from early to mid-season.
Genus name honors Georg Joseph Camel (1661-1706), a German Jesuit missionary to the Philippines who was noted for his work on Oriental plants.
Specific epithet means netted, with a net-like pattern.
'Dataohong' (sold in the U. S. under its translated name of CRIMSON ROBE) is one of eighteen C. reticulata cultivars that were first introduced to the West in 1948-1949 in a shipment of plants from the Yunnan Botanical Institute in Kunming to two California researchers. CRIMSON ROSE features large, semi-double, carmine red flowers (to 7" across) with crinkled, wavy petals.
Problems
Camellias are susceptible to a number of fungal diseases including leaf spots, anthracnose, viruses, black mold, petal blight, canker and root rot. If petal blight occurs (browning that runs from edges to the center), all infected plant parts should be promptly removed. Yellow leaves with green veins may indicate chlorosis which can be treated by adding iron/iron chelates to the soil. Scale can be a troublesome insect pest. Watch for aphids, planthoppers and spider mites.
Uses
Where winter hardy, this camellia is an excellent flowering evergreen shrub (specimen or in small groups) that provides exciting winter to spring bloom for woodland gardens, shrub borders, backgrounds, lawns and around homes.