Origin and Habitat: Garden origin (Nursery produced cultivar)

• Echinopsis cv. Haku-jo Maru f. cristata monstruosa

• Echinopsis cv. Haku-jo Maru
• Echinopsis cv. Haku-jo Maru f. cristata
• Echinopsis cv. Haku-jo Maru f. cristata monstruosa

Description: Echinopsis cv. Haku-jo MaruSN|14675]]SN|14675]] is a famous Japanese cultivar with a very peculiar rib shape. It is a relatively common plant in its normal form, but this beautiful crested variant is very-very rare and priced by cactus collectors. The most striking feature are the woolly areoles on the ribs that have a felty line between them so it seems like the areoles are connected with each other.
forma cristata monstruosa: The rare crested and monstrous form distinguishes for the unstructured surface with ribs almost indistinguibile. The areoles are irregularly connected by more or less extensive brownish felty zones between them, giving the whole plant a furry appearance.
Remarks: It is thought that this interesting cultivar is a chimaeric plant composed of two genetically different strata of cells. This meristematic mutation originated probably from a normal Echinopsis. Echinopsis cv. Haku-jo MaruSN|14675]]SN|14675]]
is a relatively common plant in its normal form, but this beautiful crested end monstrous variant is very-very rare and priced by cactus collectors.

Cultivation and Propagation: It is a fairly easy plant to grow both grafted or in its own roots. During the summer it is best to keep the plants outside where the temperature can rise to over 30 C with no harm to the plant. Furnish good drainage and use a an open and free draining mineral compost that allows therefore roots to breath. They like only a short winter's rest and should be kept almost completely dry during the winter months, If the soil is allowed to be dry for too long root loss could follow but equally the same result would occur if the plants are both wet and cold. From March onwards the plant will begin to grow and watering should be increased gradually until late May when the plant should be in full growth.
Water regularly during the summer so long as the plant pot is allowed to drain and not sit in a tray of water. During hot weather you may need to water the plants more frequently so long as the plant is actively growing. From late September watering should be reduced to force the plant to go in to a state of semi dormancy, by October you should be back in to the winter watering regime.
Need full sun avoiding only the harshest summer sun, if kept too dark they may become overly lush and greener and could be prone to rotting due to over watering.
Feeding may not be necessary at all if the compost is fresh then, feed in summer only if the plant hasn't been repotted recently. Do not feed the plants from September onwards as this can cause lush growth which can be fatal during the darker cold months.
Propagation: By vegetative propagation grafting or stem cuttings from adult plants.