Cochemiea POSELGERI

Cochemiea POSELGERI - Poselger's cochemiea, Mammillaria poselgeri, Cochemiea poselgeri.

Cochemiea is a genus of cacti in the family Cactaceae, uniting species originating primarily from the Baja California peninsula in Mexico and adjacent islands. In nature, they grow in arid stony semi-deserts, on rocks, and on coastal slopes, enduring prolonged drought and intense solar radiation.

The stems are cylindrical or club-shaped, solitary or branching from the base, covered with spirally arranged tubercles. The leaves are completely reduced; radial and central spines emerge from the areoles at the tips of the tubercles, with the central spines hook-shaped in most species of the genus.

Flowering occurs in spring and summer. The flowers are funnel-shaped or tubular, up to 7 cm (2.8 in) long and up to 3 cm (1.2 in) across, opening in the upper part of the stem, colored from bright pink to red. After flowering, elongated berry-like fruits with small dark seeds form.

Poselger's cochemiea is a species from the Baja California peninsula, growing on dry stony slopes. The stem is erect, elongated, cylindrical, branching from the base with age to form loose clusters, and in old specimens often reclining and trailing, supported by surrounding shrubs.

The stem surface is covered with well-defined tubercles, from whose areoles emerge radial spines and long hook-shaped central ones. Flowering occurs in spring: the flowers are large by the standards of the genus, bright pink, funnel-shaped, with wide petals and yellow stamens in the center, opening during the day near the stem apex. The fruits are oblong, bright red.

Cochemiea seeds are small, dark, almost black, ripening in juicy elongated fruits. Pre-sowing treatment is not required; scarification and stratification are not needed. Soaking such small seeds is impractical, so the substrate itself is disinfected: before sowing, it is drenched with a weak solution of potassium permanganate and dried.

Sowing is carried out on the surface of a moistened cactus substrate with the addition of sand, without burying. The sowing is moistened from a spray bottle with a growth stimulant solution: SUPERthrive, HB-101, Aminozol, Epin, or Zircon, covered with glass, plastic wrap, or placed in a mini-greenhouse, and kept under stable lighting and a temperature of 22-26 °C (72-79 °F) with daily ventilation.

Under favorable conditions, the first sprouts appear after 10 days, main germination is usually completed within 3 weeks, while individual seeds can take longer than 35 days. Pricking out is carried out after the appearance of the first spines, when the seedlings reach 1-1.5 cm (0.4-0.6 in) across, into individual small pots with mineral substrate.

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The plant needs a bright location with bright diffused light or direct sun. With a lack of light, the stem stretches and loses its shape.

The optimal temperature in summer is 20-28 °C (68-82 °F), in winter around 10-15 °C (50-59 °F). A cool, dry dormancy is necessary for the setting of flower buds.

Watering is regular from spring to autumn, after the substrate dries out. In winter, with cool conditions, watering is reduced to about once a month.

A loose, well-drained cactus substrate is used, with the addition of coarse sand and brick grit. Drainage is placed at the bottom of the pot. Repotting is carried out once every 2-3 years in spring by the potting-on method.

Fertilizer is applied once a month during the period of active growth, using a specialized fertilizer for cacti and succulents. No fertilizing is carried out during the winter period.

Shaping is not required. In addition to seeds, the plant is propagated by offsets if they form.