Opuntia FICUS-INDICA

Opuntia FICUS-INDICA - Indian fig opuntia, Barbary fig, cactus pear, prickly pear, spineless cactus, sabra.

Opuntia is a large genus of succulent plants in the cactus family (Cactaceae), including about 150-180 species distributed in the New World from Canada to South America. In nature, members of the genus occur in deserts, semi-deserts, dry savannas, prairies, woodlands, on rocky slopes, sandy plains, and other open habitats with bright sun and well-drained soils.

The plants usually develop as shrubby, trailing, or tree-like cacti with flattened jointed stems called cladodes or segments. Leaves in adult plants are reduced, with photosynthesis performed by green fleshy stem segments. Areoles bear spines and small barbed bristles - glochids, which easily detach and irritate the skin.

Flowers in opuntias are large, diurnal, usually yellow, orange, reddish, or pink, formed along the margins of mature segments. After pollination, fleshy fruits develop, often brightly colored and edible in many species. The seeds are hard, dense, enclosed in the fruit pulp, with a pronounced coat, which often results in prolonged germination.

Indian fig opuntia is widely cultivated for its edible fruits. The fruit is yellow, green, or red, pear-shaped, 5-7.5 cm (2.0-3.0 in) long, and covered with spines. Inside the fruit is whitish translucent pulp with a sweet taste and fairly large seeds.

The plant has flattened oval succulent stems covered with spines. The stems branch, forming a shrub up to 2-4 m (6.6-13.1 ft) tall. The leaves are cylindrical, resembling spines, green, present only on young growing shoots, and drop quickly. Flowers are yellow, formed in the upper part of the stems.

Opuntia seeds are medium-sized for cacti, light beige or yellowish-brown, rounded, flattened-globose, or slightly irregular in shape, with a dense, hard coat. To accelerate germination, very gentle mechanical scarification with sandpaper or careful nicking of the seed edge without damaging the embryo is permissible. Seed germination in neat greenhouse conditions is usually about 50-80%.

Sowing is carried out in spring or year-round with stable supplemental lighting. A sterile, fine-grained mineral substrate based on sifted cactus soil, fine sand, perlite, and mineral grit is used. Seeds are laid on the surface, lightly pressed into the moist soil, and covered with a thin layer of fine sand about 1-2 mm (0.04-0.08 in) thick. Sowing is moistened from a spray bottle with a weak solution of potassium permanganate or biofungicide with the addition of a growth stimulator: SUPERthrive, HB-101, Aminosol, Epin, or Zircon. The container is covered with a transparent lid or placed in a propagator.

Germination is carried out in bright indirect light at a temperature of around 24-28 °C (75-82 °F), without direct sun overheating. The surface is kept moderately moist but not soggy; watering is done only with a fine mist. Sowings are ventilated daily and condensation is wiped away, since stagnant moisture is hazardous for opuntia seedlings and quickly causes fungal issues.

Initial seedlings may appear in 10-14 days; the usual germination period is 2-6 weeks, while the maximum possible period with a dense seed coat, temperature fluctuations, or partial drying of the surface can extend up to 2-3 months. After sprouting, the cover is gradually opened, and seedlings are kept in bright indirect light with careful moisture. Pricking out is carried out after the plants noticeably strengthen and form their first small pads, with minimal root disturbance.

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For cultivation, choose the brightest possible spot with direct sunlight for most of the day. South, southeast, and southwest windows, open sunny balconies, and well-ventilated terraces are best suited. With insufficient light, segments stretch out, become thin, soft, and less tolerant of watering.

During active growth, maintain a temperature of around 22-30 °C (72-86 °F) with good air movement. The plant tolerates heat and dry air as long as the roots are not in overheated wet soil. Winter dormancy should be bright, dry, and cool, around 5-12 °C (41-54 °F). During cool conditions, watering is almost completely suspended, since wet substrate combined with low temperature quickly leads to root and stem base rot.

Watering is carried out moderately, only after the substrate has completely dried out. In spring and summer, the soil is moistened in small portions, always draining excess water from the tray. In autumn, watering is gradually reduced, and in winter the plant is kept almost dry. Spraying is not required, and water on areoles or joints between segments is undesirable with poor ventilation.

Use a very loose mineral cactus substrate with a high proportion of coarse sand, fine gravel, pumice, zeolite, perlite, or other inert aerators. The organic component is added moderately. Place a tall drainage layer at the bottom of the pot, and choose a stable, heavy, and not excessively deep container with essential drainage holes.

Fertilizer is applied only during active growth, once every 4-6 weeks with a weak solution of cactus and succulent fertilizer low in nitrogen. Excess nutrients cause watery, loose growth and reduce resistance to rot. Repotting is carried out in spring as the pot fills with roots; after repotting, keep the plant without water for several days. When handling the plant, wear thick gloves or use tongs, as glochids detach easily from the areoles.