Opuntia ficus-indica
| Light | Full sun; the more the better once established |
|---|---|
| Water | Drought-tolerant; water when the mix is fully dry, keep dry in cold weather |
| Soil | Fast-draining gritty mix (see Soil and potting mix); tolerant of poorer soils than most cacti |
| Temperature | Best above freezing; mature plants tolerate brief light frost in dry conditions; USDA zones 9–11 |
| Propagation | Pads (the standard method); also seed |
| Toxicity | Non-toxic if eaten, but glochids irritate skin, mouth and pets — handle with care |
Opuntia ficus-indica is the domesticated prickly pear, a large, tree-like Opuntia grown around the world for its edible pads (nopales) and sweet fruit (tunas). Selected over millennia for food, it is typically nearly spineless and among the most economically important cacti on Earth, cultivated across the Americas, the Mediterranean, North Africa, the Middle East and Australia. It is also known as the Indian fig, Barbary fig and nopal.
Description
Opuntia ficus-indica is a shrubby to tree-like cactus that can reach several metres tall, developing a woody, trunk-like base with age. Its stems are built from flattened, oval to oblong pads (technically cladodes) 20–40 cm long, blue-green to green and thickly succulent. Cultivated forms are usually nearly spineless, though the pads still bear areoles studded with glochids — tiny, barbed bristles that detach at a touch and are far more irritating to skin than any large spine.
Large, bowl-shaped flowers appear along the pad margins in spring and early summer, in shades of yellow, orange and occasionally red. These are followed by the fruit: fleshy, egg-shaped tunas that ripen yellow, orange, red or purple depending on the strain, filled with sweet pulp and hard seeds. Both the young pads and the ripe fruit are harvested and eaten.
Distribution and habitat
The species is of Mexican origin and has been cultivated for so long that a truly wild ancestral population is difficult to pin down; it is thought to derive from wild Opuntia of central Mexico. Domesticated and spread first by Indigenous peoples of Mesoamerica and later carried worldwide after European contact, it is now naturalised across warm, dry regions of the Mediterranean basin, North and South Africa, the Middle East, India and Australia.
It thrives in hot, arid and semi-arid country with poor, well-drained soils, and is highly drought-tolerant once established. In several regions — most notoriously parts of Australia and South Africa — escaped plants have become serious invasive weeds, so check local rules before planting it out in the ground.
Cultivation
This is one of the easiest and most forgiving cacti to grow. Give it as much full sun as possible and a free-draining, gritty mix; it accepts poorer soils than most collector cacti. Water when the mix has dried out during the warm growing season, then let it dry again — mature plants store enough water to shrug off long dry spells. Keep the plant dry through cold weather, as wet cold is the main cause of rot.
Grown in the open in a suitable climate it becomes a fast, vigorous, large plant, so give it room. In containers it stays more manageable but still wants a big pot and regular repotting; see Repotting and Watering for general technique. Even on "spineless" strains, always handle pads and fruit with thick gloves or tongs — the glochids are the real hazard, and they lodge in skin, lips and pets' paws.
Propagation
Propagation from pads is by far the simplest method and the traditional way to increase the plant. Detach a healthy pad at the joint, let the cut surface callus over for several days to a week or two, then set it upright (or lay it partly on the surface) in dry, gritty mix; it roots readily and grows away quickly. Seed also works but is slower and, because the plant is a selected crop, seedlings may not come true to the parent. See Propagation — cuttings and Propagation — seed for full walkthroughs.
Cultivars
Because it is a long-domesticated food crop, many regional strains and named selections exist, chosen for spinelessness, pad tenderness, and fruit colour, size and sweetness. Fruit strains ripen in a range of colours from pale yellow-green through orange and red to deep purple. Selection for reduced spines and glochids has been a major goal of breeding, though no cultivated form is ever entirely free of glochids.
Common problems
- Glochids — not a disease but the commonest complaint: the fine barbed bristles detach at a touch and are irritating and fiddly to remove. Handle with gloves and keep plants away from paths, children and pets.
- Rot — from cold, wet conditions or a poorly drained mix; pads soften, discolour and collapse.
- Cochineal scale — a white, cottony insect that colonises the pads and crushes to a deep red; historically farmed on Opuntia for dye, but a pest in the garden.
- Pests — mealybugs and, in dry indoor conditions, spider mites can also trouble it.
Legal status
While the plant itself is unrestricted, O. ficus-indica and other prickly pears are declared invasive or noxious weeds in some jurisdictions — notably parts of Australia and South Africa — where planting or spreading them is regulated. Anyone growing it in the ground should check regional weed legislation first.
See also
- Opuntia — the genus overview
- Propagation — cuttings · Propagation — seed · Soil and potting mix · Watering · Repotting · Pests and diseases