Nopal

Growing in Pots, Balconies & Indoors

Nopal (edible Opuntia) is a pad cactus that reaches 2-4 m (6-12 ft). The grower does not class it as a houseplant, but it grows in a pot as long as you do not let it get too large. It takes full sun to part shade; a young plant can sit on a sunny windowsill before it wants a big tub outdoors. Handle with care – the pads carry spines and fine glochids, so keep it away from children and pets.

Quick Details

• Container Size: A roomy pot; keep it pruned so it does not grow too large, as the grower advises
• Indoor Suitability: Not a houseplant; only a very sunny window suits a young plant
• Best Spot: Full sun to part shade – the sunniest sill while young, then a sunny patio
• Soil & Drainage: Free-draining cactus/succulent mix over a gravel or lava-rock base; strong drainage holes
• Watering in Pots: Water sparingly and let the mix dry out between waterings; cut back further in the cool dormant season – pots must never stay wet

Indoors & On the Windowsill

• Not a houseplant: The grower does not recommend it indoors – it wants strong sun and grows large.
• Windowsill growing: A young plant is fine on a sunny sill, but keep it pruned and expect to move it outside as it grows.
• Safety: Spines and glochids irritate skin – keep it away from children and pets.
• Overwintering: Frost-tender – keep it bright, frost-free and nearly dry over winter.

On a Balcony or Patio

• Light & wind: Full sun to part shade on a sheltered balcony; prune it back so it does not outgrow the pot, and site it away from paths and seating.
• Bring it in for winter: Move the pot under cover before frost.

Choosing the Pot, Soil & Long-Term Care

• Keep it compact (grower): The grower advises not letting it grow too large in a container – prune the pads to keep it manageable.
• Pot & drainage: Use a pot only 20-50% larger than the plant – it need not be deep, since the roots run shallow. Add a layer of gravel, lava rock or pebbles in the base, give it strong drainage holes, and never leave it standing in water.
• Potting mix: A free-draining cactus and succulent mix – gritty and well aerated so it dries quickly.
• Feeding: Potted cacti need only light feeding, as nutrients leach out with each watering; a dilute low-nitrogen cactus feed through the warm growing season is enough.
• Repotting: Every few years, once the roots fill the pot or the mix has broken down, refresh the soil and move up one size.

Bloom & Edible Flower Guide

Quick Details

• Bloom Season: Spring
• Flower Appearance: Large, waxy, cup-shaped flowers in orange, yellow or pink, set along the edges of the pads
• Edibility: Edible — prickly pear (Opuntia) flowers are edible; brush off the tiny glochid spines first

Detailed Blooming Overview

In spring the prickly pear rings its flattened pads with big, satiny cup-shaped flowers in warm oranges, yellows and pinks. They are rich in pollen and heavily worked by bees. The flowers are edible once the fine glochid spines are carefully removed.

Flower Characteristics

• Large, glossy, cup-shaped flowers in orange, yellow or pink.
• Borne along the margins of the pads.

Bloom Care & Thinning

• Managing the bloom: If you do not want the plant to set fruit, removing spent flowers keeps it looking tidy.
• Pollination: Worked by bees.