Natal plum

Growing in Pots, Balconies & Indoors

Natal plum (Carissa macrocarpa) makes a genuine container and indoor plant – the grower confirms it can be grown indoors (though it may not fruit without some sun), and dwarf cultivars (20-50 cm) are ideal for pots, windowsills and bonsai. Give it a sunny spot if you want the fragrant flowers and fruit.

Quick Details

• Container Size: Start 20-30% larger than the root ball and step up (grower’s method); dwarf cultivars stay compact
• Indoor Suitability: A good houseplant for a bright spot – needs some direct sun to actually fruit
• Best Spot: Full sun to part shade (sun for flowers and fruit)
• Soil & Drainage: Good free-draining potting soil
• Watering in Pots: Average – it will take some drought but prefers steady moisture; never waterlogged

Indoors & On the Windowsill

• As a houseplant: The grower rates it Yes for indoors. Give it the brightest window you have, keep it warm, and it makes a handsome glossy evergreen; a dwarf cultivar is perfect for a sill or bonsai.
• For flowers and fruit: It needs real sun to bloom and set fruit – deep shade gives leaves only, so a sunny sill, sunroom or a spell outdoors in summer helps.
• Overwintering: Frost-tender – in cold climates keep the pot bright and frost-free over winter.
• Safety: All parts exude a white latex, and the unripe fruit is toxic – only the fully ripe fruit is edible. Keep it away from children and pets and take care with the sap.

On a Balcony or Patio

• Light & wind: Give it the sunniest spot for the best show; its spines suit it to an edge or screen. Pots against warm walls dry fast – check moisture in the heat.
• Practicalities: A stable, free-draining tub; place the spiny growth clear of passers-by.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: Strong drainage holes and no standing-water saucer, to avoid root rot. Terracotta breathes and dries faster, glazed or plastic holds moisture longer.
• Potting mix: A well-aerated, organic mix – peat or coir with perlite (and a little vermiculite) – giving roots both moisture and air.
• Feeding: Potted plants need feeding more often than those in the ground, since watering leaches nutrients from the mix – a balanced feed through the growing season keeps them productive.
• Repotting: Refresh the top of the mix and pot up about every couple of years; on established plants, lightly root- and top-prune to keep them in balance with the pot.

Grower’s Container Tip

• Step-up potting (grower’s method): Either start straight in the final-size container, or better, begin in a pot about 20-30% larger than the root ball and step it up as the roots grow until it reaches the size you want. Use a good potting soil.
• Care: Mainly prune and shape it once a year to keep it neat and productive.

Bloom & Flower Guide

Quick Details

• Bloom Season: Mainly spring to summer, but can flower on and off all year
• Flower Appearance: Fragrant white, five-petalled flowers in small clusters
• Edibility: Not edible — the plant contains toxic milky latex, and the flowers are ornamental only

Detailed Blooming Overview

Natal plum (Carissa macrocarpa) is grown as much for its flowers as its fruit. The white, five-petalled, star-shaped blooms are sweetly fragrant and appear mainly from spring into summer, though in mild climates the shrub can flower nearly year-round, often carrying flowers and fruit at the same time.

Flower Characteristics

• Fragrant white flowers with five petals, held in small clusters.
• Star-like form with a jasmine-like scent, attractive on hedges and ground cover plantings.

Bloom Care & Thinning

• Pollination: Visited and pollinated by bees.
• Safety: The plant’s milky latex is toxic — only the fully ripe fruit is edible; keep flowers, leaves and stems out of the mouth.