How to Grow Gazania (Treasure Flower)

To grow gazania (Gazania rigens), the treasure flower, plant it in the hottest, sunniest, driest spot you have — this South African daisy thrives exactly where pampered annuals fail. Give it full sun, fast-draining or even sandy soil, and only occasional water once established, and it rewards you with big, satiny, daisy-like blooms in fiery orange, gold, yellow, bronze, pink, and white, many of them striped or zoned with a contrasting dark ring at the center. The flowers have one famous quirk: they open in bright sun and close in shade, on cloudy days, and at night, so you see the full show only when the sun is out. Low and spreading at 6 to 12 inches tall, gazania is built for hot borders, slopes, edging, gravel gardens, and containers, and it shrugs off heat, drought, salt, and poor soil that would melt most bedding plants. This guide covers seed and transplant starting, the lean conditions it prefers, deadheading, container culture, overwintering, and the few problems to watch.

Meet the Treasure Flower

Gazania is a low, mat-forming daisy from the dry grasslands and coast of southern Africa, which tells you everything about how to treat it: full sun, heat, and lean, fast-draining soil. The plant forms a clump of narrow leaves, often silvery-gray and felted underneath, topped by solitary daisy flowers 3 to 4 inches across on short stems. The blooms are the treasure — broad, glossy ray petals in saturated oranges, yellows, golds, bronzes, reds, pinks, and creams, frequently striped lengthwise or marked with a dark “eye” zone around the center disk.

The flowers are heliotropic and photosensitive: they open wide in direct sun and fold shut in shade, under clouds, and overnight. That habit is normal, not a sign of trouble, but it does mean gazania looks dull on gray days and needs a genuinely sunny site to perform. Modern series like ‘Kiss’, ‘Daybreak’, and ‘New Day’ are bred for earlier, more uniform bloom and some hold their flowers open a little longer in dim light. Low and spreading, gazania works as edging, a flowering groundcover on a hot bank, a filler in gravel gardens, and a tough container plant. For more sun-and-heat lovers, browse the plants and flowers hub.

Climate, Zones, and Heat Tolerance

In USDA zones 9 through 11, gazania is a tender perennial that lives for years, often spreading into a low mat and reblooming with each warm spell — in frost-free coastal California it can flower nearly year-round. From zone 8 and colder it is grown as a warm-season annual, killed by hard frost and replanted each spring. It has little frost tolerance, so set it out only after your last frost, though it tolerates cool nights better than truly tropical annuals.

Where gazania truly excels is heat. It thrives in full, baking sun and high temperatures, including the reflected heat off pavement, walls, and gravel that bakes other plants. It is also notably salt-tolerant, making it a star of seaside gardens, and drought-tolerant once established thanks to its deep, water-thrifty roots. The flip side: it dislikes cool, damp, humid summers, where it tends to rot or bloom poorly. If you garden somewhere hot and dry and struggle to keep flowers alive in July, gazania is the plant that wants those conditions.

Starting Gazania from Seed

Gazania grows readily from seed, though it takes a head start to bloom early. Sow indoors 6 to 8 weeks before your last frost. The seeds need darkness to germinate, so sow them about 1/8 inch deep in seed-starting mix and cover lightly — the reverse of light-dependent seeds like ageratum. Keep the tray warm at 65 to 70°F and lightly moist; germination takes 8 to 14 days, sometimes uneven.

Grow seedlings in bright light and avoid overwatering, which young gazania resents — let the surface dry between waterings even at the seedling stage. Harden them off and transplant outdoors after frost once the soil has warmed. In zones 8 and warmer you can direct-sow in late spring onto warm, well-drained soil, thinning seedlings to their final spacing. Seed-grown plants usually bloom about 10 to 12 weeks after sowing. Named hybrid series often perform more uniformly than open-pollinated seed mixes, which is worth knowing if you want a tidy, even planting.

Planting Transplants, Soil, and Spacing

Transplants are the easy route and widely sold in spring. Set them out after the last frost. The single most important thing is drainage: gazania demands fast-draining soil and will rot in heavy, wet ground. Sandy, gritty, lean soils are ideal, and the plant actually prefers them to rich ones — heavy feeding produces floppy, leafy growth and fewer flowers. If your soil is clay, amend generously with grit or plant on a raised mound or slope where water runs off.

Space plants 8 to 12 inches apart; they spread into low clumps that knit together as a flowering groundcover. Plant at the same depth they grew in the pot, firm the soil, and water in once. Skip the rich compost and skip the heavy mulch right against the crowns — a gravel mulch is better than bark here, keeping the crown dry and reflecting heat the plant loves. On a hot, dry bank, gazania makes one of the toughest, most colorful groundcovers available, holding the soil and flowering where little else will.

Sun, Water, and Feeding

Full sun is non-negotiable. Gazania needs at least six, ideally eight or more, hours of direct sun both to grow well and to open its flowers — in shade it stretches, blooms thinly, and the flowers stay shut. Site it in your brightest, hottest spot. Water newly planted gazania regularly for the first few weeks to establish the roots, then cut back sharply. Established plants are genuinely drought-tolerant and prefer to dry out between waterings; in most climates occasional deep watering during prolonged drought is all they need. Overwatering is the fastest way to kill gazania, causing root and crown rot.

Feed sparingly or not at all. Gazania evolved in poor soil and blooms best on a lean diet; a single light application of a balanced fertilizer in spring is plenty, and many gardeners skip feeding entirely in average soil. Too much nitrogen gives you leaves at the expense of flowers. This combination of full sun, sharp drainage, little water, and little food makes gazania one of the lowest-maintenance flowering annuals you can grow — the opposite of a thirsty, hungry plant like ageratum.

Deadheading and Season-Long Bloom

Gazania flowers heavily from late spring through fall, and deadheading keeps it going. As blooms fade, pinch or snip the spent flower stems back to the base of the plant; this prevents seed set and channels energy into new buds. A plant left to set seed slows its flowering, so a weekly pass to remove faded blooms pays off in continuous color. The spent flowers also close up and look untidy, so removing them tidies the planting as well.

If a planting gets tired, leggy, or sparse in midsummer, shear the whole clump back by about a third, water, and let it flush fresh growth and a new round of flowers as cooler, brighter fall weather returns. In hot-summer regions gazania often peaks in spring and fall with a slight midsummer lull, and a midseason shearing helps it bounce back strongly for the autumn show. Because the flowers close at night and in dull weather, plan to enjoy the display during sunny daytime hours and don’t expect open blooms at dusk.

Containers and Overwintering

Gazania is excellent in containers, pots, and window boxes, especially in hot, sunny spots where its drought tolerance is an asset and you won’t be chained to daily watering. Use a free-draining potting mix, ideally cut with extra grit or perlite, in a pot with good drainage holes, and let it dry between waterings — gazania in a pot is far more likely to die from overwatering than under. Its low, spreading habit makes it a fine front-of-pot or edge plant, and the bright flowers carry a sunny patio container through summer.

In zones 9 and warmer, leave plants in place to overwinter and rebloom; a light trim in late winter freshens them. In colder zones, gazania is usually treated as an annual and discarded at frost, but you can overwinter favorites by digging clumps or potting them and keeping them in a bright, cool, frost-free spot with very little water until spring. They are easy to multiply too — established clumps can be divided, or you can take stem cuttings in late summer to carry a prized color through winter. For more container strategy, see the urban gardening hub.

Pests, Diseases, and Troubleshooting

Gazania has few serious pests. In damp conditions it can attract aphids on new growth and the occasional slug or snail; both are easy to control and rarely a major problem in the dry, sunny sites gazania prefers. Far more common are problems from too much moisture: root rot, crown rot, and fungal leaf spots all stem from overwatering, poor drainage, or humid, crowded plantings. Powdery mildew can appear in muggy weather. The fix for nearly all of these is the same — full sun, fast drainage, less water, and good air movement.

If the flowers won’t open, the cause is almost always insufficient sun or dull, cloudy weather — there is no fix except more light, since closing in shade is the plant’s nature. Sparse bloom and floppy, stretched growth likewise point to too little sun or too much nitrogen. Yellowing, mushy crowns mean overwatering or bad drainage; lift and replant in grittier soil, or move to a raised, dry spot. Gazania is non-toxic and safe around pets and children. For another heat-loving annual that handles tough sites, pair it with our guide to growing osteospermum, a close African-daisy relative with the same sun-loving habits.