Iresine diffusa f. herbstii 'Rich Goldstar'

Natural origin and background

Bloodleaf plants formerly known as Iresine herbstii are now classified as Iresine diffusa f. herbstii. The form is native to northern Peru and belongs to wet-tropical vegetation. Its parent species, Iresine diffusa, has a much broader range through tropical and subtropical America, including seasonally dry habitats.

‘Rich Goldstar’ is a cultivated selection with dark glossy leaf fields, a broad yellow-gold vein network and pink-red stems. These gold and red accents distinguish it from other bloodleaf selections.

Care for compact golden Iresine growth

• First days: Let Iresine ‘Rich Goldstar’ settle in warmth before exposing it to stronger sun or cutting it back. Soft greenhouse-grown leaves are easily marked by a sudden change.
• Light: Give the plant very bright filtered light with optional gentle direct sun. Shade increases the gaps between leaves and produces greener, less compact shoots.
• Water: Water once the top layer is no longer evenly damp, soaking the root ball and draining it fully. Avoid repeated severe wilting as well as cool, constantly wet substrate.
• Substrate and warmth: Use a fertile, aerated mixture with dependable drainage. Growth is fastest in warm conditions and slows sharply when temperatures fall.
• Humidity: Ordinary moderate humidity is usually sufficient when watering is even. Very dry heated air can dry the leaf edges and weaken new shoots.
• Feeding: During active growth, feed lightly with a complete fertiliser. Too much nitrogen produces weak, stretched shoots and can reduce the clarity of the gold-pink vein pattern.
• Pruning: Pinch or shorten shoots above a node to stimulate side branches. Leggy older plants can be renewed from stem cuttings kept warm while they root.

Signs of trouble

• Gold pattern becoming greener: Low light, excess nitrogen and normal leaf ageing can all weaken the contrast. Increase filtered brightness and use lighter feeding, then judge the next leaves against ‘Rich Goldstar’s established gold-and-pink pattern.
• Long shoots with bare gaps: Shade and lack of pruning produce stretched growth. Cut healthy stems just above nodes so new, better-lit branches replace the sparse tips; old bare sections do not fill in by themselves.
• Dry brown margins: Check for repeated drought and accumulated salts. Water evenly, drain fully and flush only when the roots remain firm and the mix drains freely.
• Veins or abnormal mottling: The bright gold and pink vein network is normal. New irregular mottling combined with distorted leaves, dead patches or weakening growth should be isolated and investigated rather than treated as ordinary colour variation.
• Mites and other sap feeders: Fine dull stippling suggests spider mites; cottony masses, whiteflies or aphid clusters may occur on soft growth. Isolate, identify the pest and use a suitable labelled control.

Iresine diffusa f. herbstii ‘Rich Goldstar’ is non-toxic to cats and dogs

• This plant is non-toxic to cats and dogs.
• Its effects on people are unclear, so keep it away from young children who may chew it.
• Eating a large amount can still cause an upset stomach. Seek medical or veterinary advice if symptoms continue.

What does Iresine diffusa mean, and who first published it?

Iresine comes from Greek erion, meaning wool, referring to hairs on the flowers or developing fruits. The Latin epithet diffusa means spreading.

Patrick Browne established the genus Iresine in 1756 in The Civil and Natural History of Jamaica, page 358.

Carl Ludwig Willdenow first described Iresine diffusa in 1806 in Species Plantarum, fourth edition, volume 4, page 765; Friedrich Wilhelm Heinrich Alexander von Humboldt and Aimé Jacques Alexandre Bonpland had proposed the name.