Plants
Coral Bead Plant
Nertera granadensis · Rubiaceae
The coral bead plant looks as if someone had scattered hundreds of orange beads over a green moss cushion. This small cushion plant is one of the eye-catchers of the autumn range and a popular little gift for the windowsill. It is seasonal decoration rather than a long-term companion — but its berries delight for weeks if it is kept cool and evenly moist.
- Care level
- Medium
- Botanical
- Nertera granadensis
Botanically the coral bead plant is not a moss at all but a member of the madder family, making it a relative of coffee and sweet woodruff. The inconspicuous greenish flowers in early summer are easy to miss — the real show is the pea-sized, glossy berries that cling to the cushion from late summer well into winter.
In the trade Nertera is sold almost exclusively in full berry. When buying we look for plump, evenly coloured berries with fresh green foliage showing through underneath. Shrivelled berries or yellowish leaves reveal that the plant has been kept too warm or too dry.
The most important point of care is temperature: the coral bead plant comes from cool mountain regions and prefers 10 to 18 degrees in our homes. In a warm living room right above a radiator it drops its berries quickly — a cool bedroom windowsill, stairwell or conservatory are better spots.
Water evenly, ideally from below via the saucer, so the dense cushion stays dry. The root ball must never dry out completely, but should not sit in water either. High humidity is an added bonus for the plant.
The ambitious can grow Nertera as a perennial: overwinter it cool at around 10 degrees after the berry season, feed sparingly in spring and give it an airy, semi-shaded spot in summer, ideally outdoors. Only if the early-summer flowers are pollinated — outside, insects take care of that — will the full set of beads return in autumn.
For decoration we like to combine coral bead plants in bowls with heather, small ferns or silver-leaved structural plants. The glowing orange tones suit autumn and Advent floristry beautifully and last surprisingly long in cool arrangements.
Is Coral Bead Plant toxic to children and pets?
- Children
- Mildly irritating
- Cats
- Mildly irritating
- Dogs
- Mildly irritating
The berries are considered mildly toxic to largely harmless, but they are tempting for small children and nibbling pets. Larger quantities can cause stomach upset — keep the plant out of reach.
Typical symptoms: After eating larger amounts: nausea, stomach ache, possibly vomiting or diarrhoea.
In an emergency:call the German poison control centre in Bonn on +49 228 19240 (24/7) — for pets, contact an emergency vet directly. This information does not replace medical or veterinary advice.
Overview: toxic & non-toxic plants for cats, dogs and children
Care
- 01Keep it cool: 10–18 °C is ideal; warm radiator air makes the berries shrivel.
- 02Bright but without direct midday sun — a north or east window works well.
- 03Keep evenly moist and water from below if possible; avoid waterlogging.
- 04High humidity helps, but do not mist the berries directly.
- 05Do not feed during the berry season; it will not prolong the display.
- 06For a second season, overwinter cool after the berries drop and move it outside in summer.
Frequently asked
- Why is my coral bead plant losing its berries?
- Usually it is simply too warm. Above 20 degrees, with dry radiator air, the berries shrivel and drop. A cool, bright spot between 10 and 18 degrees and even moisture keep the berry display going for many weeks.
- Are coral bead plant berries poisonous?
- The berries are considered mildly toxic. A single swallowed berry is usually harmless, but larger amounts can cause stomach upset. Because the colourful beads are very tempting to children and pets, it is best to keep the plant out of reach.
- Can you keep a coral bead plant beyond the season?
- Yes, with a little effort. Overwinter it cool at around 10 degrees after the berry season, water and feed moderately in spring, and move it to a semi-shaded spot outdoors in summer. If insects pollinate the flowers there, it will carry berries again in autumn.
- Is the coral bead plant a true moss?
- No, the name is misleading. Nertera granadensis is a flowering cushion plant from the madder family and thus related to the coffee shrub. The mossy impression comes purely from its tiny, densely packed leaves.