Thornless Crown of Thorns

Thornless Crown of Thorns Care

Euphorbia geroldii

What is the plant

Euphorbia geroldii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.

Euphorbia geroldii is endemic to north-east Madagascar, found within the surrounding coastal forest of Iharanae (Iharana), in the Ambilobé region. The area of occupancy is below 1 km². The species is treated by habitat degradation, fire, habitat clearing for charcoal. Also known as Thornless Crown of Thorns, it is a much-branched, unarmed, semi-succulent shrubs to 2 m tall. Giving the right conditions E. geroldii produces a non-Stop show of bright glowing red flowers throughout the year.

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Lighting

Part Sun

Hardiness zone

10a - 12

Difficulty

Hard

How to Care for the Plant

Water
The plant is relatively flexible in its watering requirements. They can be watered regularly as long as the medium is open and well-drained. As with any normal plant when watering, it is best to do so thoroughly, until a little water comes out through the drain holes. Allow the medium to dry out somewhat between waterings. Reduce watering to once every month during winter. Space plants apart to allow air movement between branches and leaves. This will help with evaporation of extra water droplets collected during watering.
Fertilizer
Regular fertilizing with low nitrogen and high phosphorus and potassium ratios are preferred. Feed during spring and summer to mid autumn and withhold feeding during winter.
Sunlight
Outside, the plant likes semi shade, inside, it requires full to part sun.

Disease diagnosis

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Soil
The ideal potting-medium is one with good moisture-retaining capacity but open and well-drained with some extra manure for added nutrition.
Temperature
The plant is very tender and needs protection from frost. The lowest temperatures this plant can survive are between 30°F (-1.1°C) and 50°F (+10°C).
Container
Choose any type of container with enough drainage holes.