The plants of Nematanthus gregarius prefer very luminous locations, but far from the direct rays of the sun; in summer it is possible to place them in open air, but during the cold months it is good to cultivate them in an apartment, with minimum temperatures over the 10-12°C as, being a plant of tropical origin, it does not bear the low temperatures which would bring the plant of goldfish to the rapid death.
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The plants of the Nematanthus gregarius or goldfish need to be watered quite regularly, from March to October, letting the substratum dry between one watering and the other; they can bear short periods of drought and fear water stagnations, therefore it is advisable to water a little less rather than keep the soil soaked in water for long. During the cold months let’s water only sporadically. From March to September, add fertilizer for flowering plains to the water every 15-20 days.
The specimens of this particular variety of plant with flowers that look like goldfish prefer soft and light soils, very well drained.
Usually they should be repotted every 2-3 years, in autumn, choosing a new container slightly bigger than the previous one, in order to allow the roots to have the necessary space to develop without problems.
It is essential to check that the soil in which these plants are planted has a good drainage, to avoid the formation of water stagnations that are not tolerated by the Nematanthus gregarius.
The multiplication of plants of this type takes place by cutting, in spring or autumn.
The cuttings must be placed in special containers in which soil mixed with peat and sand has been placed, in order to have a good draining power. It is necessary to place the containers in a sheltered and protected place with a temperature of around 20 °C. The soil should be kept moist but not soaked. When the cuttings present the new shoots, they can be transplanted in different pots, where they can continue to grow.
Goldfish – Nematanthus gregarius: Parasites and diseases
In general, these plants are quite resistant and are not attacked by pests or diseases; excessive watering can, however, promote the development of root rot. It is essential to make sure that the soil does not hold the water too long and avoid exceeding it with watering.