Columnea crassifolia prefers luminous positions, but far from the direct rays of the sun; in summer it can be placed outside, in a shady place sheltered from the wind. The columneas fear much the cold, therefore in winter they are to be placed in the house, in a luminous place.
This kind of plants does not stand the low temperatures, in fact, it is good that they do not go under the 15 °C. While the ideal temperature is around 25 °C.
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In the period from March to October water regularly, always trying to keep the soil slightly moist, but not soaked in water, as Columnea crassifolia does not like waterlogging that can cause dangerous root rot. In winter provide water very rarely, every 15-20 days, to prevent the plant from drying out. In the vegetative period provide fertilizer for flowering plants every 15-20 days, mixed with water of watering.
Plants belonging to this variety prefer a loose compound, rich in organic matter and very well drained. Use good, balanced soil mixed with sand and coarse-grained material, such as perlite or expanded clay, which are perfect for ensuring the right degree of drainage.
Columneas are often grown in hanging containers.
Repotting should be done in spring when the container is too small for the size reached by the plant.
The reproduction to get new specimens of this type takes place by seed, at the end of winter, the seedbed should be kept in a warm and bright place, with a constant temperature, taking care to keep the soil moist but not soggy. When the shoots have acquired strength, they can be transplanted.
In spring, cuttings can be made, using the particularly developed shoots to be arranged in a compound with sand and peat. The container should be placed in a warm and sheltered place until the new shoots develop.
Columnea crassifolia: Parasites and diseases
Columnea crassifolia fears the attack of aphids, cochineal and white fly. On the market there are special insecticide products that can be used successfully to solve the problem; if the attack of the cochineal is contained, you can also intervene manually to eliminate pests by means of a cotton ball with alcohol.
If watered excessively and poorly fertilized, it can be affected by grey mould, root rot and ferric chlorosis. If you notice the presence of mold, you must remove the damaged parts promptly and use a specific fungicide product.