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Caladium is a herbaceous plant with deciduous leaves and spring and summer development; develops a fleshy rhizome, from which, in spring, long cylindrical petioles develop, bearing large heart-shaped leaves; this plant comes from South America, and was imported into Europe already in the nineteenth century; during the decades of cultivation the breeders have given life to cultivars and hybrids of various colors; typically the foliage of the caladium it has a green margin, while the page of the leaf is white, from red to pure white, often with veins marked by very contrasting colors with the base color of the entire leaf. Each rhizome develops large clumps of leaves, which can rise up to 50-60 cm.
The origin of caladium is tropical, therefore during the vegetative period it prefers temperatures close to 15-20 ° C; however the development of this plant takes place mainly during the warm season: therefore at the beginning of the spring we can place the rhizome in a container full of good rich and soft soil; but as soon as the foliage is well developed and the external temperatures start to rise, we can decide to keep this plant in a pot in the apartment, or to move it to the ground in the garden, where it will stay until autumn, enjoying a less dry climate than the one present in case, and much better ventilated.In any case, we will position our plant in a partially shaded place, to better remember the rain forests from which it comes; we avoid the direct sun as much as possible, but we also avoid placing the plants in a very dark or dark place. Generally the caladium grown in the dark tend to have dull colored foliage, losing their peculiar characteristic.Caladio - Caladium: Watering
Since the rhizome begins to sprout, until the foliage shows a significant yellowing, the waterings will be regular and abundant, always waiting for the soil around the rhizomes to dry before supplying water; every 12-15 days we add a good universal fertilizer, rich in microelements, to the water for watering.
When the cold of autumn is felt caladio it begins to wither, at this moment we suspend the watering, to allow the rhizome to enter vegetative rest. The forced cultivation of caladium, which is practiced continue to water it even in autumn and placing it in a warm place, with the passage of time tends to impoverish the rhizome, with the consequence of the total death of the plant, or a lesser capacity to survive problems such as root rot or insects.