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To this particular genus belong about two hundred species of perennial, evergreen aquatic plants, widespread in the wetlands of the entire globe; only 10-15 species are cultivated as ornamental plants. They have erect, thin stems, up to 100-150 cm tall, with thin leaves, generally placed at the base of the stems; stems and leaves are dark green, sometimes variegated with yellow, as in S. zebrinus. From the spring to the summer at the apex of the stems they produce some arcuate and branched spikes, constituted by small flowers of a brown color; then the flowers follow the fruits: achenes, which are spread by the watercourses when ripe.
The syrup plant should be placed in a very bright and sunny place; excessive shade causes poor plant growth, and sometimes the absence of inflorescences. They do not fear the cold. For optimal cultivation, the temperatures must be between 16 and 24 ° C. To make the plant grow and grow during the whole year, place it in a place with a temperature not lower than 13 ° C. In this way it will not enter in vegetative rest and this will allow the continuous growth of our syrup. When the temperature is below 7 °, it is preferable to move it to warmer areas to avoid fatal damage to the plant.
The scirpus grow with the roots sunk in submerged lands, near the banks of rivers and lakes; they prefer rich and not excessively acid soils; the acidity of the soil and the salinity of the stretches of water can compromise the development of the plant. If you want to grow these potted plants it is good to know that the size of this should not exceed 12 cm in diameter. This is because the plant, thanks to its capacity for renewal and its rapid development, does not need more extensive dimensions.
The multiplication of the syrup plant takes place by seed, at the end of winter; It is also possible to divide the tufts by taking already rooted stems, which must be immediately placed at home. One of the most used reproduction techniques is division multiplication. Let's see what it is.
Over time, the plant tends to lose its original beauty, especially the central part of the syrup is the one that suffers the most. For this reason, every year during the spring season it is advisable to discard the central part of the scirpus and keep only the external part. To ensure that the reproduction takes place in the best way, the external part must have at least 20 leaves. Once the damaged part is discarded, place the chosen portions in a jar with three more to get a lush vase.
Scirpo - Scirpus: Pests and diseases
In general, scirpus plants are not particularly prone to pest attack and disease development if cultivated and cared for well. Aphids can, however, completely cover the inflorescences. Furthermore, an area that is particularly bright and affected by the rays of the sun could be a place that is not suitable for our plant as the sun's rays would dry up the leaves causing diseases.