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Elodea densa is a perennial stoloniferous aquatic plant native to Central and South America. The first species were discovered in Argentina. The plant is characterized by thin and fleshy, flexible stems, up to 4-5 meters long, which stretch from the bottom to the surface. If grown in the aquarium, the elodea it can reach a maximum of one meter in length. Its development will depend on the amount of light available to the plant. Along the stems grow numerous sessile leaves, slightly rolled, elongated and dark green in color. Between June and July it produces small white flowers, followed by small fleshy capsules that contain the seeds. It is worth noting that if cultivated in the aquarium, the plant rarely blooms while if cultivated in outdoor environments such as ponds, flowering will be more vigorous and will come from July to September.
To be able to develop at its best this plant needs to be sunk on the bottom of quiet lakes located in rather bright places; does not like the excessive shadow that can lead to the weakening of the plant and in the most serious cases even to the death of the same. If allowed to float on the surface of the water without being buried, excessive insolation could cause the leaves to burn and the entire plant to die. It is a species that does not fear the cold and can withstand temperatures close to zero for short periods.
As for the soil, the stolons are sunk into a substrate rich in organic material and sand; the elodea dense they develop without problems in slightly alkaline water and definitely rich in limestone, while they die in acid pH waters.
It is very easy to propagate these plants by dividing the tufts of stolons, the new plants thus produced should be immediately placed at home on the bottom of a pond or pond; these plants are often used as a flora for aquariums, in this case they are often pruned (even if they are kept medium-sized) to guarantee simple circulation to the fish and to prevent the plant from getting the upper hand over the entire container.
In the summer period, ie the months of the year in which the plant tends to multiply out of proportion, the plant can be considered a "dangerous" species for small boats that circulate in not too deep lakes. In fact, the elodea densa, developing rather long ramifications is considered a weed. In this case, regular pruning is provided to avoid the problem and allow the normal circulation of boats.
During the vegetative season of the plant it is possible to use specific liquid fertilizer for green plants to ensure a good development of dense elodea.
Dense elodea: Pests and diseases
Usually these plants are not attacked by pests. Being aquatic plants they are not particularly subject even to the development of diseases and are quite resistant. In order to allow them healthy growth and avoid the possible attack of pests and diseases, it is necessary to guarantee them optimal conditions of brightness and humidity. It is also important not to completely submerge the foliage. The health of the plant could be compromised.