Roridula - Carnivorous plant
Roridula are carnivorous plants that capture their prey by means ofVISCOUS SECRETIONS that bog down the prey. In some of them the secretion is constant while in others it occurs only in the presence of the prey.
The roridula belongs to the Roridulaceae family and is the only genus present in this family and are native to the poor soils of south-east Africa located in areas characterized by hot and dry summers and cold and very rainy winters.
There are only two species: the Roridula dentata which becomes a very imposing and branched bush and the Roridula gorgonias which, on the other hand, remains smaller and less branched.
It is considered a semi-carnivorous plant because it does not digest its prey but absorbs its excrements.
They have leaves with hairs that sew up very sticky resinous substances that look like real "quick-setting" glues that remain active for a long time, even when the leaves are now dry.
Rodidula cannot be considered real carnivorous plants as they do not have the ability to digest the prey they capture. In fact, it is thanks to a mutualistic symbiosis with the "assassin bugs" ("assassin insects" of the Reduvidi family) that feed on the insects captured by the plant and then the roridula feeds on the excrements of these insects which have a high content of nitrogen.
Cultivation of this plant is not easy considering its places of origin. In fact, home cultivation is problematic. Even more so in the greenhouse as they require high temperatures and a fairly dry environment, which is not easy to reproduce.
It is in fact a plant that grows all year round although, considering that in its places of origin growth occurs during the rainy period, it obviously maintains this characteristics and growth is more active during the spring period. There flowering occurs from mid-winter to early spring.
Whereas they are plants that live in land sandy, the cultivation substrate can be made up of 60% of fine sand and the rest of peat. They like direct sun and low ambient humidity; this means that the air circulation must be excellent to ensure the dry environment they need.
Now for fertilizations of the roridula it is not necessary that we go hunting for insects to provide the plant with its nourishment. We assume that in nature the plant adopts these strategies as it has no other nourishment available. Being entrusted to our care, we will provide it with the chemical elements necessary for its growth. In any case, we keep in mind that the plant does not like fertilizations so you must use very low concentrations (1/4 of the doses indicated in the package) and use fertilizers that have a high nitrogen content and very low in the other elements.
Temperatures cultivation must not drop below 5 ° C and the soil must always be kept moderately humid and water that is very poor in mineral elements (rain or distilled water) is used.
For the repotting roridula are plants that need to be grown in large pots and with a lot of soil available as they grow quite quickly. If we need to change the pot, it must be done with great care as the roots are very thin and fragile.
As far as the multiplication of the roridula can take place either by seed or by cutting. Multiplication by cuttings is very difficult to do as it is difficult to find the right degree of humidity to prevent the cuttings from rotting. Comparatively simpler is multiplication by seed. The roridula are self-pollinating so either we leave it to mother nature or we scratch the anther and sprinkle the pollen collected on the pistil. Once pollinated, capsules will form which take several months to open and contain only three seeds.