Eucalyptus, Jacaranda or mimosa come from the Australian bush, where devastating fires are common, which seem to destroy all vegetation. Shortly thereafter, however, the seeds lying on the ground begin to germinate: a sign of it, that the heat was a signal to them, to grow and fill in the gaps. Accordingly, heat treatment is also germ-promoting for them when growing indoors. Instead of a fire, scalding with boiling water or a two-hour bath also helps 40 °C.
Seeds of tropical plants (with. B. Palm trees, bananas, coffee), which fall to the ground in a fruit in their homeland and begin to germinate soon after the pulp has rotted, soaked in lukewarm water overnight, to create similar starting conditions. This makes the shell softer, and the seed absorbs water, that it needs for germination. In the case of very hard-shelled seeds, this can also make it easier for moisture to penetrate, that the shell is scored or filed with a sharp knife. It's even easier and safer, rubbing the seeds between two layers of coarse grit sandpaper for so long, until the shell has become permeable. Of course, the seed itself must not be damaged during the procedure.
Seeds from the greengrocer – From a couple of oranges- or lemon seeds, thrown into the flower pot instead of carelessly thrown into the trash can, are little a few weeks later, dark green shiny seedlings. And just like citrus fruits, many exotic fruits also contain viable seeds. For example fresh figs, pomegranate, Lychee, Kiwi, Cherimoya, the rare carom-bola (star fruit) and the khaki fruit. It just depends, thoroughly clean the seeds from the pulp, you (without further preparation) into permeable, Set as sandy soil as possible, to provide and wait for heat and high humidity. The resulting plants are not always able, to develop flowers and fruits again, Orange trees grown from seeds, e.g. B. would have to be refined first. It is best to read up on such useful tips and the most important things about caring for the newly acquired plants, while the seed slowly begins to germinate