REPRODUCTION OF PLANTS BY SEED
Reproduction of plants by seed is a sexual (or gamic) multiplication because it occurs thanks to the union of two cells, one male (pollen) and one female (ovum). This fact implies that the new individual that will be born will not be the same as the mother plant since, when genetic variability takes over, the genes will be recombined and the new plant will be similar to the mother plant but not identical.
Let's see how to make it:
When to sow
The period in which to sow is typical for each species, therefore it is always advisable to consult the technical data sheet of the individual plants (even if most of the time it coincides with the beginning of spring).
Where to sow
Where to sow is the second thing to establish. The best solution is certainly to adopt an electrically heated sowing box that can be found on the market at fairly low prices.
However, if you do not want to spend money, it is possible to adopt equally effective alternative home solutions. For example you can use a pot (in the case of a few seeds) or a plastic tray or the common plastic cups, both wider than deep and filled with a soil for seeds (it can be found ready in nurseries) or with peat and sand. in equal parts that is leveled with a flat piece of wood in order to eliminate any depressions and have a perfectly horizontal surface.
How to settle the seeds in the soil
How to place the seeds in the ground is always indicated in the seed packet, however it is advisable to plant them in regular rows. The larger ones interrupt one by one, at intervals of about 1.5 cm between and along the rows and at a variable depth, according to the specifications of the species, but in any case never too deep. uniformly, it is necessary to mix them with sand and to bury them, pass over a flat piece of wood or sprinkle a thin layer of soil on the surface (for this purpose you can use a normal kitchen strainer) equal to about their diameter.
Once sown, it is essential that the soil always remains moist. For this purpose, it is advisable to use a sprayer or a nebulizer that allows you to obtain a more uniform distribution of the water, without moving the ground.
If the sowing has been done in a tray or in a pot, they must be covered with a glass plate or with transparent plastic that must adhere well to the sides of the container in order to avoid both heat and humidity loss.
At this point the various containers that contain the seeds must be placed in an area with an average temperature of about 18-20 ° C (variable from species to species and always indicated in the technical data sheet of each plant).
Every day the glass or plastic must be removed to check the humidity of the soil (and if necessary, intervene if it has dried too much) and to remove the condensation that may have formed on the plastic or glass (the same thing if it is the multiplication box. ).
During this period (the germination time varies from species to species) it is advisable for the seeds to stay in the dark, which can be easily obtained by placing a simple sheet of newspaper on top of the plastic or on the glass.
After the seeds have germinated
Once the seeds begin to germinate, the plastic (or glass) is removed permanently and the seedlings are moved in good light (but not in direct sunlight), taking care to eliminate the weaker specimens to make room for the more vigorous ones.
Once the young seedlings are large enough, take a perune, using a fork that will slip under the earthen bread, being careful not to break any roots and not to touch the seedlings with your hands so as not to risk damaging them because there is still a lot to keep. The young plants will then settle down in the ground or in a pot of maximum 7-8 cm in diameter using the soil indicated for adult plants and as such they are treated.