Читать книгу The Cannabis Grow Bible - Greg Green - Страница 55

PLANT TYPES

Sativa

Ruderalis

Indica

Germination in the initial stages as the plumule (seedling root) pushes through the seed shell.

The seed shell is still attached to the cotyledon (first seedling leaf). Photo Paradise Seeds.

Germination is the initial stage of growth and occurs when the seed’s embryo breaks through the shell, the testa, and the seedling produces its first initial root, the plumule. This root fixes itself into the germination medium and pushes the newborn seedling up and over the surface. Following surface contact, two embryonic leaves, the cotyledons, open outward to receive sunlight, pushing the empty testa away from the seedling. It takes anywhere between 12 hours and 3 weeks for seeds to germinate.

Sometimes the shell can be removed by hand if it appears to be obstructing the seedling’s growth. In nature the wind helps to shake the seed shell away. Since artificial wind is not initially used in the germination environment, some seedlings find it harder to shed their shell, although most do not have a problem doing so. Care should be taken not to damage the seedling when removing the shell.