Seed Germination Fundamentals

Germination in a botanical context classifies the "process of germinating a seed." But! That's not saying much so let's phrase this in a different way. Germination is the start of vegetation or fresh growth in a seed or plant. Another common term used instead of germination is "sprout."

To sprout a seed is to germinate a seed. Germination is not just limited to plants' seeds. Growth of a hypha from a fungal spore is also considered germination. Once the seed cracks open and that little white tip emerges, the germination process is considered completed.


Understanding Seed Germination

Plant's produce seeds to reproduce and continue their species. Under ideal conditions, the seeds will "germinate" to start their life outside the shell. Like new born babies with soft skull and a delicate skeleton, fresh sprouts will be very delicate and can be easily damaged.

The shape, size and thickness of a seed depends on its species. However, all seeds have an embryo inside that wait for the right time to begin germinating. When the stem of the embryo or the radicle appears, that usually signal the end of the germination phase. The radicle is the white tip that is the first sign of successful germination. The sprout will then enter the "establishment period," a phase that ends once the seedling has used up the stored nutrients in its reserves. Because seeds germinate with a food reserve, they generally do not need any supplemental nutrients for approximately the first week or two.


Seed Mortality

In nature, a lot of plants will produce huge amounts of seeds to ensure success in the survival of their species. A great number of seeds will not make it through the two critical phases of their life -- the Germination and Establishment phase.

Seed mortality may occur for various reasons. The temperature can affect seed germination rates and success. Some seeds may require heat while others may benefit more from being soaked in water for a period of time. Please research your plant type to learn more about it's specific germination requirements.

source : hydroponicsearch