The three steps of seed germination are as follows:Water imbibation leads to the rupture of seed coat, uniform imbibation is important and optimum temperatures are essential. The imbibition of the seed coat further results in the emergence of the radicle and the plumule that leads to the unfolding of cotyledons.Temperature and photo period play an important role here. The final step is when the cotyledons are expanded which are the true leaves.