After a seed has been produced, it often has a time during which no growth occurs

Seed Dormancy

Explanation:

In the last stages of seed maturation, the seed dehydrates and the embryo, which is surrounded by a food supply enters dormancy, that it stops growing and its metabolism nearly ceases. The embryo and it's food supply are enclosed by a hard protective seed coat formed from the integument of the ovule.

Dormancy is a condition of extremely low metabolic rate and suspension of growth and development.

Some seeds species as soon as they are in suitable environment. Others remain dormant, even if sown in a favorable place until an environmental cue causes them to break dormancy.

this is math not biology xd