The three stages of germination are
Pre-germination. This stage is characterized by a period of dormancy in which the embryo is not ready to germinate. This stage may be extended for up to several months if necessary.
Germination. This is the stage at which the radicle emerges from the seed coat and starts to grow. The radicle is the first sign of germination. The germ tube may or may not emerge at this time.
Post-germination. This is the stage where the radicle has emerged and the growing embryo develops into a seedling. This stage may last for weeks, months, years or indefinitely.