The natural overcoming of seed dormancy are :
- Weakening of tough and impermeable seed coats by microbial action.
- Rupturing or weakening of seed coats by mechanical abrasions.
- Action of digestive enzymes present in alimentary canals of birds and other animals which happen to feed on their fruits.
- Leaching of inhibitors present in the seed coat.
- Inactivation or oxidation of inhibitors by heat, cold and light.
- Production of growth hormones which can counteract the effect of inhibitors