Ayurvedic classics have many effective herbs to be evaluated for its identity. In order to have a perfect understanding of the plants it is therefore most essential to be well familiar with the branch of Ayurvedic pharmacology i.e., “Dravyagunavigyana”. In the Dravyaguna vigyana they have mentioned the collection system of parts of plants with specific procedure and in specific seasons. Proper collection practices are required for good therapeutic action of the drug. Acharya Charaka, Sushruta and Sharanghdhara have mentioned different collection processes according to the part of the plant. Demand of Ayurvedic drug increases globally, to achieve this goal one should follow good collection practices of these drugs. The importance of these Dravya in both the conditions as drug collection and drug administration could not be neglected. Kala plays very important role in cause of disease, prevention of disease and treatment of disease. Acharya Sarangdhara also explained the relationship between the collection of raw drugs in a specific season and for specific therapeutic effect depending upon their respective pharmacological properties.