Cucumber (Cucumis sativus L.) is a widely cultivated plant, belonging to the family Cucurbitaceae and having a chromosome number, 2n =14. In botanical terms, the cucumber is classified as a pepo, a type of botanical berry with a hard outer rind and no internal divisions. PGR such as GA3, NAA and Ethrel include many aspects of plant growth, development and flowering and yield. They are organic substances when they are used in low concentration to change the plant growth usually by stimulating part of the natural growth regulatory system. Now a day farmers are using PGR on large scale in...