Step 1: Methods to increase vase life of flowers.
To increase the vase life of flowers, different methods are used to reduce water loss, prevent wilting, and enhance overall freshness.
Step 2: Analyzing each option.
(A) Hardening: Correct. Hardening is a method where plants are acclimatized to the surrounding environment to extend their vase life.
(B) Pulsing: Correct. Pulsing involves treating flowers with specific solutions to prolong their shelf life.
(C) Conditioning: Correct. Conditioning is the process of preparing flowers by cutting stems and placing them in water to improve longevity.
(D) All above: Correct. All of the mentioned methods (hardening, pulsing, conditioning) help in increasing the vase life of flowers.
Step 3: Conclusion.
All the methods mentioned are effective in increasing the vase life of flowers.
Final Answer:} All above.