Do not use flower food for woody stemmed cutflowers e.g. King Protea As it decreases their vase life. Wood stemmed cutflowers do best in rain or filtered water. Woody Stemmed cutflowers are all female which means slip on the heels Blossoms.
Experiments have done and the results are outstanding. Dropping an aspirin or one penny into a vase of water has merit, however its a quick fix and the following day it is recommended to use flower food. Flower food gives