Guidelines about gardening are:

A.Always pick flowers in the early morning or in the evening
B.Always carry cut flowers heads down to ensure their freshness for a longer period
C.If you have freshly picked flowers and want them to be preserved for a longer period plunge them in a bucket or sink of water right upto their heads
D.The flowers will remain fresh for a longer period of if you put their stems embedded inside a potato frustum
E.All of the above