How to grow roses
Let me be frank from the outset
I know nothing about roses
Further more, I despise gardening
But..
If we start from the premise that to pre suppose only a gardener could grow as rose 
Then by the same token
Only a musician could make music. 
A fact overthrown by a child's laugh.
And only a bath maker could run a bath then only u could put a smile on the mouth of a river.