Question about cross breeding 4'o clocks?

Spartan Penguin

New member
Well I was thinking about cross breeding flowers because i was bored, but all I know is most of the scientific aspect. So what would i need to start and how to I make sure they don't pollinate themselves because they are hermaphrodite (have both male and female reproductive organs). I was going to cross pink and white, pink and yellow, and yellow and pink.
 
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