The show's creator Dan Povenmire confirmed that the reason Ferb has green hair and Lawrence doesn't is because it's a gene in the Fletcher family that skips and generation, stating that Reginald Fletcher had green hair when he was younger (Ferb is a only Fletcher family member to have unnatural hair color).
linda
Flynn
It's called I, Brobot
It isn't going to be revealed.
Because they are step-brothers they have different grandmothers. Phineas' is named Betty-Joe Flynn his grandpa is Clyde Flynn. Ferbs' is Winifred Flecter and his grandpa is Reginald Flecter.
linda
To get green hair you have to die it.... :)
If your hair is brown it will be forest green if your hair is blonde it will be light green if your hairis dirty blond it will be regular green
no but you can have green pubic hair
Flynn
Perry the platypus
dave moon
No it is actually their inventions
no it will not turn your hair green
Captain green hair The Jedi Viper! and the joker
The Boy with Green Hair was created in 1948.
It's called I, Brobot