Brain Game: Green Thumbs

But taking into mind that both of them are Brain Game fans, why did they choose those particular crops?

Here's the answer.

ANSWER: Edward Carter is raising watercress and cabbage because both his name and his crops are properly typed on a QWERTY keyboard using only the left hand. By contrast, Johnny Millikin has a garden full of onion and pumpkin for the same reason, but with the right hand.