Hi from Texas! I'm a first time avocado grower working on 4 seeds at the moment and have 2 questions for the fastest growing ones:

First being that both of them have multiple "stalks", like the one pictured below, when most of the pictures I see online only have one - does this mean they need trimming or is it normal depending on avocado type?

Second, one of the seeds that has multiple stalks now has a main one reaching over 7 inches (picture below) and I keep reading that it should be cut back to 3 inches, but I don't want to damage it - is this a myth, personal preference, or a necessity?

Any advice would be greatly appreciated!