Lori your trees all look healthy. Looks like a few seedlings in there...? Nice job!
The purple/plum or burgundy color is normal and some express it more than others. It usually is an indication of vigorous growth. The inflo stalk will usually be a dark plum color too for some types; it can also be bright green, yellow or even red!
I wouldn't change a thing; you are doing everything right by the looks of your patch...post pics of your inflo when it pops!
-s
Q