Cheese on Cheese

Each of these girls are growing more each day, the fim has slowed the most as she reaches 24" tall. Topping this strain a little late has turned out well so far I'm very happy with the way she's looking. But the natural two are beautiful if I say so myself. The largest of the four has purple streaks starting from the bottom stretching up all the stems and the oldest leaves are starting to go crisp at the tips but the new growth and bud sites are healthy. Any info on that would be great thanks.