Chill : Purple Bud X Tropicana Poison

hello Guys, this my second grow : ) I was wanted to plant very colorful plants that why I take a "red" and "purple" one. I am super curious to see what we will have at the end. No for the moment, I just start to give the two nutriments. Just a little problem with the Tropicana. She starts growing with two little with point on the extremity of her two leaf. It looks to disappear with time.. So if you guys have some advices for me, I'll take it with pleasure.