Pot height: I recommend 2-4+ inches or taller. Drosera affinis can develop a a long, branching root system. A tall pot will allow this sundew to reach its full potential. I've grown Drosera affinis in a 7-inch tall pot with my D. venusta "Coccicaulis" and D. collinsiae, but I've also growth them in 2" pots with dead LFS where they've done extremely well! (top pic)