I've had my Dracaena Janet Craig for the past 3 months and it doesn't seem to be growing at all. On the contrary, I think I may be over watering it or not giving it sufficient/giving it too much light because I keep getting brown and yellow leaf tips and edges. I saw on YouTube that you can snip those pieces off and it'll be good as new, however that's only the case for a few days. I'm a beginner with plants. How can I ensure my Janet Craig will grow and be healthy? Any soil type advice?