This is my first attempt at cultivation. These ladies are sittin in happy frog organic soil. Have been watering with neutral ph with general hydroponic rapid rooter root enhancer. Under 400 watt mh light 24/7 about 16 inches away. Temps stay steady at 84 degrees with 40 % rh. Started with half strength dyno-gro liquid grow yesterday... On two of them there are pin size holes in blade. All four have slight discoloration in tips. What's up!? Any help appreciated!