One of my little flytraps have been growing good until about an hour ago I noticed that in the middle of one of the stems is turning black but the tip is still green as well as the base. and the other stems are still green as well.
Humidity is 95%
Light is 6500 lumens 1ft up 6500K (Flourescent)
Temp is 96deg. F.(day) 84deg. F.( night)