Hi! This is the first time I have posted to this group, so I wanted to thank everyone on here for their posts. My problem: I ordered a Thai pepper plant, and 2 Carribean Red habanero pepper plants, from an on-line supplier. I planted them in a pot with a jalapeno plant that I purchased locally. The jalapeno plant is doing well, but some of the leaves of the 3 other plants are turning black and falling off. I pulled up one of the habanero plants, because so many leaves had turned black. My questions: What might this be? Will it harm the jalapeno plant (since it's in the same pot)? And, if so, should I pull up all of the plants with the black leaves? Thanks in advance for your help. Jeff