I bought 2 Pentas for my railing planters 2 weeks ago. they are in my planter box with English ivy and Vincas. All of these were bought together along with planter soil from home depot. ivy and vincas are thriving but Pentas have wilted. the leaves have turned brown from the edges in and plants have drooped. I water the soil every morning after checking if its not too dry and also spray the plants with water to moisten them. the soil is not too dry nor is it soggy wet and they get full 6 hours morning sun as the house faces east and afternoon sun in filtered through trees.