I was wondering if anyone can tell me what is wrong with my spiderwort plant. Every year it starts off healthy, with lots of pretty blue flowers, but by July the plant is lying on the ground looking sickly. I've tried giving it more water, less water, staking it, feeding it, etc, but usally end up cutting it back to the ground as it looks so ugly. My mom had it in her garden without these issues. It is in sun but not full, all day. Thanks for any help.