Plant is starting to sprout noticed this past week plant is limp. The grate in the picture is to keep the wily squirrels from digging up the plant.
Brown tips usually means a watering issue - too much or too little. Does the soil drain well? It should be somewhat sandy or loamy and very well draining. You can improve the drainage by adding compost. Here is more:
https://www.gardeningknowhow.com/ornamental/flowers/liatris/container-grown-liatris-plants.htm