Thank you for your question regarding uncovering your perennials. With the early warning temperatures we have moved into a time when you can begin removing mulch off of your plants. Do so gently so you do not damage any new growth that may be coming. While it is okay to uncover your plants it is still to early to rake or do amy work on your lawn. Below is a link to an article on uncovering perennials in the spring from the University of Minnesota. http://www.extension.umn.edu/garden/yard%2Dgarden/flowers/perennials-uncovering-in-spring/