Hi there! I live in USDA Zone 5b. We pulled in our garden boxes of Karl Foerster Reed Grass into the (uninsulated) garage over the winter, not expecting much. Surprisingly we started seeing green shoots in March. Brought them outside last Friday thinking it was warm enough and they really needed to start getting sunlight, but they died overnight! Did we shock the plants by not acclimating them more slowly? It's been a week and I'm not seeing any more green shoots. Any chance of these coming back, or is it time to dig them up and start over?