Answer: Liriope can be trimmed back to remove the tattered foliage. This helps it look nicer while you are waiting for the new foliage to grow in. Be careful not to damage the new foliage coming in when you trim. You can use hand pruners or even a lawn mower set very high if you have a large area. If there is bare ground between the plants you can topdress with a good quality compost and use a few inches of organic mulch to keep down weeds and help feed the soil over time as it breaks down. You can also use a general purpose complete granular or slow release fertilizer with an analysis of 10-10-10 or similar proportions. Read and follow the label instructions.
Coral bells or heuchera are treated similarly with compost and fertilizer and mulch. Trim away any winter damaged foliage, again be careful not to damage the new growth. These plants usually need to be divided every few years to help keep them vigorous and this can be done in very early spring.
Enjoy your plants!
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