when to trim ornamental grasses
we have karl foerster, giant miscanthus, and red-silver maiden grass. should these be trimmed, and if so, what time of year? we've tried trimming the red-silver to about 6" in early spring, but they did not come back that well afterwards. the others, we've just removed dead stuff from the previous year in the fall. that seems to have worked a little better. neither of these is likely the best way to do this, so we're asking for expert advise. full sun to mostly sun exposure, soil is very clay. after killing some beautiful grasses, we've learned to water seldom, if at all.