I have four Miscanthus gracillimus grasses (2 each side of garden) spaced well apart. They have thrived gloriously for last 4 years. It is now early June and 2 at one side are growing and other two are showing nothing, could they be dead? Should I give them more time?
Your two Miscanthus sinensis ‘Gracillimus’ or Maidengrass should be showing some signs of growth by now, although if there is a difference in sunlight between the two sides of the garden, and given our cold spring, there may be a difference in timing for the two slower grasses. If you have not cut back the dead areas of the grass, now is the time to do so, to give the plants some good air circulation and sunlight. If there is new growth emerging from the base of the plants, it should begin to be visible.
If it doesn’t look as though there is any growth, and that these two grasses have succumbed over the winter, you may want to consider dividing your two mature specimens on the other side of your garden. Right now is a good time to do this, while growth is just beginning, and before the weather gets too hot. Plants can be divided in the fall, and at any time in the early spring when growth begins to emerge. Here is a website that provides step-by-step directions for dividing Miscanthus: https://homeguides.sfgate.com/divide-miscanthus-28637.html