Trimming blue fescue

We live in Nanaimo, B.C. and have some Blue Fescue ("Elijah Blue" ) ornamental grass in my garden - my wife calls it "Cousin It"! It is beautiful but I noticed that it tends to go mostly brown in colour as the Summer season goes on. I get the feeling that it might benefit from a mid-season trim to give me more new, blue leaves but cannot find any good information about when and how much this particular grass can/should be trimmed. When and how do I trim this particular ornamental grass to ensure maximum blue colour throuhgout the growing season?

• ornamental grasses,
• trimming fescue,
• ornamental grass,
• grasses,
• blue fescue,
• grass,
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