[stevehollx]

That 5% (by weight) ryegrass often makes a huge difference in durability and repair ease versus just TTTF/KBG, believe it or not, due to fast germination and its density. The only reason to omit one species is for looks instead of durability (if uniformity is more critical).

That is kind of like the approach for sports fields, where they just keep overseeing rye heavily around the high traffic areas like the soccer goals all year long. Germinates fast, and gives coverage for at least long enough.