RE: Cutting Clover Question
Criggster is right it would be helpful if we knew your locale.
Also - Red clover is usually a two year crop at best. Lots of farmers use it as an annual. When I've mixed in red clovers with whites in the past - I did like you - and I managed the first year for the red clover - and cut high. (1 ft approx). The next years after - I managed it as if it were a white clover plot and mowed to 6" (sometimes lower).
Most often now - I don't mix whites and red clover. Last year I did a spring planting of white clover - and mixed in Crimson Clover - I liked that - the Crimson grew faster than the slow growing White clover - and not much taller. We even had some still mixed in early this summer before it faded away.
FH