We planted 4 perennial clover plots last fall, 3 of the 4 have done well. What I have learned so far is it's all about the soil. PH was good in all, better in some. The clay/clay loam fields did best. The field that was sandy/loam didn't do well at all, the only spot in that field that survived was in the shade of a big oak tree. 2 of the fields still have blooming Durana clover. We planted Durana, red clover and wheat.
We did everything following the directions of Dr Craig Harper at U of Tennessee. He is the Durana guru, look him up