You I'd what grew well in there? When did you plant?
Looked at the mix, while it has some grains, it's has alot of nitrogen fixation plants in it. Your nitrogen could be sky high, while the others are low.
Also, how did you prep for the fall release. any significant tillage. Could be digging up the old seed bed. Maybe plant something to smother the weeds this summer, before going back to clover.
I'd go with a crop or rye, buckwheat, or even some oats. Then rotate to your clover mix, but I like to plant fresh clover plots with some sort of grains. Usually wheat oat mix.
What equipment do you have to work with? I'm guessing from the mower, your towing stuff with an ATV.
Don't be afraid to go out there and dig down a few shovels and see what's going on. Ever had a soil test?
I got a big sedge battle ahead of me over in stillwater. The more I play in one spot, the more it becomes sedge. Not only sedge is a fairly prolific seeder, it has tubers. The seeds can be controlled by mowing. They don't seed all season.
Likely spraying this in all my plots up north.
I still like the idea of rotating clover every 3 years. My big step into putting plots up there was 2020, so 2023, the 1st one is up. I did the 2020 better with spraying gly before planting. But, got the bug and planted the 2021 new plotting area in april without spraying Did spray cleth in there before. That spot has a goldenrod infestation, which may not be all that bad. Mowed it in august 2022, and put rye n clover. Clover is real thick, and fall activity in there is good.