[WIDucksBucks]

Spray it now and spray it again with round up or other glyphosate type contact herbicide .... disk it lightly ... let the weeds come again and spray a week prior planting ... broadcast and lightly drag.

Some might say over kill but when breaking out new plots or trying to rid yourself of cool season grass like reed canary to need to be aggressive. Also if you have reed canary it is probably site on wetter end of spectrum so late summer planting probably better.

 

[WIDucksBucks]

Get the clover on ASAP. Given the site you should have moisture to carry the clover through... if you have reed canary in WI you are most likely on a wet site ... as you said edge of swamp.

Mid to north half of state is way behind on heat units ... USDA just extended the cool season grass and legume seeding date to June 15 for “official” projects ... put some oats with it if I were you.

Red clover handles widest range of soil ph but ladino is my main go to for plots.