If the clover and Chicory hasn't germed yet you can still spray Gly. It won't affect the seeds but will kill the weeds. After it germs usually Clethodim is the answer for grasses. Broadleaf weeds will be hard to kill once it is germed. Generic Gly is pretty cheap and there isn't much better. Cleth gets a little pricey but I'm not sure there is many other alternatives.
Also be sure to point out consistent mowing of the clover once established will help weed out the weeds :D
People have reported success using VERY light applications of Gly, but usually only in early spring and on mature stands of clover. I've never tried it as I don't like sprays. Cleth would be the way to go. My guess, at this stage of the growing season, it's going to be best applied with crop oil as well. Broadleafs can be curbed (most of the time) with regular mowings.
As proof mowing helps our one large plot at the Homestead we thought failed in establishing the clover in the Raxx Factor (if remember Monster Raxx's blends right) we planted....after a mowing this spring and some rain the clover has exploded now that the weeds were cut.
I'm with the rest of them. Truely INCREDIBLE what mowing does. I too have thought I lost stands of clover, mowed them in mid June, and have had KILLER, weed free clover plots for 2-3 more years.
Just a little visual "proof" of mowing and its effectiveness in curbing weeds. Early this spring, my fall planted rye/clover became inundated with yellow rocket. A few weeks later, they were outgrowing even the rye. Granted, the rye was being hit hard by my deer so it was stunted a bit. So in late April, I went in an mowed it down. At the same time, I mowed a few stragglers that had moved their way into the other residual brassica strip (you can see that in the following photos): As of last weekend, the rye is growing great, and the frost seeded ladino is coming in, albeit not as nicely as I would like. However, the YR has been choked out pretty well. Here's a shot last weekend (that's buckwheat/rye in the foreground, the fall plot is in the background):
Mowing will work great to kill broadleaf weeds out of the plot, but will do nothing for grass. The grass will just keep growing and spreading, possibly choking out the clover. Clethodim is the active ingredient in Arrow and will work to kill the grass, but not the clover or chickory.
or look into a product called Grass Beater By Bonide. 20$ a pint and has the same exact stuff that Arrest from whitetail institute has (sethoxydim). My clover plot is on its 6th year and I just last weekend sprayed 24 d-b "b" is very important, you get 24-d near the plot the clover will shrival. haha. My method has been frost seed every spring, broadcast some 0-0-60 before my first mowing and once end of summer before a rain. Hit it with a foliar fertilizer a few times and Last year I hit it with the grass beater stuff and that knocked back the grass. I also mow it in strips to keep it attractive instead of mowing it all at one height. I have spot sprayed round up in the past on the bigger weeds with my hand pump sprayer. Never tried the light round up dose though. Heard it was 1oz per gallon of water. But dont quote me on that haha. Some older pictures. Also one picture is a trail I did just by spraying round up a few times and broadcasting clover seed.
Brox, which is generic buctril.... Agri Star Herbicides about $15 an acre... 35% FOOD GRADE PEROXIDE...it works like glyphosate and also many other uses. Vineager, salt and cayenne pepper extract....makes a homeade version of glyphosate/callisto combination..