What seeds are offered at feed store by me in winter.

I have most gotten white clover.

I'm not sure how far you are but there is a place called Knoxville seed, and they are outstanding, they have just about everything you could think of  in sizes from small packages to 50lb sacks, they know what they are talking about and prices are very good.

knoxville seed
https://knoxseed.com

and they go above and beyond, for example I got a sack of buckwheat seed last year and when pandemic hit and there was no flour in stores I was wanting to grind some buckwheat flour, I called them and asked if it was treated or anything like that, they did some checking and told me it was organic
a great place that does not advertise but they have EVERYTHING for farm or garden

I bought about 0.5 ounces of clover, since it contains hundreds of seeds.  So any amount from ~$1 to the cost of a 50 lb sack.  For an acre that sack would be too much for this land.

Yes, good idea, Bruce, you must have a great mill for the buckwheat seeds!  Thank you for the link, but ~60 miles away, versus 10 miles the other direction.

Merry Christmas to All + A happy New Year too!