Yep...just old hay for mulch. Or these rows do well with weed suppression cloth also, as they are not very wide. The hay sort of just dwindles away all through the garden season and then I just till it in when we are done and plant clover over it if we are in the second year. If in the first year of the row, I just don't till it, add more mulch and let it sit. Sometimes the chickens will pull the mulch over and grass will grow there but it's no big thing. In the second year we plant the clover over the rows at the end of harvest and till the paths the following spring.