We bought a bag of Sunshine growing mix this year for seed starting. It has coir, which I’ve seen some complaints about. But it’s organic, so we’ll see how it does.
My first flat of soil blocks made and planted. This seedling mix contains mostly Sunshine mix, but I added our own compost, some sand, a little azomite, and a little greensand. The flat contains borettana cipollini onions, leeks, and two kind of shallots.