"Joe" wrote in message news:7yC0b.204267$Ho3.27283@sccrnsc03...
Is it OK to put oak sawdust on my garden this fall or spring and till it in?
I heard oak has tannic acid in it. Would that hurt it?
Thanks

I use oak sawdust in my compost pile all the time. It does lower the
pH, so you might want to monitor and use lime if you need to sweeten
the soil. But it's a great source of carbon for composting.