Clover seeds? Depth of mulch?
Where can I buy white clover seeds? How much mulch do I need in typical flower/shrub bed to keep weeds away?
Do a Google search for bulk seed. Also try Ebay and Etsy; they are good sources for seed.
Mix your chosen clover seed with fine sand, sawdust, or soil, and broadcast over desired area. If you are seeding a large expanse, you may want to use a broadcast spreader on the smallest setting.
Rake the planted area to lightly cover the seeds. They won’t sprout if buried too deeply. Compress with a roller or by walking over the area. Water regularly until established.