Microclover seed can be pretty pricey. Most microclover runs about $30 to $40 per pound. For a new microclover lawn, you’ll need 1-2 pounds of seed per 1,000 square feet. So, if you have a medium-sized, 10,000-square-foot lawn, you’ll pay $300 to $800 for seed.  If you just want to overseed your existing lawn grass with microclover, you won’t have to deal with quite as much sticker shock (but the price is still pretty high). You’ll need to spread half a pound of microclover seed per 1,000 square feet, so you’ll pay $150 to $400 to overseed a medium-sized, 10,000-square-foot lawn.