Dutch white clover was once in common use, but fell out of favor when herbicides became popular and the "putting green" style of lawn became the fad. Now that we're finally moving away from that model, it's a good solution to suppress weeds in a grass lawn or to plant in difficult-to-grow areas or, well, for anywhere. It can even be used to suppress chinch bugs.
Dutch white clover is distinct from wild clovers, which tend to grow higher. At Ontario Seed Co. (a Waterloo-based seed company and hardware store) you can purchase dutch white clover in small packets for $1.95 up to 2 kilo bags for $16.95. (It doesn't take a lot: two kilos should cover a couple of acres.)
For more information, see:
* Cornell University page on Dutch White Clover
* Nova Scotia site on establishing Dutch White Clover