I'm not a botanist or anything. This is just what I've read. But I remember growing up there being clover everywhere. It was vibrant, green, felt great under foot and flourished even in South Texas.
You don't see that often anymore. The claim I've seen is that herbicides commonly used to treat weeds on lawns kill it.
So I bought a couple 1lb bags off Amazon (I think about $10). We had a few weeds since we don't use herbicides (not out of principle or anything, I'm just not that into gardening). Anyways, the clover chokes out the weeds completely, looks great, seems to help the grass grow better, and is just nothing but a positive thing.
Really happy with it. Some of my super-gardener neighbors might not appreciate it. It's never come up. But I like that even during droughts my lawn stays vibrant and green with minimal water.