Hey, thats a good question. I remember them discussing horseherb on the Texas Forum (I'm a fellow Texan too). Have you asked over there? I'm going to look. CJ

I have an answer-the stems are floppy, they root along the ground. Mine is in a low pot that gets lots of water, the stems are flowing over onto the ground where they are rooting in the regular dirt. I cut the rooted branches from the mother pot. They can be dug up and moved also. They are hardy, and can be mowed back. CJ

VERY HARDY and seems to do very well propagating on its own. Just plant/transplant one or two in your yard and in a few weeks you will have more horseherb than you can know what to do with. Horseherb seems to thrive in hot Houston weather. This ground cover (or commonly known in Houston as a perennial weed) is so hardy, in fact, you can subject it to the severest of treatment and it will still come back to haunt you in exponential numbers, propagating and invading every square inch of dirt in your yard and every surrounding neighbors' yard: you can mow it, (better yet) scalp it, starve it, deprive it of water, beat it, wack it to the ground, poison it in 100-degree heat, smother it, and even curse at it. There's no killing it! Horseherb firmly roots, which makes it time consuming to weed by hand, digging it up by the root, but it's the only way to get rid of any strays that end up in your flower beds AND BELEIVE ME, YOUR FLOWER BEDS WILL REQUIRE MAINTANANCE DURING THE GROWING SEASON.