I bought some a few months ago, and it didn't weep then. Recently, though I've been trying to get some Rotala mini butterfly to grow correctly, so I lowered the N ratio, bush hogged all the other stems and upped the light levels. To which my mini christmas moss responded by weeping. And I have weeping moss in the same tank, and it didn't weep half as well. They both seem to have similar leaf structures though. Anybody else's do that?