Quote Originally Posted by Mr. Clandestine
. And definitely add a little more soil to the cup, the stem will root itself under the fresh soil and will also strengthen it up a little. It looks to have stretched some. If air can't circulate at the base of the stem, things become stagnant, and I think the seedling is more at risk of developing pythium wilt.
I thought if you covered the stem with additional soil at this point it would just cause the stem to rot or something like that.

I believe I read it in a post with stinky or weedhound.