OK, despite the cache title, we're talking mud here, not grass.
My wife is a potter. Our garage is crammed with a kiln, potter's wheel, bricks of clay, glazes, mysterious tools, and shelf upon shelf of pots and other creations. It doesn't stop at the garage either... yep, every flat surface --- pots, pots, pots --- you get the idea. Some of her recent creations are shown here.
I'm not complaining at all. It really is beautiful art and nice to have around.. In fact, this cache is a tip-of-the-hat to Elaine and her hobby.
(...and I thought geocaching was an obsession!) 
I didn't see any poison ivy in the immediate cache area, but did notice some in the general area. You won't have to wade through any, regardless.
Please re-cover the cache with a little natural camo when you're finished.
***Congrats To TexasMoon For FTF***