Yarn would be nice and pretty weather-proof; but IÂd need to buy a lot of rolls of yarn to get one for each color! Plus I have 4 different kinds of white lilies. I was thinking about colored pipe cleaners but would still have that same problem. I actually bought knives to mark perennials, having read that on another forum post, but was too afraid of spearing bulbs to use them on the lilies. Probably a lot of mine are not planted all that far down. I know they are supposed to pull themselves down, but I have no experience of just how far down they can do that. When I dug some asiatics last fall I found they had made new bulbs all along the stem going right up to soil level. The knives would certainly be easy.

The same plant has been named several times. The first name published is the valid one : xPachyveria 'Powder Puff'. There is a rare and beautiful variegated form : http://www.google.fr/imgres?imgurl=http://www.xericworld.com/forums/attachment.php%3Fattachmentid%3D4300%26stc%3D1%26thumb%3D1%26d%3D1328500789&imgrefurl=http://www.xericworld.com/forums/showthread.php?t%3D2916&h=600&w=800&tbnid=0sNXg7oYf2RBPM:&zoom=1&tbnh=90&tbnw=120&usg=__phoemgUuUrtoDg3XBsgbuNlqcWw=&docid=88peNb3TxGTVSM

But that the foliage is not so straightforwardly Mazus.

Do you mean: Don't sell plants on Mercari? If so, why not? Lots of people sell plants on Mercari.