Euphorbia, Cypress Spurge, Bonaparte's Crown, Graveyard Moss 'Fen's Ruby'

A noxious weed here in Massachusetts, spreading both by seed and underground by stolons. In the garden, this is a nasty thug, hard to con...Read Moretrol and impossible to eradicate. I suspect that it can escape from a sunken pot by seed or through the drainholes.

Here in Massachusetts, its trade, sale, transport, and planting are illegal, because of the damage it does to natural areas. Likewise in one other state. Colorado has declared it a noxious weed.

If you're trading divisions of perennials from your garden and you also grow this, please warn your trading partners.

It can be invasive but it has its place. Hardy, interesting. I very much like it when it is contained.

Spreads like crazy. This is growing in a xeriscape landscape under a conifer. It STILL grows like crazy. I really can't decide if I'm hap...Read Morepy about it or not. I'll worry about it next year.

Very beautiful groundcover that spreads like wildfire and is extremely difficult to remove. Visitors always comment positively on it and...Read More are thrilled with its softness. I manage it by pulling up every plant until its finally covered by the perennials. What's left of it grows and creeps out to the edge of the border in all its glory. I am more ambivalent about this plant by far than any other in the garden.