Mayesmayes, Why are you going to blame the nursery who sent or sold them to you (let alone, give them a bad name on here by listing their name in this forum)? NUTSEDGE is such a common (and aggressive) weed grass, and it can grow and spread like wildfire. Depending on variety, it is usually a lighter color--almost always with a lime green triangular leaf--with a dark center ridge. You must google it to find out how to eradicate it, most often with a herbicide, because it is so aggressive. If you pull it out, the "nuts" and underground rhizome's spread even more. And while pulling a few out early, once it has gone to flower is has already produced a vast amount of them that can take over gardens and grass. Digging them out or constantly pulling them while they are young may work, but you must pay a lot of attention to make it work. And do not compost or throw them anywhere else but in the garbage. They spread like crazy.