I am confused about liriope. I have a huge steep hill that I'm interested in planting something for low/no weed maintenence, as well as major erosion control Liriope seems to be a nice plant since from what I've read it can handle sun, shade, and even dry spells. I already have some type of Liriope growing near the top of my hill, but I'm not sure what kind it is. I'm afraid to divide it and plant it on the rest of the hill in case its the Spicata kind that spreads out of control. That's why i'm thinking about buying some bare root plants so at least I know for sure what I have.....the only thing that worries me is that even though Big Blue is listed as Muscari type.....this web site that sells the bare plants has this statement:

"Gardener Tips Big Blue is a runner and does not stay in clump form like other varieties of Liriope muscari. It does not spread as quickly as varieties of Liriope spicata, but it does send out rhizomes and slowly spreads that way. Plan accordingly when choosing a planting location."

So does it in fact still spread, and can get out of control? I don't want to have to weed on this hill as it's a huge steep hill. With that being said, if Big Blue is in fact a clumping form, how will I need to space them in order for it to be dense enough to crowd out weeds? Will these plants suffice for erosion control? Thanks.

Also, as a second question.....would my Liriope idea look too generic for this hill? Should I mix something else in? It would have to be low maintence, have some color, and help with erosion.....but I'm not sure what else could be mixed in this hill with Liriope that would compliment each other. I was thinking something different in the middle section of the hill where you can see the darker section of ground......there are some daylilies to the top right of this section. Roses off to the far left of the hill. Some kind of Liriope at the top of the hill near the house, along with some tall ornemental grasses. I want to make this look neat and cool, and also give me a peace of mind as far as erosion goes.....I'm just at a loss on what direction I should go.

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Here is a pic of my existing Liriope. We just bought this house, so I'm not 100% sure what everything is. That's why it makes me nervous to divide this stuff in case it's the aggresive kind.
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