Oh my gosh, I'm so curious to know: does big blue liriope spread?
Oh, yes, it's absolutely true! Big Blue Liriope does grow, spread, and grow slowly through underground rhizomes.
Of corse, it does spread. You can plant it as ground cover or edging plant.
Yeah, it grows out and spreads, but that doesn't mean it's aggressive. It's actually a pretty slow-growing plant.
I hope my response was helpful. This Big Blue Liriope indeed grows and spreads, but it isn't particularly aggressive, in my opinion.