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Blue star creeper requires very little care. Although the plant is very drought tolerant, it benefits from a bit of extra moisture in full sunlight or during hot, dry weather.
Thereof, how do I get rid of blue star creeper?
Cover the grass growing around the blue star creeper with a sheet, cardboard or another protective shield. Spray the foliage of the unwanted plant, on a dry, calm day, with a nonselective herbicide, such as a ready-to-use glyphosate product.
Simply so, why is my blue star creeper dying?
There are a number of things that could be causing the problem. The dying area could be too wet, which could invite root rot. In fact, this is my first guess - and your extra watering could be making it worse.
Blue Star Creeper (Isotoma fluviatilis) is a low growing, evergreen groundcover and can be quite invasive. While Isotoma axillaris is only winter hardy in USDA hardiness zone 11, Isotoma fluviatilis is hardy to zone 6 and thrives as a perennial in many parts of the United States.