Bluestar True

About this plant

Amsonia x 'String Theory' PPAF (Proven Winners®) is a breakthrough bluestar hybrid, boasting a dense, rounded habit of exceptionally fine, thread-like foliage. This unique texture creates a soft, airy, and cloud-like effect in the landscape, adding sophisticated elegance to any garden. In late spring to early summer, clusters of star-shaped, soft periwinkle-blue flowers emerge, providing a delicate and enchanting display. These charming blooms attract various pollinators, adding life and movement to your garden design. Beyond its exquisite flowers and foliage, 'String Theory' truly shines in autumn with a spectacular transformation to brilliant golden-yellow. This season-long appeal makes it an invaluable addition to borders, cottage gardens, or naturalized plantings, offering continuous beauty and structural interest.

Installation timing

When we're in season, outside of the winter months, our goal is to get your plants installed within about two weeks. That window gives us enough time to secure your plants from our supplier and find a spot on the schedule. Throughout the process we stay in touch through notifications and your existing client portal on the main A Cut Above website, which is separate from this landscaping plants shop.

Care & maintenance

A low-maintenance perennial, 'String Theory' thrives with minimal attention once established. Deadhead spent flowers for a tidier appearance, though it's not strictly necessary. Cut back old foliage in late winter or early spring before new growth emerges. Avoid over-fertilizing, as this can encourage leggy growth. Generally pest and disease resistant.

Watering suggestions

Proper watering is the single most important factor in your plant's survival after installation. Newly installed plants have a limited root system and rely on you for consistent moisture while they establish.

• First 2 weeks: Water deeply every day (or every other day in cooler, wet weather), soaking the root ball and surrounding soil.
• Weeks 3–12: Water deeply 2–3 times per week, adjusting for rain, heat, and soil drainage.
• After establishment: Water deeply about once a week during the growing season, and more often in extreme heat or drought.
• How to check: Stick a finger 2–3 inches into the soil near the roots — if it's dry, it's time to water. Deep, less-frequent watering encourages strong roots; shallow daily sprinkles do not.
• Avoid: Overwatering (soggy, waterlogged soil) is just as harmful as underwatering and can drown roots.

Watering needs vary by plant, season, soil, and exposure. Because proper watering is the customer's responsibility after installation, please make sure you understand and can follow these suggestions before ordering.

Good to know: plants and trees purchased from and installed by A Cut Above include a one-year limited warranty from the date of installation. Because plant survival depends heavily on proper watering and care after installation, losses caused by improper care, neglect, animal or chemical damage, or extreme weather are not covered, and we must be given the chance to inspect a struggling plant before it's removed or replaced. Coverage is one replacement per plant. Read our warranty info.