Clematis

About this plant

Clematis 'Jackmanii' is an iconic and beloved climbing vine, celebrated for its prolific display of large, vibrant purple flowers that blanket walls, trellises, and arbors from mid-summer into early autumn. This deciduous perennial offers a dramatic vertical accent, creating a stunning visual impact that transforms any garden space with its rich color and abundant flowering. Renowned for its robust growth and impressive bloom power, 'Jackmanii' is an excellent choice for both novice and experienced gardeners. Its striking blossoms, often up to 5-7 inches across, feature four broad petals that provide a magnificent contrast against its lush green foliage, making it a focal point in any landscape. Easy to care for and remarkably resilient, this cultivar is ideal for softening harsh architectural lines, providing privacy, or adding a touch of romance to pergolas and fences. With its reliable performance and spectacular floral show, Clematis 'Jackmanii' is a timeless addition that truly elevates the garden's aesthetic.

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

Plant in well-draining soil with the crown 2-4 inches below the soil surface. Ensure the 'feet' (roots) are cool and shaded, while the 'head' (foliage and flowers) enjoys full sun. Provide a sturdy support structure for climbing. Prune in late winter or early spring by cutting back all stems to 12-18 inches above the ground (Group 3/Hard Pruning). Fertilize annually in spring with a balanced slow-release fertilizer.

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.