Blue Cross Gentian

Blue Cross Gentian (Gentiana cruciata 'Blue Cross')

Blue Cross Gentian brings true-blue color to the garden at a time when many perennials are slowing down. Its compact, clumping habit stays neat at the front of a border, while the flowers tuck along the upper stems for a surprisingly rich late-season display. This plant rewards gardeners who want something distinctive without a huge footprint, especially in cooler-summer gardens. With good drainage and consistent moisture, it settles in and becomes a dependable seasonal highlight.

Distinctive Features

Blue Cross Gentian forms a low mound of glossy, dark green leaves, then produces clusters of trumpet-shaped, vivid blue flowers nestled in the leaf axils along the upper stems. Bloom typically runs from midsummer into early fall, extending blue tones later than many common border plants. The overall look is compact and sturdy, with flowers held close to the foliage for a dense, finished effect. Mature size is usually about 8 to 12 inches tall and 12 to 18 inches wide.

Growing Conditions

• Sun: Full sun to part shade, with protection from hot afternoon sun in warmer summer areas.
• Soil: Well-drained soil with organic matter, staying evenly moist but not waterlogged.
• Water: Moderate moisture, keep consistently moist during growth and flowering.
• Zones: USDA Zones 3 to 8.
• Notable Traits: Compact, slow-growing clumps with standout blue flowers and deer resistance is often reported.

Ideal Uses

• Focal Point: Plant a tight drift as a focal point at the front of a border where the late-season blue flowers can read as a concentrated band of color.
• Border Edging: Use along paths and bed edges for a neat mound that stays tidy while flowering late.
• Rock Gardens: Tuck into sharp-drained beds where compact form and strong color are needed.
• Containers: Grow in pots with excellent drainage to spotlight the vivid blooms up close.

Low Maintenance Care

• Drainage: Keep soil well-drained, especially in winter, since soggy conditions can cause decline.
• Watering: Water during dry spells to prevent stress and support consistent late-season bloom.
• Mulching: Mulch lightly to hold moisture and keep roots cool, keeping mulch off the crown.
• Division: Divide in early spring if clumps become crowded, handling gently since growth is slow.

Why Choose Blue Cross Gentian?

• True Blue Color: Vivid blue trumpet flowers bring a rare shade that stands out in late-season borders.
• Compact Habit: Stays about 8 to 12 inches tall and 12 to 18 inches wide for easy front-of-bed placement.
• Late-Season Interest: Blooms from midsummer into early fall when many gardens need a fresh lift.
• Design Friendly: Glossy foliage and close-set flowers create a tidy, intentional look in borders and rock gardens.

Blue Cross Gentian is most effective when planted in small groups, letting the blue flowers read as a deliberate late-season accent. Pair it with grasses, silver foliage, and warm-toned blooms to make the color pop without looking forced. Give it consistent moisture and sharp drainage, and avoid baking heat, and it will perform steadily year after year. If you want late-season blue in a compact package, this plant fits beautifully.