Hibiscus moscheutos Summerific® 'Holy Grail' – Rose Mallow 'Holy Grail'

Discover the pinnacle of dramatic contrast with the 'Holy Grail' Hibiscus. This perennial is a true showpiece that captivates the eye. It displays immense, velvety red flowers so deep they border on black, standing out strikingly against dark purple, near-black foliage. The effect is spectacular, luxurious, and unforgettable, offering a bold presence and a tropical feel to any landscape from mid-summer until the first frosts.

Characteristics

• Foliage: Spectacular, dark purple, near-black foliage that holds its rich colour even in the intense summer sun. The foliage is deciduous.
• Flowering: Massive, opulent flowers reaching 20-23 cm (8-9 in) in diameter. Each flower is a rich, deep, velvety red, creating a stunning contrast with the dark foliage.
• Light: Full sun is essential to develop the darkest foliage colour and ensure abundant flowering.
• Habit: Forms a dense, upright, and well-rounded clump with excellent branching.
• Growth: Shows very vigorous growth each season. Reaches a height of 120 to 135 cm (48-54 in) and a spread of 135 to 150 cm (54-60 in).
• Soil: Thrives in rich, fertile soil that remains consistently moist but is well-drained.
• Temperature: Hardy in zone 4, the top growth of this herbaceous perennial dies back completely with the frost, re-emerging vigorously from the crown in spring.
• Resistance: Shows good resistance to White-tailed deer.

Use

• Types of Use: Perfect as a standalone specimen for maximum impact, at the back of a border to add height and drama, or as the star of a large mixed planting.
• Decorative Advantages: Its foliage-to-flower colour contrast is one of the most intense in the plant world. It creates a bold focal point and brings a touch of refined exoticism.

Care

• Watering: Water generously and regularly so the soil never dries out, especially during hot spells.
• Fertilization: Fertilize in the spring with a phosphorus-rich fertilizer to encourage blooming, and again in mid-summer.
• Taille: Cut the stems back to about 10-15 cm from the ground in late fall or early spring.
• Planting: Plant in the spring after the last frost, in soil that has already warmed up. Be patient, as it is one of the last perennials to emerge from dormancy.
• Winter Protection: Apply a thick layer of mulch over the crown after the first frosts to protect it during the winter.