'Beni Shi En' Japanese Maple: Delicate Purple-Red Foliage

Cultivar Profile: Acer palmatum 'Beni Shi En'

'Beni Shi En' (often translated as "Red Purple Smoke" or "Red Purple Mist") is a lesser-known but exquisite Japanese maple cultivar prized for its finely divided, lace-like foliage in deep purple-red tones. Its delicate texture and rich color make it a jewel in the collector's garden.

Key Characteristics

• Leaf: Deeply dissected (dissectum-type), 7–9 narrow lobes, 2–3 inches across. Color: rich purple-red in spring, holding well through summer, turning bright crimson in fall.
• Habit: Mounding, cascading small tree; 6–8 ft tall and wide (often wider than tall). Weeping habit with age.
• Hardiness: USDA zones 5–8.

Botanical Background

• Family: Sapindaceae.
• Species: Acer palmatum (dissectum group).

Growing Requirements

• Light: Part shade ideal; morning sun enhances color, afternoon shade prevents scorch.
• Soil: Moist, well-drained, acidic, rich in organic matter.
• Water: Regular, consistent moisture; mulch heavily.
• Wind: Shelter from drying winds to protect delicate foliage.

Landscape Uses

Perfect for a prominent spot where its cascading form can be appreciated: near a water feature, on a slope, atop a wall, or in a large container (with winter root protection). The fine texture contrasts beautifully with bold-leaved shade plants like hostas and rodgersia. Stunning when lit from below at night.

Care Notes

• Prune only to remove dead wood or improve structure in late winter.
• Fertilize lightly in spring with acid-formula fertilizer.
• Monitor for aphids on new growth.