Acer Palmatum Atropurpureum 20Ø 70cm

Pot diameter: 20cm

Acer palmatum 'Atropurpureum' – Care for Japanese Maple

Acer palmatum 'Atropurpureum' is an iconic deciduous tree or shrub that brings a touch of oriental elegance to the garden. It is prized for its deeply lobed, five-lobed leaves with an intense burgundy red to purple hue, which turns vibrant crimson in autumn. It grows picturesquely, more or less slowly, making it a perfect focal point for Japanese gardens, rockeries, or even large containers on terraces.

Watering

For Japanese maples, balance is key. They have a delicate and shallow root system that is sensitive to extremes.

When to water: The substrate should be constantly moderately moist, but never waterlogged. The root ball must not completely dry out, otherwise the leaves will immediately start to dry out from the tips.

Summer care: On hot summer days, it requires regular watering (even daily for potted plants). Mulching with bark is ideal to maintain moisture around the roots.

Water: Soft rainwater is best. Excessively hard water can eventually cause yellowing of the leaves (chlorosis).

Light

'Atropurpureum' needs light for its colors, but does not tolerate extreme heat.

Location: An ideal location is one with bright, diffused light or partial shade.

Sun vs. Color: For a rich red color, it needs several hours of sun (preferably morning sun). In deep shade, the leaves turn green.

Beware of sunburn: Strong afternoon summer sun combined with dry air can "burn" the leaves. A location protected from drying winds is suitable.

Temperature and Air

Ideal environment: It loves higher air humidity. It thrives near garden ponds.

Frost resistance: It is fully frost-hardy (down to approximately -20 °C), but young plants in containers should be protected in winter (wrap the pot in jute). Late spring frosts are dangerous for it, as they can damage freshly emerged leaves.

Air: It requires a location protected from drafts and strong winds, which mechanically damage its delicate leaves.

Fertilization and Pruning

Fertilization: From spring to mid-summer, use fertilizers for acid-loving plants or slow-release fertilizers. Do not fertilize after August, so that the wood has time to mature before winter.

Pruning: The natural shape of the maple is its greatest asset, so pruning is not necessary. If you want to shape the plant, prune during dormancy (November–January) to prevent the tree from "crying" (losing sap).

Substrate and Planting

Acidic pH and permeability are fundamental.

Composition: It requires a humus-rich, well-draining, and acidic soil (pH 5.5–6.5). An ideal mixture is garden soil, peat, and a little sand.

Drainage: When planting in containers, a thick layer of expanded clay or gravel at the bottom is essential to prevent the roots from standing in water, which leads to rot.