What Are the Moisture Requirements for Acer 'Ample Surprise'?
Moist but well drained

Acer 'Ample Surprise' · Acer 'Ample Surprise'
Grow in moisture-retentive, well-drained, ideally slightly acidic soil, in a sheltered position with protection from drying winds. Thrives in part shade, as some sun is needed to develop the leaf colour, but will tolerate full sun if soil is reliably moist. Mulch in spring, especially when grown in containers, to improve moisture retention. See Japanese maples cultivation
Moist but well drained