Suminagashi is a 10 to 15 foot tall and wide Japanese maple with reddish-purple spring foliage progressing to summer's maroon and autumn's bright red. It's habit is upright and vase-shaped. As like other Japanese maples in this region, it will be slow growing.
As will all Japanese Maples, provide deep, rich, well composted soil. If you are amending the soil, it is best to dig in compost to the plant's eventual width, so as to provide adequate conditions for the entire, eventual root profile. Amending just the hole that the tree is planted in is akin to planting the tree in a slightly bigger pot. Plant in filtered light to full shade, avoiding any mid-day sun or reflective sun. East or north exposures are best unless thre is a very good canopy and no reflective heat. Water weekly. Do not shear.