Acer palmatum var. atropurpureum (Red Japanese Maple)
One-year plants are perfect for re-potting to grow on for a season; transplants are best for prompt resale. For best branching, lightly pinch the stem tips when they're in tender new growth. An inexpensive alternative to grafted varieties, they are often sold in the GC in a #1 or #2 pot.
While Ragin' Red has the darkest red floral bracts of any C. florida it also has very dark red leaves, here in Oregon, nearly all summer long. Fall color is again red. So it really is in a red rage from spring until leaf drop.