Northwood red maple (Acer rubrum "Northwood") is a mid-sized member of the maple family, reaching a height of about 50 feet and potentially living up to 150 years. Northwood trees are known for their ascending branches and brilliant red-orange fall colors. They have a rounded to oval shape, and make ideal shade trees for lawns and back yards.
Climate and Conditions
Though they grow well in a warm, Mediterranean climate, Northwood red maples are also extremely cold-hardy, making them well suited to growing in many different areas. They thrive in Sunset's Climate Zones 1 to 9 and 14 to 17, and display the best fall color in cooler areas. Northwood red maples can tolerate soils ranging from acidic to alkaline, and with textures ranging from fine to course.
Northwood red maples shouldn't be planted in a dry spot. They are drought-tolerant once established, but prefer moist to wet soil. They prefer full sun to partial shade, and can develop a significant width, so choose a location where they have room to grow. Plant Northwood trees away from sidewalks and other structures to avoid potential damage when the roots grow.
Once established, Northwood red maples are low-maintenance. They should be watered as needed to keep them healthy when young, but this is not necessary for healthy adult trees. Fertilizing is also not necessary, though adding mulch around the base of the trunk can help regulate temperature, hold in moisture and add nutrients to the soil. Northwood trees do not need to be pruned, although you can prune healthy adult trees if you wish to control size and shape.
Pests and Diseases
Northwood red maples are resistant to most diseases and have few pest problems. They may occasionally be susceptible to aphids, but these insects rarely cause significant damage. Generally, natural predators keep aphid populations in check. If your trees develop a serious aphid infestation, treat them with insecticidal soap, neem oil, or insecticides containing acephate, chlorpyrifos, diazinon, malathion or permethrin.