Plant Profile: Morus rubra 'Collier'

The Collier red mulberry is a native tree known for its dual purpose as both an edible and ornamental species. This tree is a hybrid of the red and white mulberry varieties and has a lifespan that can reach up to 125 years. However, its tendency to behave invasively can be a drawback. Compared to black mulberry, it exhibits greater cold hardiness.

In urban settings, female trees are often viewed as less desirable due to the mess created by their fruit, which can stain driveways, cars, and surrounding areas. Additionally, these stains can inadvertently be tracked indoors on shoes. If you prefer a cleaner landscape, it’s advisable to avoid planting this tree. Instead, consider non-fruiting cultivars of the similar Morus alba as a more suitable option.

Regarding potential issues, the tree may face threats from borers, particularly in southern regions. Whiteflies can also infest some specimens. Other concerns include bacterial blight, which can damage leaves and branches, as well as coral spot cankers that may lead to twig dieback. Additionally, conditions such as bacterial leaf scorch, powdery mildew, root rot, and witches' broom can arise. It's important to monitor for pests like scale, mites, and mealybugs, along with the challenges posed by self-seeding and messy fruit.

For further details on Morus rubra, additional resources are available.