Royal Empress Tree Winter Care and Graft Concerns

A Michigan gardener has one surviving Royal Empress tree (Paulownia tomentosa) from six planted. The 6–7 inch tall seedling has large leaves emerging from the root crown, not a bark-covered trunk. Questions about winter protection and growth habit.

Winter Protection

Essential for this tender, fast-growing species in Michigan winters:

• Build a wire cage around the tree
• Pack loosely with dry leaves or straw
• Ensure air circulation to prevent rot
• Remove protection gradually in spring

Growth Habit Concern

Leaves emerging from the root crown (not a trunk) suggest:

• Graft failure: If grafted, the rootstock (possibly non-hybrid Paulownia) has taken over after the scion died
• Natural suckering: Paulownia readily suckers from roots, especially when young or stressed

The resulting tree may not match the catalog description for form, flower, or growth rate.

Long-Term Warning

Paulownia tomentosa grows extremely fast (12+ feet/year) with aggressive roots that damage:

• Foundations and pavement
• Sewer and septic lines
• Drainage systems

Plant far from structures. Monitor for invasive spread—listed as invasive in several states.