Paulownia tomentosa
Empress tree
Common names: Princess tree, Paulownia tree, Bluebell tree
Photo: Jean-Pol GRANDMONT · CC BY 2.5 · Source
This description was machine-translated.
Description
The Bluebell tree, botanically Paulownia tomentosa, originates from China and is one of the fastest-growing deciduous trees. In May, around weeks 18–20, large violet bell-shaped flowers appear before leaf-out, emitting a strong fragrance that attracts bees. The heart‑shaped leaves can reach impressive sizes, especially on young, heavily trimmed plants. Because of its rapid growth and prolific self‑seeding, the Bluebell tree is considered invasive in parts of Europe; it should therefore be planted only where runners and seedlings can be monitored, and away from wild areas or water bodies.
Care instructions
Provide the Bluebell tree ample space and full sun, as it grows vigorously each year and can add several meters in a single season. In the first years, regular watering—particularly during dry summer weeks—helps it establish. Older trees tolerate most sites well. A late‑winter pruning, around the end of February to early March (weeks 9–10), keeps the crown compact and encourages large, decorative leaves when the tree is supported on a stake. Consistently remove root runners and nearby seedlings to prevent uncontrolled spread. In mild winters, simple winter protection for young trees is usually sufficient; in harsher climates, a thicker mulch layer over the root plate is advisable.
Soil & site
Soil pH
Soil type
well-drained, loamy, nutrient-rich, dry
Feeding
Medium feeder
Pruning
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