Description
A medium-sized, deciduous tree to about 25 m tall with large leaves and very attractive, bell-shaped, pink to purplish flowers. It is easy and extremely fast growing and aside from a popular ornamental in warm temperate regions around the world, it is a choice species for forestry with its light but durable wood that can be used for a variety of purposes.
Germination Guide
🌍 Central and western China
Moderate
Paulownia elongata, commonly known as the Empress Tree or Pink Empress Tree, is a fast-growing deciduous tree native to central and western China. The species is renowned for its exceptional growth rate and attractive lavender-white flowers. Seed germination is light-dependent and requires consistent moisture and warm conditions, with cold stratification significantly improving germination rates.
Germination
Germination time
Expect germination in
7 – 28 days
Temperature
Min 18°C
Ideal 25°C
Max 25°C
🌡️ Temperature alternation recommended
— Alternating temperatures (35/25°C) promote better germination than constant temperatures. Base germination temperature is 18.8°C.
Substrate moisture
💧💧 High
Seed Pre-treatment
-
❄️
Cold stratification — 30 days at 4°C
-
📋
Additional notes
Cold stratification for 30 days or dry storage for 165 days significantly improves germination. Freshly harvested seeds exhibit non-deep physiological dormancy.
Substrate & Container
Recommended substrate
Fine vermiculite and coco fiber (1:1) or sterile seed-starting mix
Recommended container
Seed tray or container with transparent cover or humidity dome
Growing Tips
Surface-sow seeds on moist substrate without covering. Provide constant light and maintain 18-25°C temperature (ideally 25°C). Daily ventilation is essential to prevent fungal disease and damping off. Avoid waterlogging while maintaining high humidity using a transparent cover. Perform cold stratification (4°C for 30 days) or dry storage for at least 165 days before sowing to break dormancy and improve germination. Remove plastic cover once seedlings show 1-2 true leaves. Gradually acclimate to direct sunlight over 1-2 weeks. Transplant when seedlings reach 10-15 cm with 2-3 true leaves. Young seedlings are susceptible to frost and require protection.
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