Description
A medium-sized, deciduous tree to about 15 m tall with large leaves and very attractive, bell-shaped, purple flowers. It is easy and fast growing and a popular ornamental in warm temperate regions around the world.
Germination Guide
🌍 Central and Eastern China, Korean Peninsula
Easy
Paulownia tomentosa is a fast-growing deciduous tree native to central and eastern China, known for its beautiful violet-blue foxglove-like flowers and large velvety leaves. Seeds have a mandatory high light requirement for germination and require surface sowing with constant moisture; cold stratification for 2 months at 4°C significantly enhances germination rates and reduces germination time.
Germination
Germination time
Expect germination in
7 – 60 days
Temperature
Min 18°C
Ideal 20°C
Max 28°C
🌡️ Temperature alternation recommended
— Temperature alternation or variation improves germination, with optimal difference of approximately 10°C between pre-treatment and imbibition temperatures
Substrate moisture
💧💧 High
Substrate & Container
Recommended substrate
Sand, vermiculite and peat moss mixture; well-drained seed compost
Recommended container
Seed trays or wide pots with clear plastic cover; biodegradable containers for individual seedlings
Growing Tips
Surface sow seeds without covering soil. Mix tiny seeds with sand or vermiculite for even distribution. Keep substrate moist using misting; do not allow desiccation. Use spunbonded polyester fabric or clear plastic cover to maintain high humidity and light penetration. Maintain substrate at 18-20°C. Germination typically appears within 7-21 days. Thin seedlings to one per container when large enough to handle. Protect young seedlings from pests. Cold stratification for 60 days at 4°C prior to sowing significantly improves germination and shortens germination period. Avoid waterlogged conditions; well-drained substrate is essential.
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