Paulownia Hybrid 9501 – Premium Bare Root Cuttings (Grade A)
The Paulownia Hybrid 9501 is the original first-generation hybrid of the well-known 950x lineage, created from the cross Paulownia fortunei × Paulownia tomentosa. Selected for its impressive growth speed, straight trunk formation, and high productivity, it became the foundational hybrid that later inspired improved selections such as 9502 and 9503.
Recognised worldwide as a reliable and versatile hybrid, the 9501 performs exceptionally well across Europe, Asia, the United States, and Australia, making it one of the most widely cultivated Paulownia hybrids globally. Its robust genetic traits have made it a reference point for professional forestry, timber production, biomass programs, and large-scale ecological restoration projects.
Each root cutting provided by GreenSeed Paulownia is premium Grade A, selected for its structural integrity, vitality, and excellent rooting potential. Roots are conditioned for spring planting, ensuring reliable establishment and vigorous growth in a wide range of climates and soil conditions.
⭐ Key Characteristics
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Foundational hybrid of the 950x line: the original first-generation cross that led to the development of improved hybrids like 9502 and 9503.
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Fast annual growth: achieves 2–3 meters per year, capable of reaching trunk diameters of 40–50 cm within 7–10 years.
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Strong cold resistance: tolerates winter temperatures down to –27 °C / –28 °C, making it suitable for hardiness zone 5.
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High-quality timber: straight, lightweight, and stable wood ideal for veneer, plywood, biomass, biofuel production, and furniture manufacturing.
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Wide adaptability: performs well in diverse climates across multiple continents, including Europe, Asia, the USA, and Australia.
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Environmental contribution: high oxygen output and efficient CO₂ absorption support sustainable forestry and ecological restoration initiatives.
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Proven reliability: trusted for decades by professional growers for large-scale plantations, commercial wood production, and biomass industries.
📊 Technical Specifications
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Genus: Paulownia
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Type: Hybrid (first generation)
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Synonyms: Royal Treeme, Nordmax 21
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Parentage: P. fortunei × P. tomentosa
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Form: Bare root cutting
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Grade: A
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Average length: 10–18 cm
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Diameter: 0.8–3.5 cm
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Survival rate: 99 %
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Growth rate: fast – 2–3 m/year
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Mature height: 12–20 m
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Crown spread: 9–15 m
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Cold resistance: –27 to –28 °C
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Soil requirements: well-drained clay, loam, or sandy soils; pH 4.5–7.5
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Exposure: full sun to partial sun
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Hardiness zones: 5–8
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Primary applications: timber, veneer, biomass, biofuel, ecological reforestation
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Delivery: bare roots carefully packed to preserve moisture, vitality, and structural quality during transport
🌿 Why Choose GreenSeed Paulownia?
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Premium Grade A roots, freshly prepared and selected for maximum vigour
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Original 9501 hybrid — the reference point for professional plantations worldwide
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Secure packaging maintaining humidity and ensuring safe delivery
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Expertise dedicated entirely to Paulownia hybrids and species
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Trusted supplier for ecological, agricultural, and commercial reforestation projects
PHASE 1 — POT CULTURE (UNDER COVER)
Objective: ensure maximum rooting success, protect plants from frost, and achieve uniform sprouting.
1) Rehydration (mandatory)
Before planting:
- Soak the root cuttings in clean water for 5 minutes.
→ This reactivates the tissues and improves the success rate.
⚠️ Do not exceed 5 minutes.
2) Start Period
- Early spring
- Ideal temperature: 15–25 °C (59–77 °F)
- Under a greenhouse, tunnel, or bright sheltered area
3) Pot Planting
Use individual pots for optimal root development and uniform emergence.
✔️ Root orientation
- Place the thicker end upward (bud side).
- Insert the root slightly angled (20–30°)
→ Promotes activation of the upper buds.
✔️ Covering
- Cover the root with no more than 1 cm of substrate.
(Buds must remain close to the surface.)
4) Recommended Substrate
A heavy substrate slows down emergence. A light, airy mix ensures faster and stronger sprouting.
Use:
- Fine horticultural potting mix
- Light, well-draining substrate
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Optional: perlite for extra aeration
‼️ Paulownia does not tolerate excess water.
5) Watering (pot phase)
- Water moderately after planting.
- Keep the substrate slightly and consistently moist.
- Never waterlog the pot.
- Avoid all standing water.
6) Sprout Emergence
Timing depends on temperature and conditions:
- Sprouting usually occurs 3 to 8 weeks after planting.
- Faster in warm and stable environments.
In case of cold weather or late frost:
→ Cover pots with frost protection fleece.
