Paulownia 9502 Hybrid Seeds

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The Paulownia Hybrid 9502 is an improved selection of 9501, developed to provide more homogeneous growth, superior timber quality, and greater plantation stability. Created from Paulownia fortunei × Paulownia tomentosa, it is recognized as one of the most reliable hybrids in the Paulownia 950x lineage for professional forestry and commercial wood production.

👉 Key Characteristics

Origin: direct genetic improvement of Paulownia 9501.
Uniform growth: excellent homogeneity in large-scale plantations.
Superior wood quality: denser, straighter trunks, ideal for plywood, veneer, and high-value furniture.
Cold resistance: tested down to –25 °C, reliable for temperate climates.
High adaptability: thrives in various soils with good drainage and full sun exposure.

✔️ Perfect for professional plantations, timber industries, and large-scale reforestation projects.
✔️ Valued for its consistency, reliability, and improved performance compared to 9501.

📊 Technical Specifications

Type: Hybrid
Parents: Paulownia fortunei × Paulownia tomentosa
Height: 15–20 m
Spread: 8–12 m
Growth rate: Fast and uniform (2–3 m/year)
Cold resistance: –25 °C
Soil: Well-drained clay, loam, or sandy soils (pH 4.5–7.5)
Exposure: Full sun
Hardiness zones: 5–8
Main uses: Timber, veneer, plywood, furniture, reforestation

🌱 Paulownia Seed Sowing Guide

Practical, step-by-step instructions to germinate Paulownia from seed with high success.

🧰 Required Materials

Substrate: fine seed-starting mix, light and well-draining (optional: peat/coco + a bit of perlite)
Containers: seed trays, mini-greenhouse, or small pots
Watering: spray bottle or fine-rose watering can
Protection: clear lid, plastic wrap, or humidity dome
Thermometer: to keep 20–25 °C (68–77 °F)
Light source: bright windowsill or grow light if natural light is insufficient

1) Stratification (Cold Treatment)

Optional but recommended for better germination speed and uniformity.

Mix seeds with slightly moist substrate (peat, coco, or sand).
Place in a sealed bag or container.
Refrigerate at ≈ 4 °C (39 °F) for 4–12 weeks (1–3 months).

2) Sowing

Fill trays or pots with pre-moistened substrate (damp, not soggy).
Surface sow: scatter seeds on top—do not cover (they require light to germinate).
Mist gently with water.
Cover with a transparent lid or plastic wrap to maintain humidity (mini-greenhouse effect).

3) Germination Conditions

Temperature: 20–25 °C (68–77 °F)
Light: bright indirect light; avoid harsh direct sun
Timeframe: typically 10–20 days (sometimes longer)
Moisture: keep substrate evenly moist, never waterlogged

4) After Germination

Gradual aeration: once seedlings appear, open the cover slightly each day to reduce humidity and prevent damping-off.
Remove cover: when seedlings reach 1–2 true leaves.

5) Transplanting & Early Growth

Transplant at 10–15 cm (4–6 in) tall or at 2–3 true leaves if crowded.
Pot individually; keep in bright shade for 3–5 days, then increase sun exposure gradually.
Water regularly but moderately to avoid overwatering.