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Rhododendron occidentale, the western azalea or California azalea - a deciduous, branched small tree or shrub 1.8–3 m tall. Leaves are 3–9 cm long and 1–3 cm wide. Flowers open simultaneously with the leaves or shortly after. The raceme consists of 3–15 flowers, each 4–6 cm in diameter, white-pink with a yellow-orange spot on the upper petal and long stamens.
Moisture-loving. Grows well in sun and partial shade. Decorative also during autumn leaf coloration. Hardy to –29 °C.
Sowing instructions:
Seeds are sown on the surface without covering with soil. Boxes should be covered with glass or film to maintain high humidity. At room temperature, seedlings appear in 3–4 weeks.
Propagation by seed:
- Soil composition: loose, acidic, well-aerated substrate with peat as a mandatory component.
- Optimal pH: 4.0–5.5 (up to 5.8 possible).
- Best sowing time in greenhouse: November–December at 18–24 °C. Early sowing extends the growth period, allowing seedlings to develop better.
- Seeds require light for germination, so sow without burying, scatter on the surface, cover with glass.
- After most seeds germinate, remove the glass and move containers to a cooler place (15–17 °C) for hardening and better development.
Care:
Maintain optimal moisture. Avoid overwatering, as it can cause infection leading to seedling death. Water carefully in the morning with a sprayer or fine watering can.
This ornamental shrub is valued for its fragrant flowers and striking autumn foliage.
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