Planting guides for Annuals, Biennials, Perennials, Shrub & Vine seeds can be found at:
https://bloomoutlet.com/seed-guides/
Please read both the seed guide and this plant specific sowing instructions. If you are unsure of the best way to germinate the seeds, DO NOT SOW ALL THE SEEDS. Keep some in case the germination method you use doesn’t work.
RHODODENDRON FERRUGINEUM - Alpine Rose
Sowing Instructions (Cliff Notes Version): Sow seeds at 64-72F (+18 to +22°C) and keep moist for the first 2–4 weeks. After this period the sowing must be kept at a cold temperature (between –4 and +4°C) [between 25 and 39°F] for another 4–6 weeks.
It is beneficial to cover the sowing with snow during the cooling period. The temperature below it usually keeps in the optimum range of –4 to 0°C [25 to 32°F]. The sowing is kept moist, and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. After this cooling-period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to +12°C [41 to 54°F], even if germination has started. The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse.
Where not hardy, lift in autumn, pot up, and overwinter in a cool, dry place at 45F (7C). Seeds can also be sown at 55-61F (13-16C) in late winter.
Botanical Name: Rhododendron ferrugineum
Common Name: Alpenrose, Rostblättrige Alpenrose, Alpine Rose, Azalea
Type: Perennial / Evergreen Shrub
Flower Color: Rose-pink to crimson
Flowering Period: May - June
Plant Height: 3 ft (100 cm)
Light Requirements: Full Sun
Water Requirements: Moist
Soil Requirements: Well-drained
USDA Zones: 3-8