Rhododendron macrophyllum seeds (Pacific Rhododendron)

Description

Pacific Northwest Native rhododendron. In May, its large clusters of pale pink to intense rose coloured trumpet flowers that can rival any cultivar. When not in bloom its large smooth evergreen leathery 20cm long leaves are very attractive. Perhaps deer proof. Is a shorter compact plant in full sun, whereas will reach its 7m height in shade. Photos are from Hanson`s Northwest Native Plant Database.

• Seed Count: 25-30
• Collection Date:  Oct 2024
• Hardiness Zone: 6b-9b
• Height and Width: 7m x 7m at maturity
• Germination test type: hand sort
• Family: Ericaceae

How to germinate Rhododendron macrophyllum seeds:

Rub peat moss through a 4mm screen to create fine milled peat moss. Add some 20/30 filter sand (10% content max) and some greensand (1 tbsp/gallon of medium). Moisten, blend well and fill pots/flats/WHY and tamp firm. Sprinkle seeds thinly on medium surface and mist well. Give gentle warmth (20-25C). Lightly mist daily. Provide strong indirect light. Clear plastic cover will help maintain humidity and enhance germination/seedling survival by not letting medium desiccate. Seeds should germinate in 10 days. Never let seedlings nor medium dry out nor over water.  Prick out when large enough to handle into individual pots and grow on.  Shallow rooted.  Be warned seedlings have very fine hair like roots and can damage easily. Have pots ready to receive when transplanting to avoid roots from drying out.