how to grow rhododendron from seeds harvested from mature plants

Question

when should you deadhead rhododendrons?

Answer 1

If you want seeds, then you should not deadhead them. This will kill off any forming seeds. When seeds pods are ripe and starting to drop seeds, then you can collect and deadhead.

The Rhododendron Society offers some insight into germinating seeds: https://www.rhododendron.org/v48n1p10.htm

This article will help you with the care of the shrub: https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm