Q.My Mature 12 Foot 40 Year Old Rhododendrons Have Produced A “nursery” Of One Inch Plants. There Are About 50 Of Them. Is This
unusual and should I transplant them. This has not happened in 22 years since we lived on our property.We have about 30 bushes over 12 feet tall.
Certified GKH Gardening Expert
It could be that they have managed to drop seeds or the conditions have become favorable for germination.
It is also possible for the larger plants to send out smaller shoots from the roots in the case of infection or any other stress.
Here is an article that will give some useful tips on the care of the shrub:
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm