We have a large plant that we moved a few years ago. From the front the plant looks well and appears to have many buds ready to flower. However from the top and other side, much of the plant appears to have died. What can I do?
If the side that looks good is facing the shade and there is bright sun on the dead side, then my guess would be too much sun. These are better suited for shade gardens.
If this is in shade, already, then it could be an infections from soil that remain saturated for too long without a dry out.
This article will give you more information on the care that they require:
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm
Thank you so much Bushdoctor. The garden dips and the plant was in water for a great deal of water. I have cut away all of the dead and am not watering it at the moment. Will I still be able to save it if I move it?
Most rhododendron insect problems can be corrected with Neem oil. Here is more:
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/issues-with-rhododendrons.htm
This spring is very cool. I have rhododendron azalea and hostas to plant, and Heather. I had started hardening them on my second floor balcony. I was to overnight them third day of hardening. Temp was going to drop to 3°. So now they’re still in my house.
I am unfamiliar with climate in your country, and am not sure of the question being asked, here.
What I can do is post some articles that will help you to grow the plants in question.
https://www.gardeningknowhow.com/ornamental/flowers/heather/growing-heather.htm
https://www.gardeningknowhow.com/ornamental/foliage/hosta/growing-hosta-plants.htm
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm
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.
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
This bush was given to me from a lovely lady who has sadly passed away. Everyone who sees it wants to know what it is. I’m hoping you can help
It is a type of Rhododendron, it appears.
This article will help:
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm
They are planted 3 feet apart. Should I “replant” it using different soil?
The other one must have a perfect spot. Proximity doesn't seem to matter when it comes to environmental problems or disease. I would start with a soil test to see if the pH is between 4.5 and 5.5. Is it possible the soil's acidity is different between the two? Also, is drainage different? They require well-drained soil. I see spots on the leaves of both shrubs. Is that dirt or a disease or bugs possibly. I would check all those aspects. The soil test will also tell if something is wrong nutrition wise.
Here are more growing tips:
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/how-to-fertilize-rhododendrons.htm
I had a very mature rhodedendrum that was in amazing condition 2 years ago, This year it is completely dead right to the root. A number of my plants are now turning yellow and dying. My Japanese’s maple leaves are just beginning to dye I have attached photos together with a couple of other plants that I am worried about can you please advise?
There appears to be a widespread soil infection. Something like this would need to be dealt with by your local extension service. This article will help you to find the closest to you: