I have a rhododendron that lives on the north/west corner of the house. It doesn't do that well as not a lot of sun gets there. There is a holly starting to grow there, can I have these two grow together?
"...can I have these two grow together?"
Do you mean the ones that are currently growing together?
Both are full sun plants so it's not the best location for either. They can also be quite large when mature so neither should be planted that close to the house. But they are both hardy plants and can survive in a range of conditions.
The rhododendron looks like it's been there a while and has developed a very off balance shape. It's not the best candidate for moving because of it's age, size & location for digging. If moving pick the location carefully to work with that strong lean.
Just realized the tree in the picture is not a rohodo, I don't know what type of tree this is.
The tree in picture has been there at least 22 years, the holly just started growing maybe last year.
I'm thinking the lean is caused by it wanting sunshine since this corner gets almost none.
I would consider removing all of the shrubs/trees growing next to the house. All in the photo are too close to the house. I don't think any of the plants in your photo are worth transplanting but you can try. The big one is misshapen from leaning towards light and the roots for everything in that corner are intertwined making separating them more difficult.
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I am jealous that you can have rhododendron. They grow wild in the NC mountains where it's cooler but in my part of the state it's too hot. They can survive but I have to pick the location very carefully and still it's not guaranteed. I purposefully put them in "bad" locations (shaded) to help keep them cooler.
My new to me helianthemums got frost damage. I see some green shoots trying to grow. Do I prune back the dead looking parts or leave it alone? Also to prevent more damage. Can I just put a cardboard box or basket over the plant, some easy way to cover them at night?
I live inland from the San Francisco Bay area.
Some of my flowering shrubs limonium perezii and helianthemum and clematis got frost damage but are showing green shoots. Do, or when do I, cut back the damaged parts?