Hi there Kasima,
Ecuador Pink is best as a standard from all of the people I have come in contact with you loose the flowers if it is a bush enrich is a shame as the blooms are to die for.
If you do want it to bush up I would cut it back to about 2-3 foot tall and allow all the side shouts develop but I would wait till the frost have passed to do this!

Then you can do cuttings from what you have taken from the plant at that time, you can cut it back to the ground but I avoid this as we don't need to worry about harsh frosts in Australia

The other plant you call Charles Grimaldi is not so as we do not have this plant in Australia
If you could post a great pic of the bloom I may be able to help with its name I think that it could be 'Old Apricot' some people in the Hort industry call plants names just for $$$$$$$$ I hope that this helps you

A 5 gallon pot is OK I usually pot them up to a 12' pot and keep them there for a while and change there soil every 2 years you can use a good potting mix with compost and cow/ sheep manure and top it of with dynamic lifter

You can also check my link for Charles Grimaldi ID
My blog is
brugmansiaworld.blogspot.com

Hi, Kasima............it would help if we knew where you are loacated.

The Charles Grimaldi that this plant came from was very old. Your Old Apricot leaves are nothing like its leaves, as this plant has serrated leaves. The flowers start cream yellow and gradually turn orange, are pendulous and extremely large. I know there is a controversy over whether CG has serrated or smooth leaves, and I'm not sure who has won on that, but San Marcos growers claims that it has a true Charles Grimaldi obtained from San Francisco Botanical Garden and it has serrated leaves. I'm sorry, but I can't post a pic as I don't have a smartphone or a digital camera that is working right now.

I'm in zone 10A.

I'm in zone 10A.

I found a picture of a Charles Grimaldi at Denver Botanical Gardens and it says the immature leaves are serrated, so this is proof (to me ) that what I have is a CG. This plant is small, with serrated leaves, but my aunt's plant looked almost exactly like the picture on the DBG site.

Then I found another site that says that CG has serrated leaves and Dr. S. does not.

Who knows? It was always tagged CG at my Aunt's house, so that's what I'm calling it. I'm not selling them, so what does it matter, really? If I give cuttings away, I'll let people know the deal.

I have both and I can tell youl that both have serrated leaves. Charles Grimaldi is the "son" of Dr. Seuss and I believe Frosty Pink. Both of these brugs get quite large and are better left as trees. I have three Dr. Seuss' inground in zone 8 and they come back each year and give me several LARGE flushes. Most people in zone 10 do not ever have to cut their brugs back as I do here in zone 8 in North Texas.

I have both and I can tell youl that both have serrated leaves. Charles Grimaldi is the "son" of Dr. Seuss and I believe Frosty Pink. Both of these brugs get quite large and are better left as trees. I have three Dr. Seuss' inground in zone 8 and they come back each year and give me several LARGE flushes. Most people in zone 10 do not ever have to cut their brugs back as I do here in zone 8 in North Texas.

Good to know. My aunt's mature CG was about 10 feet tall and gorgeous! If that's how it wants to grow, so be it. I heard, though, that if you took a cutting above the 'y', the plant would only get 4 feet tall, so we'll see. It's still young, and hasn't y'd yet. The Ecuador Pinks are y'ing like mad and putting out all sorts of buds. They are so beautiful! I want to get them to have a really large canopy so that there are three colors of blooms on there. I just want the CG because it smells so good.

Sorry I thought you were here in Australia
We in Australia do not have Charles Grimaldi so I am mistaken
Sorry