I received my order from Thailand for Grafted Dwarf Singapore Pink Plumeria yesterday and on opening the package I discovered that two of the stems were soft and had gone black like they were starting to rot. I contacted the supplier who is sending a replacement but I was wondering if this plant had a chance if the rotting stems were cut off. The rest of the plant including the root ball and the main stem look healthy at the moment. Attaching some pictures below. Would be such a shame to throw it away.

Cut below the rotting areas to see what it looks like, and make additional cuts as necessary if the tissue looks unhealthy. Be sure to disinfect your cutting tool before each cut. Post additional pics if you can, but if the rest of the plant is firm, I believe you have a good chance.

Thank you for replying to my post. I cut the rotten bits off yesterday way down till I could see healthy tissue and white sap. The rot had reached further than what I initially thought. This is what it looks like now. I've put it in some soil as well. The tiny branch is firm and looks fine at the moment. I'll keep an eye on it.

Your soil looks like it's going to hold too much moisture. Needs to be about 50/50 - 60/40 potting soil and perlite. Or your rot issues have just begun.

Hi Teamcll, I'm using the same potting mix I normally use for Plumerias. It's 70% coco husk 10% Perlite and the rest is compost. I've not had any issues with water retention as it all drains straight out.
The plant in the pictures is a new one that arrived with rot and I'm only trying to save it(if it works) until I get my replacement from the supplier. Some of my happier older Plumeria's below in same soil combo. I'm also seeing an inflo on one which is exciting.

Looks like you've got it figured out. Best of luck to you! Here's a couple of my happy plumeria as well.