Hey Jane

Some plumeria are notoriously hard to root. Most red varieties can be this way. But also the others can benefit from grafting too. Cuttings can take weeks to months to root regardless of the color and grafting can shorten that time.
Im pretty sure Most all rootstocks are seedlings but whether or not one seedling is better than the other I do not know.

mike

In a grafting, you cut the top off a seedling or established plant and then cut and attach the cutting to the cut stem and roots of the seedling. Once the cuts heal you have a well rooted plant. If you google grafting plumerias there should be a number of U-tube clips explaining how and why. However, it is not always as easy as it looks.

Thank you. Was looking for some Plumies and saw this mentioned. Wondered if they were grafted to unrelated root stocks.

Jane