Yes, there may be restrictions on importing certain Plumeria species into the US, particularly if they are on the USDA’s list of prohibited or restricted plants. Some Plumeria species may be considered invasive or pose a threat to US agriculture or native ecosystems. It’s crucial to consult the USDA’s list of prohibited and restricted plants and verify if the Plumeria species you intend to import is allowed. Additionally, if the species is not on the prohibited list, it must still meet phytosanitary standards and other USDA requirements for importation.