The germination time for Plumeria seeds can vary depending on several factors, such as the freshness of the seeds, environmental conditions, and the specific Plumeria species. Typically, Plumeria seeds begin to germinate within a week to three weeks after being planted.

However, it’s important to note that some seeds may take longer, especially if conditions are not ideal. Maintaining a consistent temperature of about 75-85°F (24-29°C) and providing sufficient moisture can help speed up the germination process. Using a heat mat can also be beneficial, as Plumeria seeds thrive in warm conditions.

Remember, patience is key when germinating Plumeria seeds, as some may take longer than others to sprout. Consistently monitoring the soil moisture and keeping the seeds in a warm, bright environment will help ensure successful germination.