Plumeria seeds must be sown in a compote consisting of three parts of fertile soil and one of coarse sand and must be buried as shown in the photo,
so that the fin remains in the air and the "plump" part buried.
The pot should be placed in the sun and the soil is kept constantly humid until the moment of germination which takes place after about 7-15 days.
At that point, continue to breed the plant as you have done up to that point until it releases the third-fourth leaf.
At that point you can take the Plumeria with all the earthen bread and transplant it into a larger pot with the soil indicated for adult plants and treat it as such.
Generally after about 1 year they have a height of about 30 cm,
in the second year about 60-100 cm, in the third year 100-150 cm and they could start flowering.