The flower language of nineteen roses is the highest point of love, love each other forever, and last forever.

Because the number 1 represents me, 9 is the highest point of the odd number, and roses represent love, so 19 roses represent the highest point of love. The flower language of eternal love is because the homophone of 19 is eternity, which means that I want to hold hands with you for eternity, love you forever, stay with you forever, and go on forever.

From one to the end is because 1 is the beginning of all things, 9 represents the singular end point, 1 and 9 represent from one to the end, which can show one's sincerity. It is more appropriate to give 19 roses to your lover or lover, or to give them during major festivals to express your feelings.