The harvesting stage of cut flowers is critical to ensure maximum vase life and quality. Roses are typically harvested at the \textit{tight bud stage}, when the petals are still closed but have reached full color development. This stage helps in prolonging vase life as the flower can continue to open naturally after harvesting.
(A) Carnation – Incorrect. Carnations are usually harvested at the half-open stage.
(B) Jasmine – Incorrect. Jasmine flowers are often harvested when fully open.
(C) Rose – Correct. Harvested at tight bud stage for optimal longevity.
(D) Gladiolus – Incorrect. Gladiolus is harvested at spike emergence or early flowering stage.