Nah'ru vines were a type of climbing plant native to the planet Vulcan. They bloomed depending on the season and level of care. Vulcans cultivated them in gardens.
T'Pol noted, upon visiting her mother's home in 2154, that the nah'ru vines were blooming early that year. T'Les replied that she had had plenty of time to tend to them since being dismissed from the Vulcan Science Academy. (ENT: "Home")