In the first year, Mexican bush sage, Salvia leucantha, does not get very big. Then it gets cut back to the ground at the end of winter. It gets about twice as big in the second year, only to get cut back again as winter ends. By the third or fourth year, healthy maturing plants can grow to five feet tall and seven feet wide each season. While cut back, big clumps can be divided to propagate.
Strikingly purplish blue floral spikes bloom from summer or early autumn until frost. The odd white ‘tags’ that protrude from the fuzzy bracts are the true flowers. The lanceolate leaves are grayish sage green and somewhat fuzzy. Plants are well rounded like tumble weeds, and should not be shorn. Mexican bush sage is very popular among hummingbirds, butterflies and bees.
Mexican bush sage wants full sun exposure, and unlike most other sages, it prefers relatively rich soil. Fertilizer can compensate for inferior or dense soil, and improves foliar density, but too much can delay bloom. New plants like to be watered regularly, especially if they grow well. As they mature and disperse their roots, they become less reliant on regular watering.