What does it mean that the grass grows in February and the willows are drunk with spring smoke? What does "drunk" mean in the poem?

"Grass grows in February, willow on the shore is drunk with spring smoke" comes from "Village Residence" written by Gao Ding in Qing Dynasty. These two poems mean that in February of the lunar calendar, grass gradually germinates and grows, orioles fly around, and willows on the shore are intoxicated by the spring fog. Drunk is drunk. Between the lines of this poem, the poet's joy and praise for the coming of spring are revealed.