Tip. Most ornamental grasses are perennial plants, coming back year after year. 1 But a few are grown as annuals that last for just one growing season, especially in cold northern climates. For these, it is best to dig out the roots of the plants to prepare the planting site for something new.

When should ornamental grass start growing?

The best time to plant new ornamental grasses in your landscape is spring or early fall. Planting before the summer's heat (and often dry weather) arrives should give them enough time to root in before having to endure more stressful conditions.

How do you revive ornamental grass?

Fertilize the grass after dividing or cutting back in spring. Apply 1/4 cup of a 10-10-10 fertilizer per plant. Sprinkle the fertilizer in a ring around the grass, at least six inches out from the base of the grass clump. Water thoroughly after fertilizing so the nutrients leech into the root zone.