Overwintering Purple Fountain Grass in Cold Climates

Overview

Purple fountain grass (Pennisetum alopecuroides setaceum rubrum) is native to tropical Africa, the Middle East, and Southwest Asia. Hardy only in USDA zones 8–10; below 20°F it dies. In cooler zones, grow in containers and overwinter indoors.

Step 1: Container Strategy for Cold Zones

When temperatures drop, move pots to a warm, bright indoor spot. Let grass brown completely, then cut to ground. Water every two weeks during dormancy.

Step 2: In-Ground in Hardy Zones

Allow grass to die back fully in late fall before cutting.

Step 3: Cut Back

Use hedge trimmers or shears to cut to ground level. Rake clippings. Avoid exposing the root crown.

Step 4: Mulch for Insulation

If frost threatens, mulch over roots. Water deeply the day before cold arrives. Remove mulch after weather warms.

Step 5: Winter Watering

Water once weekly in winter. Avoid soggy soil to prevent root rot.