Nandina domestica “Firepower,” commonly called “Firepower,” is a low-growing shrub, reaching 2 feet tall. It works well as a ground cover or as a border plant. “Firepower” has bushy foliage that changes color with the seasons. Its leaves are lime green during warmer months, turning brilliant red or burgundy as the weather becomes cooler. This plant requires little maintenance, but proper watering, fertilizing and pruning will ensure it develops plenty of foliage.
Water the soil around the “Firepower” when it becomes dry to the touch. Soak the ground thoroughly, but do not allow it to become soggy.
Spread mulch around the plants to help keep the soil cool and moist. Use organic mulch and spread a 2-inch layer on the soil surrounding the plants.
Fertilize “Firepower” once a year with a slow-release, all-purpose shrub fertilizer. Apply the fertilizer in the spring when the plant is showing new growth. Follow the fertilizer manufacturer’s directions for mixing and application method.
Cut back any damaged canes throughout the year. Cut the canes back to the ground with pruning shears.
Prune the plants early , if desired. “Firepower” does not require pruning, but cutting the longer canes may keep the plant from becoming leggy and sparse. This plant responds well to pruning, with new growth developing at the end of the cut canes.
Use pruning shears to cut the individual canes. Cut the tallest canes back to the ground to allow the remaining canes to develop, or cut the tall canes at staggered heights to develop an overall fullness.
Examine the leaves for small brown spots with yellow halos, symptoms of anthracnose, a fungal disease. .Nandina anthracnose causes leaf drop and can eventually kill the plant.
Treat anthracnose, if present, by removing affected leaves from the “Firepower.” Remove any leaves or plant debris from the ground surrounding the plants, as well. Apply a fungicide rated for use against the Colletotrichum fungus, following the fungicide manufacturer’s directions.
Avoid excess moisture on the “Firepower” to prevent anthracnose. Plants grown in shady areas are more susceptible to this fungus, as these plants take longer to dry. Water only the ground surrounding the plants, and avoid getting the leaves wet. Water the plants early in the day so they have a chance to dry. Thin out the canes with selective pruning to allow more air to reach the interior of the plant.