by Bronwynne Bailey
Hibiscus plants offer a rainbow of colors and petal shapes, each variety contributing a vivid and impactful display for your garden. Among the diverse types, the hardy hibiscus (Hibiscus moscheutos) is a tall shrub with 6–9-inch blooms, adding a dramatic flair to your landscape. The tropical hibiscus (Hibiscus rosa-sinensis) unfolds its petals to display dramatic colors, creating a stunning focal point. Meanwhile, the Rose of Sharon (Hibiscus syriacus) graces gardens with its sturdy, deciduous presence, extending a delicate beauty that evolves with the changing seasons. The fourth and last hibiscus in this series is a woody species, (Hibiscus mutabilis) or confederate rose, a southern favorite.
In this column, we focus on the hardy hibiscus. With its enormous blooms, the perennial hardy hibiscus adds a pop of color and value wherever you grow it. Hibiscus gives the Mississippi gardener a broad spectrum of color to infuse on the landscape. Some of the blooms can be as large as 12 inches across, which is why it is often referred to as the dinnerplate hibiscus.
Growth Habits
This bushy plant can grow from 2 to 5 feet tall, depending on the selection. It has foliage that ranges from light to medium green, while other varieties feature burgundy and dark-purple leaves. During the winter, the plant growth usually dies back to ground level.
Selecting the Right Location
The success of your hardy hibiscus venture begins with choosing the perfect spot. These plants thrive in full sun, so select a location that receives at least six hours of direct sunlight daily.
Soil Preferences
This variety of hibiscus is not particularly finicky about soil but does best in a well-drained, nutrient-rich environment. Incorporate organic matter into the soil to enhance its fertility and drainage. In areas with heavy clay soil, consider amending the soil with compost to improve its structure.
Planting Depth & Spacing
When planting a hardy hibiscus, ensure that the root ball is level with the soil surface. Spacing is crucial to allow for proper air circulation and prevent overcrowding. Aim for a spacing of about 3 to 4 feet between plants to give each one ample room to flourish.
Watering
While the hardy hibiscus is drought-tolerant once established, it is essential to provide consistent moisture during dry spells. Water deeply, ensuring the soil remains consistently moist but not waterlogged. Mulching around the base helps retain moisture and regulates soil temperature.
Fertilizing
To encourage lush growth and abundant blooms, fertilize your hardy hibiscus regularly during the growing season. A balanced fertilizer with a ratio such as 10-10-10 provides the necessary nutrients for these voracious growers. Apply fertilizer in early spring and again in midsummer.
Pruning
The hardy hibiscus beneits from regular pruning to shape the plant and encourage bushier growth. In late winter or early spring, before new growth emerges, give your hardy hibiscus a more thorough pruning. Remove any dead or weak stems, cutting them back to the base.
Winter Preparations
While the term “hardy” suggests resilience, providing winter care ensures the health of your hardy hibiscus. In late fall, apply a layer of mulch around the base to insulate the soil and protect the roots from harsh winter conditions.
Summerific Summer Storm flowers are huge, each flower spanning eight inches.
