Scarlet rosemallow (Hibiscus coccineus)

Also known as: Wild cotton

The scarlet rosemallow (Hibiscus coccineus) originates from the southeastern United States, including states like Georgia, Florida, and Alabama. Naturally found in wetlands such as marshes and swamps, it thrives in garden settings with plenty of sunlight and moist, well-drained soil. Ideal locations include areas near water features like ponds or streams. Given its tall stature, providing support with stakes can be beneficial.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Scarlet rosemallow

Lifespan

Perennial

Plant Type

Herb

Plant Height

1 m to 3 m

Spread

60 cm to 90 cm

Leaf Color

Green

Flower Size

3 cm to 4 cm

Flower Color

Red

Images of Scarlet rosemallow

Quickly Identify Scarlet rosemallow

Stately perennial reaching 6-8 feet (183-244 cm) tall with scarlet, 5-petaled showy flowers.

Dark green, lanceolate leaves resembling cannabis, on sturdy, reddish stems.

Striking red flowers, 6-8 inches (15-20 cm) in diameter, star-like shape with unique staminal column.

Deep green, toothed leaves with 5-7 lobes, 5-8 inches (13-20 cm) long, arranged alternately.

Scientific Classification of Scarlet rosemallow

Phylum

Vascular plants

Class

Dicotyledons

Order

Malvales

Family

Mallow

Genus

Hibiscus

Species

Scarlet rosemallow

Planting and Growing of Scarlet rosemallow

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

6-12 hours

Ideal Temperature

68-86℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Scarlet rosemallow?

When watering Hibiscus coccineus, it's essential to ensure the soil remains consistently moist but not waterlogged. The goal is to provide a deep soak of about 500 milliliters, allowing the water to penetrate the root system thoroughly. This encourages strong root growth and lush foliage while avoiding water stagnation.

What are the symptoms of an underwatered Scarlet rosemallow? ›

What should I do if my Scarlet rosemallow is not getting enough water? ›

What are the symptoms of an overwatered Scarlet rosemallow? ›

How to save an overwatered Scarlet rosemallow? ›

What Are the Sunlight Requirements for Scarlet rosemallow?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours daily

Hibiscus coccineus benefits from full sun exposure, ensuring robust flowering and growth. Optimal sunlight enhances photosynthesis, leading to healthier, vibrant blooms and resilient plant structure.

How much sunlight does Hibiscus coccineus need? ›

What should you do if full sun is not available? ›

Why is proper sunlight important for Hibiscus coccineus? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Scarlet rosemallow?

Ideal Temperature: 68 ~ 86℉

Hibiscus coccineus thrives in warm environments, with an ideal temperature range between 68°F and 86°F. This range promotes healthy growth and vibrant blooms. Keeping the plant within this temperature zone ensures optimal metabolic activities and photosynthesis processes. If conditions are consistently maintained within this range, they will exhibit robust growth and flowering.

What Soil is Best for Scarlet rosemallow?

Soil type: Sandy loam, Loam

Soil PH: 6.5 ~ 7.5

Hibiscus coccineus thrives in well-draining soil that prevents waterlogging. This condition is crucial as it averts root rot, fostering a robust root system which supports lush growth and abundant flowering. The plant benefits from nutrient-rich soil, which provides essential minerals and macro-nutrients needed for vibrant blooms and healthy foliage. A good balance of organic matter promotes overall plant vigor. While drainage is critical, Hibiscus coccineus also appreciates soil that retains sufficient moisture. This balance assists in maintaining hydration during dry spells, ensuring continuous growth and development.

How to Fertilize Scarlet rosemallow?

Fertilizer type: Balanced

For Hibiscus coccineus, it's important to not overwhelm the plant with nutrients. A good rule of thumb is to apply liquid fertilizer at a diluted rate of half the strength recommended on the label. For slow-release fertilizers, about 1 pound (approximately 0.45 kg) per 100 square feet is generally adequate.

How to Prune Scarlet rosemallow?

Pruning Time: Spring, Summer, Autumn, Winter

Scan for older, less vigorous stems and branches. Cut them back to around half their size just above a node. This encourages younger, stronger stems to develop, ensuring the plant's vitality and fostering a balanced structure. Remove spent blooms by cutting them back to the first set of leaves. This process, called deadheading, directs the plant's energy from seed production into growing new blossoms and foliage, resulting in a more floriferous display. Throughout the growing season, subtly shape the plant to control its growth habit. Light cuts can be made to encourage a bushier form, especially if the plant starts to appear lanky or uneven. More About Pruning Techniques→

How to Propagate Scarlet rosemallow plant?

Propagate Time: Spring,Summer

Collect seeds from a mature Hibiscus coccineus plant. Soak them in water for 24 hours before sowing. This helps soften the seed coat, enhancing germination rates.

Select a healthy Hibiscus stem and cut a 4-6 inch long piece. Remove lower leaves and dip the cut end in rooting hormone to stimulate root development before planting.

In early spring, dig up the mature Hibiscus coccineus plant. Carefully separate the root clumps with a sterilized knife, ensuring each division has healthy roots and shoots.

More About Propagating Techniques→

How to Repot Scarlet rosemallow plant?

Repotting frequency: Every 1-2 years

Hibiscus coccineus typically signals the need for repotting through stunted growth, roots emerging from the drainage holes, or soil that quickly dries out after watering. Spring or summer is ideal, when the plant is actively growing and can recover swiftly.

Select a pot slightly larger than the current one, with adequate drainage holes. A ceramic or clay pot can provide stability and prevent water from standing in the root area, reducing the risk of root rot which Hibiscus coccineus is prone to.

Use well-draining, nutrient-rich soil. A mix containing peat moss, perlite, and compost is excellent for ensuring good moisture retention while preventing waterlogging, providing Hibiscus coccineus with necessary nutrients for vigorous growth.