Hibiscus Species, Neches River Rose Mallow

Hibiscus dasycalyx

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: dasycalyx (das-ee-KAL-iks) (Info)
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36-48 in. (90-120 cm)


15-18 in. (38-45 cm)


USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Sun to Partial Shade

Bloom Color:

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall


Unknown - Tell us

Other details:

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

From seed; direct sow outdoors in fall

From seed; direct sow after last frost

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored

Foliage Color:


Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Very high moisture needs; suitable for bogs and water gardens

Where to Grow:

Unknown - Tell us


This plant is said to grow outdoors in the following regions:

Montgomery, Alabama

Austin, Texas(2 reports)

Belton, Texas

Houston, Texas

Longview, Texas

San Antonio, Texas

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Gardeners' Notes:


On Aug 27, 2006, dmj1218 from west Houston, TX (Zone 9a) wrote:

This is a candidate for the federally listed endangered species act. It is found naturally in the wild in only three confirmed counties of East Texas (Houston, Trinity, Cherokee and possibly Harrison) counties. It occurs naturally in the marsh conditions found of the Neches, Trinity, and Angelina Rivers where the bases of the plants are found in standing water until late in the growing season (and many remain year round in marsh conditions). The primary threat to this species, other than encrachment and destruction of naturally occuring floodplains, is genetic integrity (it hybridizes readily with other hibiscus species). It is a host plant for the Hairstreak butterfly. It begins blooming in June and can continue blooming into October depending on water conditions. Seed is usually water di... read more


On Aug 22, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Hibiscus dasycalyx is Endemic to Texas.