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PlantFiles: Neches River Rosemallow
Hibiscus dasycalyx

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: dasycalyx (das-ee-KAL-iks) (Info)

» View all varieties of Hibiscus

2 vendors have this plant for sale.

4 members have or want this plant for trade.

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


Other details:
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens
This plant may be considered a protected species; check before digging or gathering seeds

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

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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive dmj1218 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 dispersed in the wild.

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

Hibiscus dasycalyx is Endemic to Texas.


This plant has been said to grow in the following regions:

Austin, Texas (2 reports)
Belton, Texas
Houston, Texas
Longview, Texas
San Antonio, Texas

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