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Hardiness: 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) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Sun to Partial Shade
Bloom Color: Pale Yellow Chartreuse (Yellow-Green)
Bloom Time: Late Spring/Early Summer Mid Summer Late Summer/Early Fall Mid Fall Blooms repeatedly
Foliage: Herbaceous Smooth-Textured
Other details: This plant is attractive to bees, butterflies and/or birds Average Water Needs; Water regularly; do not overwater Suitable for growing in containers
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Patent Information: Non-patented
Propagation Methods: From herbaceous stem cuttings From seed; direct sow after last frost
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds
On Sep 15, 2011, saltcedar from Austin, TX (Zone 8b) wrote:
Lemon Yellow Rosemallow is tougher than it looks.
This plant has withstood 2 back to back hard Winters in the ground in Zone 8b.
Must have PM shade and regular water but it's a good bloomer in Austin, TX.
On Apr 28, 2011, htop from San Antonio, TX (Zone 8b) wrote:
Lemon Yellow Rosemallow (Hibiscus calyphyllus) is native to tropical Central, East and southern Africa, Madagascar and the Mascarene Islands. It also can be found in South Africa and Yemen. It is a cultivated ornamental in other areas of the tropics and subtropics. It has naturalized in Hawaii. The natural habitat of Hibiscus calyphyllus is open bush, thickets and forests and it is often found along rivers. It grows to 1-1.8 meters (3-6 feet) tall and is often prostrate and straggly. I tie my plant's stems onto bamboo stakes to give it a more upright appearance. The light green leaves are obscurely to distinctly three to five lobed. The 8-10 cm (3-4 in) wide flowers are bright sulphur yellow with a deep maroon eye. It can be planted in full sun; however, my plant does better in morning sun and afternoon shade or filtered light shade. It needs a moderate amount of water on a regular basis.
Especially in East Africa, the leaves of Hibiscus calyphyllus are eaten as a vegetable. During the rainy season, they are collected from the wild, wilted, chopped and boiled mixed with other coarse vegetables. In Kenya, elephants forage on the leaves. In Uganda poles made from the stems are used for building by the Karamajong people and it is used in the construction of huts by the Maasai people. This plant is also a food source in the Okavango Delta. The flowers are cooked and eaten when there is a shortage of food. In Uganda and Tanzania, the bast fiber (skin fiber, the "inner bark") is made into rope. In DR Congo the leaves are used in a mixture with several other plant species to prepare a cure for ganglions in domestic animals. In Kenya and Tanzania the leaves are used as a dressing applied to wounds. The vapour of boiled roots is inhaled and the decoction drunk to treat pneumonia. Hibiscus calyphyllus is cultivated throughout the tropics and subtropics as an ornamental.
My plant is growing in a container and I place it in a greenhouse during really cold winters.
Regional...
This plant has been said to grow in the following regions:
Gulf Shores, Alabama Orange Beach, Alabama Glendale, Arizona Amesti, California De Land, Florida Palm Valley, Florida Lafayette, Tennessee Austin, Texas Belton, Texas Bryan, Texas Desoto, Texas Magnolia, Texas Richmond, Texas San Antonio, Texas Wyldwood, Texas
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