B and T World Seeds' reference number: 16112
USDA average, annual, minimum temperature Zone:10
Type of plant - shrub
Flower: YELLOW, RED centre, 6-9cm. dia.
Fruit: capsule to 17x12mm.
Foliage: ovate 10x8cm., hairy
Height in meters: 2x1.5

Synonyms (alternative names) for Hibiscus austrinus ssp austrinus: Hibiscus panduriformis, 

Common names for Hibiscus austrinus ssp austrinus: Yellow Hibiscus, 

Hibiscus austrinus ssp austrinus is included in the following B and T World Seeds flowering plant categories:
15:   Australian Natives and Introduced Species
37:   South African Native and Introduced Plants
65:   World Coastal Tree and Plant Seed List
131:   Toxic Plants
161:   Edible Flowers
185:   Plant Species whose germination is improved by Smoke
191:   Tropical Shrubs and Trees
487:  Malvaceae

Germination guide
Hibiscus austrinus ssp austrinus seeds will usually germinate in 30-60 days, even under good conditions germination may be erratic. Sow seeds about 2mm deep in a Well drained seed sowing mix at about 22°C.

Soak in warm water, which should be changed daily. Most seeds swell up when they are soaked, those that do should be sown immediately. Seeds that don't swell can be gently scarified.