Thunbergia gregorii

An evergreen perennial climber that grows to around 3m tall and 1m wide or if left without support can become an extensive ground cover.

Bright pure orange trumpet-shaped flowers are produced throughout summer. This vine is cold hardy to 25 degrees F and will come back from the ground if nipped by a frost. Leaves are bright green and have a fine hairy covering.

Plant in full sun and water only occasionally. This vine is cold hardy and will come back from the ground if nipped by a frost.

Always choose healthy, well grown plants and plant after autumn rains as the soil is moist and warm and allows plants to become established before winter. This enables them to withstand dry periods during the following summer. Young plants require thorough watering during dry periods over the first two or three years mulching helps to conserve moisture and suppress weeds. Planting success is often improved on clay soils by adding extra topsoil and raising beds. Incorporate coarse sand, bark, compost or other organic material to improve soil structure.

Before planting ensure the root ball is saturated and remove the planter bag or pot with minimal root disturbance. Trim any broken roots and plant at the same level as in the container. Dig a hole twice the diameter of the root ball and firm in and water once planted. Make sure plants are watered well until established if planting in a drier period. Plant with some general slow release fertiliser and then every spring apply an organic based fertiliser such as blood and bone at a handful per square meter as new growth emerges.

Provide a climbing structure to support the growth of this plant.

Mulching annually helps suppress weeds and conserve moisture. Organic materials such as sawdust and bark contribute to soil structure as they decompose but keep mulching material away from the trunk. They benefit from a dressing (50g/m2) of general purpose fertiliser in early spring as new growth begins. This will encourage more vigorous healthy growth. Sprinkle evenly and work into the top 2 to 3cm of the soil taking care not to damage surface roots.

The first summer and autumn after planting is critical for young plants; water thoroughly during dry periods. Pests and diseases can have serious debilitating effects on young plants; check regularly. Check ties for chafing and constriction and remove as soon as plants are strong enough to withstand winds without damage.

Children's garden

The name for the genus honours the Swedish naturalist, Carl Peter Thunberg, who was a student of Linnaeus and spent several years botanizing the Cape of Good Hope.