Geranium Geranium × oxonianum f. thurstonianum 'Southcombe Double' (d)

Water

Hardy geraniums like the 'Southcombe Double' should be watered deeply once a week, allowing for variations according to weather conditions. When watering, aim to moisten the soil to a depth of at least 6 inches, which may require around 1-2 gallons of water depending on the size of the plant and the soil type. During the spring and fall, less water may be required as natural rainfall and cooler temperatures help keep the soil moist. In the hot summer months, check the soil moisture frequently, as you may need to water more often, especially if the plant is in a container or located in a hotter, sunnier spot. Always make sure that the plant is not sitting in soggy soil, as Hardy geraniums do not like to be waterlogged.

Light

The 'Southcombe Double' Geranium thrives best in partial shade to full sun. An ideal spot would provide morning sunlight and protection from the intense afternoon heat. However, it is a versatile plant that can tolerate a range of lighting conditions from almost full sun to light shade, but it is important to protect it from the harsh midday sun in hotter climates to prevent scorching the foliage.

Temperature

Hardy geraniums like 'Southcombe Double' prefer temperate climates and grow well in temperatures ranging from 60°F to 75°F. They can tolerate a minimum temperature of around 20°F, though prolonged exposure to sub-freezing conditions can damage the plant. Ideal growing conditions are in USDA hardiness zones 5 through 8 where the temperature range supports healthy growth and blooming.

Pruning

'Southcombe Double' Geraniums should be pruned to promote bushier growth, remove spent flower heads, and maintain a neat appearance. Prune lightly throughout the growing season to encourage continuous blooming. The best time for a more thorough pruning is after the first wave of flowering, typically in early summer, which helps to stimulate a second bloom and rejuvenate the plant. Deadheading the faded flowers regularly will also prolong the blooming period.

Cleaning

As needed

Soil

The best soil mix for 'Southcombe Double' Geranium, commonly known as Hardy Geranium, should be well-draining and loamy. It must have a pH ranging from slightly acidic to neutral (5.8 to 7.0). Incorporate organic matter such as compost or peat moss to enhance soil structure and water retention.

Repotting

'Southcombe Double' Hardy Geraniums typically don't need frequent repotting as they are quite adaptable to their environment. Repot every 3 to 4 years to refresh the soil and provide room for growth.

Humidity & Misting

The 'Southcombe Double' Hardy Geranium prefers average ambient humidity levels. It is adaptable and can thrive in the humidity levels typically found in garden settings without the need for any special adjustments.

Suitable locations

• Indoor

  Place in bright, indirect light, and ensure good air circulation.

• Outdoor

  Plant in part-sun to shade and water regularly.

• Hardiness zone

  5-8 USDA

Life cycle

Geranium × oxonianum f. thurstonianum 'Southcombe Double', commonly known as Thurston's cranesbill, begins its life cycle as a seed, which, when sown in fertile, well-draining soil and exposed to light, will germinate typically in the spring. The seedling stage follows, where the first true leaves develop, enabling photosynthesis and allowing the plant to gain strength and grow. As the plant matures into its vegetative state, foliage expands, and the distinctive geranium leaves become more pronounced, creating a dense, rounded form. Entering the flowering stage, Thurston's cranesbill will produce its characteristic double pink flowers, which can attract pollinators and may repeat bloom throughout the summer. After pollination, the plant will develop seed capsules, resembling a crane's bill, that eventually release seeds, hence completing the reproductive cycle. In the autumn and winter, the plant may die back, entering a period of dormancy, only to regrow from its robust rhizomes when the conditions become favorable again in the following spring.

Propogation

• Propogation time

  Spring to Summer

• The Geranium × oxonianum f. thurstonianum 'Southcombe Double', also known as the Hardy Geranium, is most commonly propagated through division, a process best done in spring or autumn. To propagate by division, carefully dig up the parent plant, ensuring a good amount of root and plant material. Using a sharp spade or knife, divide the plant into smaller sections, each with several shoots and a portion of the root system. Trim any excessively long roots to about 4 to 6 inches (10 to 15 centimeters), and replant the divisions at the same depth they were growing at previously, immediately watering them well to help establish the new plants. This method of propagation is popular for its simplicity and effectiveness, allowing gardeners to quickly multiply their Hardy Geraniums while maintaining the characteristics of the original plant.