Cambridge Geranium Geranium × cantabrigiense 'St Ola'

Water

Cambridge geranium should be watered moderately, allowing the soil to dry out slightly between waterings. The frequency of watering will vary depending on climate conditions but generally, providing about one gallon per square yard every week during the growing season is appropriate. During hot, dry spells, you may need to water more frequently, while in cooler, wet periods, watering can be reduced. It's important not to overwater, as Cambridge geranium does not tolerate waterlogged soil. Ensure that the plant receives consistent moisture, especially when it's establishing during the first year after planting.

Light

Cambridge geranium thrives best in full to partial sunlight, meaning it should receive at least 4 to 6 hours of direct sun daily. An ideal spot would be in a location that gets morning sunlight and partial shade in the afternoon, protecting it from the intense heat of the day. However, the plant is adaptable and can also perform well in areas with more shade.

Temperature

Cambridge geranium is hardy and can tolerate a wide range of temperatures but grows best when the temperature is between 60°F and 75°F. It can survive in temperatures down to around 20°F but should be protected from prolonged freezing temperatures to prevent damage. Ideal growing temperatures should not exceed 85°F for prolonged periods, as extreme heat can stress the plant.

Pruning

Cambridge geranium should be pruned to remove dead or faded flowers and encourage bushier growth; this is known as deadheading. Pruning can be done anytime from spring to late summer, with the best time immediately after the first flush of blooms has faded. Pruning every year or every other year helps to maintain the plant's shape and promotes vigorous growth. It also helps prevent the center of the plant from becoming too woody and unproductive.

Cleaning

As needed

Soil

Cambridge Geranium thrives best in well-drained soil enriched with organic matter; a mix that retains moisture but isn't waterlogged is ideal. A pH range of 5.6 to 7.5 suits this plant. Incorporate compost and peat into the soil mixture to achieve the optimum balance for healthy growth.

Repotting

Cambridge Geranium does not generally require frequent repotting as it's a hardy perennial. Repotting can be done every 3-4 years or when the plant has outgrown its current container to provide fresh nutrients and encourage growth.

Humidity & Misting

Cambridge Geranium is tolerant of a wide range of humidity conditions and will thrive in average garden environments without needing specific humidity adjustments.

Suitable locations

• Indoor

  Place in bright, indirect light and keep soil moist.

• Outdoor

  Sun to part shade; moist, well-drained soil.

• Hardiness zone

  5-8 USDA

Life cycle

Geranium × cantabrigiense 'St Ola', commonly known as Cambridge Geranium, begins its life cycle when seeds germinate in spring, given appropriate conditions of moisture and temperature. Seedlings emerge and establish a root system before sending up shoots that develop into clumps of foliage. As the plant matures, it undergoes vegetative growth, producing lobed leaves and forming a dense mat. Flowering occurs in late spring to early summer, showcasing white to pale pink flowers that attract pollinators and facilitate cross-pollination. After pollination, seeds develop and are eventually released to start a new generation. During winter or unfavorable conditions, the plant goes dormant, with the roots surviving underground to regrow when conditions improve.

Propogation

• Propogation time

  Spring

• The Geranium × cantabrigiense 'St Ola', commonly known as Cambridge geranium, is most effectively propagated through division, a method that is typically performed in either spring or autumn when the plant is not in active bloom. To propagate by division, carefully dig up the parent plant, ensuring you take a generous portion of the root system. Gently tease apart the clumps into smaller sections, each with several shoots and a healthy root system. Replant these divisions promptly into well-preparing planting holes, spacing them about 12 inches (approximately 30 centimeters) apart to allow for sufficient room for growth. Water the newly planted divisions thoroughly to help establish them in their new locations. This straightforward technique allows the gardener to create new plants that are true to the parent plant's characteristics, resulting in a uniform garden display.