Pelargoniums, also referred to as “geraniums,” are decorative perennial plants that bloom for months on end with a profusion of vibrantly colored flowers. Some plants begin to bloom in the spring, but most do so from early June until the first hard frosts of the fall. They can bloom all year long if they are grown inside.
Because pelargoniums are not cold and frost hardy, they shouldn’t be confused with perennial plants that are cultivated outside all year round, such as cranesbill or the closely related true hardy geranium.
In addition to inside, in conservatories, and in greenhouses, pelargoniums are utilized to create vibrant displays in beds and borders, hanging baskets, and various containers. Pelargoniums have their own national society because of their widespread popularity. Local organizations like The Pelargonium & Geranium Society are also mentioned.
Cultivation
Pelargoniums should be taken indoors into a sheltered habitat in the fall because while they can usually withstand heat, drought, and strong frosts, they cannot. If kept at a temperature of at least 10-13C (50-55F), they can bloom all year.
The great majority of pelargoniums require full sun, or at the absolute least, excellent light.
While zonal pelargoniums may take some light shade, regal pelargoniums prefer light shade.
They require a healthy, moist, yet well-drained soil in order to flower extensively. Use an excellent multipurpose compost or one with extra John Innes for growing in pots.
Pelargonium varieties
Pelargoniums come in six basic types, with additional subtypes for some of them:
- Zonal pelargoniums: These are the bushy, upright ‘bedding’ pelargoniums that are cultivated outdoors in pots or in beds and borders and have enormous, single or double flowers. The term “Zonal” describes the leaf markings, many of which are very elegant and ornamental.
- Pelargoniums with ivy leaves: These are the trailing types, with fleshy leaves and single or double flowers in a variety of colors, used in hanging baskets or as container edges.
- Regal pelargoniums: These grow taller, bushier plants with single, infrequently double, flowers that are typically pink, purple, or white. Typically, they are raised outside in pots or for interior displays.
- Angel pelargoniums are smaller, more compact, and bushier than regal pelargoniums.
- Pelargoniums with scented leaves: As their name suggests, these plants are mostly planted for their intensely fragrant leaves, however they also produce pretty little solitary flowers. The leaves could also be distinctively lobed or toothed, variegated, or both.
- All additional pelargoniums that don’t fit into any other category are considered unique pelargoniums.
Pelargoniums are a specialty of various nurseries. Visit their websites to view the extensive selection, which includes photographs to assist you in deciding which ones to purchase: