The Pelargonium blandfordianum hybrid and its related cultivars

pelargonium blandfordianum

Pelargonium blandfordianum is a lovely pelargonium with deeply incised grayish leaves which are fragrant with a scent of rose and white flowers with reddish blotches on the under petals.
It is believed to be a hybrid between P. radula and P. quinquevulnereum. There are a few variations of this plant, ‘album’ refers to the white flowered form and ‘roseum’ to the rose pink flowered form
which has a distinct rosy wormwood fragrance on the leaves.

This hybrid was developed during the early 1800s, introduced by George Spencer Churchill the Marquis of Blandford to which this plant derives its name. George Spencer was a keen and accomplished botanist while he resided at White knights park estate, a medieval manor which is now part of the university of Reading (white knights campus).
Here he became widely known for has large collection of rare and exotic plants from around the globe. Various species were also transported there from the royal gardens by order of the king. George took out a loan to expand and enhance his new estate, creating many new features, such as the ‘Chantilly garden’ which contained several conservatories possibly for tropical plants, a vineyard, bridges, a wide variety of trees, a botanical garden with a wide selection of unique plants, many from America, a wilderness and many seats, fountains, grotto’s and pavilions. Later the gardens fell into decline after George Spencer became bankrupt and his creditors set fire to his house in rage, the rest of the estate was sold off. But remains of the gardens was again found after the world wars.

photo by James Eggleton-unsplash.com

Pelargonium radula is a parent of the hybrid Pelargonium blandfordianum, it has decorative deeply incised leaves with a lemony rose fragrance and small pale pink flowers with dark purple markings on the upper petals. It has similar characteristics to P. graveolens which is closely related and possibly an equivalent to P. radens or a clone and also has a few forms with varied flower colours. The other parent is
Pelargonium quinquevulnereum

which was also believed to have been a hybrid, grown by Mr Armstrong who lived in Hampshire, that shares some similarities to Pelargonium graveolens.

Pelargonium radens is a tall upright shrub with delicate grey green finely divided leaves and light purple flowers with darker markings on the upper petals. The fragrance of the leaves are rose lemon scented and grows well in medium to large pots often growing beside other Plants.
Pelargonium graveolens has soft velvety triangular deeply incised leaves which have a somewhat rosy mint scent, a well known pelargonium since the 17th century in food and beverages, tea, potpourri and perfume.
Other hybrids related to Pelargonium radens or Pelargonium graveolens is P. ‘citrosum’ which has strong citronella lemon fragrance with pale pink flowers also known as the mosquito plant which is popular in the United States & Canada and is a cultivar of P. graveolens, also said to help deter mosquitoes.

P. ‘lady plymouth’ is a hybrid from the species
P. ‘graveolens’ with silver & cream leaves which
are variegated with a minty scent and light
purple flowers, there is also a similar cultivar
known as P ‘grey lady plymouth‘ with has grey
green leaves.
P. ‘Cinnamon rose’ has spicy cinnamon
scented leaves, and an upright growth with short
branches and pale purple flowers.
P. ‘Secret love’ is a eucalyptus scented leaf
pelargonium with light pink flowers showing
some characteristics to P. capitaum.
P. x melissinum is a cross between P. crispum
and P. graveolens which has large lemon balm
scented deeply cut leaves and pink flowers.

P. ‘rosemint’ has mint rose scented
leaves which are variegated and is used in
perfumes, showing some similarities to P.
lady plymouth.
P. ‘westerlund’ rose lemon scented leaf
close resembling that of P. graveolens.