Regal Geranium, Regal Pelargonium, Martha Washington, Pansy Flowered Geranium
Pelargonium x domesticum
pe-lar-GO-nee-um x doh-MESS-tik-um
Pelargonium x domesticum is a cross between Pelargonium grandiflorum and Pelargonium cucullatum. The 2013 version of The Plant List states that Pelargonium x domesticum L.H. Bailey is an unresolved infraspecific name, it does state that Pelargonium domesticum L.H. Bailey is an accepted name. Both names were named and described by Liberty Hyde Bailey in The Standard Cyclopedia of Horticulture in 1916. The plant is described in The Missouri Botanical Gardens website as Pelargonium x domesticum which was part of the group that was compiling The Plant List. The Plant List was a cooperative effort between the Missouri Botanical Garden and the Royal Botanic Garden-Kew. The Plant List is no longer maintained since the 2013 version.
The Royal Botanic Garden-Kew started a new website, Plants of the World Online, which does not list Pelargonium x domesticum or Pelargonium domesticum. This website lists 251 species in the genus Pelargonium.
I grew my first of these while I was living with Dr. Skinner in Carson, California. Then when I moved back to Missouri, I bought one in 2014 and another one in 2016 from Wagler’s Greenhouse.
They are really nice plants that come in a variety of color combinations. They are best grown as an annual but are winter hardy in USDA Zones 10 and 11. They require a minimum of maintenance, just removing spent flowers and dead leaves. They can grow up to 3’ tall x 2’ wide.
It is said that they need consistently cool nights for flowers to form, but here in mid-Missouri, it did very well for me throughout the summer. They like full sun, but I have found that they do best when given shade in the heat of the day. Mine grew perfectly well in dappled shade under the Elm tree.
Zones: USDA Zones USDA (° F)
Size: 18-36” tall, but normally smaller
Light: Sun to part shade
Soil: Well-drained soil or potting mix.
Water: Average water needs.
I normally don’t take mine inside for the winter, but it is possible to overwinter them as a houseplant. They should be placed in a bright, sunny window in a cool area and reduce watering. They can also be brought inside before frost and placed in a dark, cool location in the basement and allowing them to go dormant. You can also take cuttings of your plants to overwinter inside.
I didn’t buy one in 2017, but maybe I will again in 2018. They are very easy to grow and the only maintenance is removing spent flowers.
I hope you enjoyed this page and maybe found it useful. If you have any comments, questions or suggestions, I would like to hear from you. Please click on “like” if you visited this page. It helps us bloggers stay motivated. 🙂 You can check out the links below for further reading. The links take you directly to the genus and species of this plant.