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Description
Pelargonium Domesticum, also known as the regal pelargonium or Martha Washington geranium, is a popular houseplant that belongs to the Geraniaceae family. It is native to South Africa and has been cultivated for its beautiful flowers for over 300 years. Pelargonium Domesticum is a perennial plant that can grow up to 2 feet tall with a spread of 1-2 feet. It blooms in the spring and summer, producing large clusters of pink, red, white, or purple flowers that have a ruffled appearance.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Geraniales |
| Family | Geraniaceae |
| Genus | Pelargonium |
Appearance
Pelargonium Domesticum has a bushy growth habit and produces large, lobed leaves that are often variegated with shades of green and white. The leaves can grow up to 6 inches long and 4 inches wide. The flowers of Pelargonium Domesticum are the main attraction, with large clusters of blooms that can grow up to 6 inches wide. The flowers have five petals, with the upper two petals being slightly smaller than the lower three. The petals are often ruffled and can be pink, red, white, or purple in color.
Care Guide
Water: Pelargonium Domesticum prefers to be kept evenly moist, but not waterlogged. Water the plant when the top inch of soil feels dry to the touch.
Fertilization: Feed Pelargonium Domesticum every two weeks during the growing season with a balanced fertilizer. Do not fertilize during the winter months.
Soil: Use a well-draining soil mix that is slightly acidic with a pH level between 5.5 and 6.5.
Sunlight: Pelargonium Domesticum prefers bright, indirect light. Avoid direct sunlight, especially during the afternoon hours.
Hardiness Zones: Pelargonium Domesticum is not frost-tolerant and is typically grown as a houseplant. It can be grown outdoors in USDA hardiness zones 9-11.
Common Pests & Diseases
Pelargonium Domesticum is susceptible to a variety of pests and diseases, including aphids, mealybugs, spider mites, and botrytis blight. Regularly inspect the plant for signs of infestation and treat with insecticidal soap or neem oil if necessary. Overwatering can lead to root rot, while underwatering can cause leaf drop and wilting.
Habitat
Pelargonium Domesticum is native to South Africa and grows in rocky, well-drained soil in the wild. It prefers a warm, dry climate and is often grown as a houseplant in cooler climates.
Question and Answer
Q: How often should I water my Pelargonium Domesticum?
A: Water your Pelargonium Domesticum when the top inch of soil feels dry to the touch.
Q: Can I grow Pelargonium Domesticum outdoors?
A: Yes, Pelargonium Domesticum can be grown outdoors in USDA hardiness zones 9-11.
Q: How do I prevent pests and diseases from affecting my Pelargonium Domesticum?
A: Regularly inspect the plant for signs of infestation and treat with insecticidal soap or neem oil if necessary. Avoid overwatering and underwatering.
Q: How do I propagate Pelargonium Domesticum?
A: Pelargonium Domesticum can be propagated through stem cuttings taken in the spring or summer. Dip the cuttings in rooting hormone and plant in a well-draining soil mix.
Related Plants
- Pelargonium zonale
- Pelargonium peltatum
- Pelargonium crispum
- Pelargonium odoratissimum
References
- “Pelargonium Domesticum.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b625. Accessed 15 Sept. 2021.
- “Regal Pelargonium – Pelargonium Domesticum.” Gardening Know How, www.gardeningknowhow.com/ornamental/flowers/geranium/regal-pelargonium.htm. Accessed 15 Sept. 2021.
- “Pelargonium Domesticum.” Royal Horticultural Society, www.rhs.org.uk/Plants/16767/Pelargonium-Domesticum/Details. Accessed 15 Sept. 2021.
