nasturtium
Tropaeolum majus
About this plant
Tropaeolum majus, commonly called nasturtium, is a vibrant flowering plant known for its bright, trumpet-shaped flowers and round leaves. It is popular in gardens for its cheerful colors ranging from yellow to red and orange. Nasturtiums are edible and often used in salads for their peppery taste. They attract pollinators and can also act as companion plants to deter pests.
Taxonomy
- Genus
- Tropaeolum
- Family
- Tropaeolaceae
- Higher classification
- Order: Brassicales
- Plant type
- Annual
- Lifespan
- Annual
Origin & Distribution
- Native region
- South America (Peru, Bolivia)
- Distribution
- Widely cultivated worldwide, especially in temperate and subtropical regions as an ornamental and edible plant.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony, Indoor, Greenhouse
- Preferred window facing
- South-facing, West-facing, East-facing
- Watering frequency
- Moderate
- Watering interval
- 3–7 days
- Humidity
- Normal
- Minimum
- 5 °C
- Maximum
- 30 °C
- Optimal
- 15-25 °C
- USDA hardiness zones
- 9-11
- Soil pH
- 6.1-7.8 (slightly acidic to neutral)
- Soil type
- well-draining loam or potting soil mix
Watering. Water nasturtiums moderately, allowing the soil to dry slightly between waterings. Avoid waterlogging to prevent root rot.
Fertilizing. Nasturtiums do not need much fertilizer; too much nitrogen can reduce flowering. A light feeding with balanced fertilizer once or twice during the growing season is sufficient.
Nasturtiums are hardy and easy to grow plants that thrive in sunny spots with well-draining soil. They do not require much fertilizer and prefer moderate watering. If conditions are too wet, they may develop root rot, so avoid overwatering. They grow quickly and need little maintenance, making them great for beginners.
Propagation
- Propagation methods
- Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Brightly colored flowers, round leaves with a unique shield shape, trailing or bushy form.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Not considered a weed
Nasturtiums are non-toxic and safe to eat, but large amounts may cause mild stomach upset. Keep an eye on pets if they nibble on the plant.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen, Sap or latex, Skin contact
- Pollen level
- Low
Tropaeolum majus, also known as nasturtium, may cause mild skin irritation in some people who are sensitive to its sap. The plant produces pollen, but it is generally low in causing allergies. To reduce any risk, avoid direct contact with the sap if you have sensitive skin and wash hands after handling.
Common problems
Overwatering can cause root rot and yellowing leaves. Poor flowering may occur if the plant gets too much nitrogen fertilizer. Pests like aphids can sometimes appear but are usually manageable.
Uses
Grown mainly as an ornamental plant for its colorful flowers and edible leaves and flowers used in salads and garnishes. Also used in companion planting to repel pests.
Notes
Prune spent flowers to encourage more blooms. Nasturtiums can be grown in containers or garden beds. They prefer cooler temperatures and may struggle in extreme heat. Repot annually if grown indoors.