Plant Profile: Tropaeolum majus

Tropaeolum majus, commonly known as nasturtium, is an annual plant that thrives in warm climates, characterized by its lengthy stems, umbrella-like leaves, and distinctive spurred flowers with five petals. This plant is a favorite in various garden settings and is available in both climbing and bushy varieties. The bushy dwarf types typically reach heights of 12 inches and can spread up to 2 feet wide, making them ideal for flower beds, borders, ground covers, rock gardens, or mass plantings. In contrast, the climbing varieties can grow as tall as 10 feet, quickly enveloping fences, trellises, and slopes.

The name of the genus is derived from the Greek word "tropaion," meaning trophy, and the Latin "tropaeum," a term coined by Linnaeus due to the plant's trophy-like appearance.

Tropaeolum majus flourishes in well-drained soil that is poor to average, preferring full sunlight but benefiting from some afternoon shade during hot summer months. While fertilization can enhance leaf growth, it may also reduce the number of flowers produced.

This plant is resilient, showing tolerance to both drought and neglect. Its leaves, buds, flowers, pods, and seeds are all edible, offering a spicy, peppery flavor. The vibrant flowers make a delightful addition to salads, and the seeds can serve as a caper substitute. Additionally, the buds, which contain mustard oil, are often used as a seasoning.

When cultivating Tropaeolum majus, be vigilant for pests such as aphids, mealybugs, and whiteflies. The plant is also prone to self-seeding, which can lead to its spread.

For further details on Tropaeolum, additional resources are available.