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The Plant Guide

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Flame nasturtium

Tropaeolum speciosum

troe-pay-OH-lum spee-see-OH-sum

This tender perennial climber has edible, hand-shaped leaves and crimson red flowers in summer and fall which are uniquely textured. Their softly squared petals are held apart from each other at the flower’s mouth and the rear tapers to long spurs. The blooms yield blue fruits. Flame nasturtium climbs up to 10 feet.

Noteworthy CharacteristicsThese tender perennials are native to Central and South America. Some species are bushy or trailing; they are suitable for garden edges, herb gardens, covering banks, hanging baskets, and other containers.

CareGrow in moist, well-drained soil in full sun to partial shade. T. speciosum prefers a cool, shady root run.

PropagationSow fresh seed in pots in a cold frame.

ProblemsCaterpillars, flea beetles, black aphids, slugs, whiteflies, viruses.

  • Genus : Tropaeolum
  • Zones : 10, 8, 9
  • Plant Height : 6 to 10 feet
  • Plant Width : 6 to 10 feet
  • Characteristics : Attracts Hummingbirds, Fragrant Flowers, Self Seeds, Showy Foliage, Showy Fruit, Showy Seed Heads
  • Uses : Containers, Ground Covers
  • Bloom Time : Fall, Summer
  • Growth Rate : Fast
  • Light : Full Sun to Partial Shade
  • Maintenance : Low
  • Moisture : Medium Moisture
  • Plant Type : Perennials
  • Flower Color : Red
  • Plant Seasonal Interest : Summer Interest
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Comments

  1. user-3453363 09/14/2015

    My tropaeolum speciosum has not flowered this summer. What went wrong?

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