
LIFE CYCLE
Annual
PLANT CHARACTERISTICS
light climber
GROWTH HABIT
Climbing / trailing
BLOOM SEASON
Spring to summer
FLAVOUR PROFILE
Ornamental
SUITABLE FOR
Outdoor
SEED TYPE
Open-pollinated seeds
PLANT TYPE
Flowering annual climber
PLANTING SEASON
Spring
FRUIT SIZE
Not applicable
PLANT HEIGHT
120–180 cm
LIGHT REQUIREMENT
Full Sun / Partial Shade
WATER NEEDS
Moderate
HARDINESS ZONES
Annual
CONTAINER GARDEN
Yes
PLANT SPACING
25–40 cm
PLANTING DEPTH
2–3 cm
GROWING CONDITIONS
Well-drained soil
Frequently Asked Questions
The title says "perennial" but the plant data lists it as an annual — which is correct?
The title says "perennial" but the plant data lists it as an annual — which is correct?
This is a genuine inconsistency: in its native Chile, Tropaeolum leptophyllum is a tuberous perennial, but the listing's life cycle and hardiness fields mark it as an annual, so treat it as an annual unless you can confirm otherwise.
Is this related to common nasturtium (Tropaeolum majus)?
Is this related to common nasturtium (Tropaeolum majus)?
Yes, they share the same genus, but this species looks very different, with thread-like foliage instead of the broad, rounded leaves typical of common garden nasturtiums.
What does "leptophyllum" mean, and why does it matter for this plant's appearance?
What does "leptophyllum" mean, and why does it matter for this plant's appearance?
It translates roughly to "thin-leaved," describing its unusual narrow, almost grass-like or thread-like foliage, quite different from typical vining nasturtium leaves.
Are the flowers or leaves of this species edible like common nasturtium?
Are the flowers or leaves of this species edible like common nasturtium?
Unlike common nasturtium, this rare species isn't established as a culinary plant, so it shouldn't be assumed edible without further confirmation.
Does it regrow from an underground tuber, or die completely at season's end?
Does it regrow from an underground tuber, or die completely at season's end?
In its native habitat it can persist via tuberous roots, though as grown in most gardens outside that range, it's typically treated as a one-season annual.
Why is this plant considered rare in cultivation?
Why is this plant considered rare in cultivation?
It comes from a narrow native range in Chile and isn't widely commercially propagated, making it a specialty find compared to common nasturtium varieties.