Vesuvius

Nasturtium

40d to harvest

Like a burst of sunset on a green curtain, Vesuvius nasturtium blooms in vivid, flame-bright tones with a peppery snap that livens every garden stroll. The flowers are tender and succulent, with a crisp, juicy texture and a lively bite that shines in fresh arrangements and vibrant garnishes. Grow Vesuvius for abundant edible blossoms in about 40 days—an easy, showy favorite that turns beds and containers into living color.

Crop Dates

Growing note: In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Nov 10th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	40
Sun Requirements	Full Sun
Growth Habit	Bush
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	50
Min Night Temp (°F)	35
Harden Off (days)	Not Required

Frequently Asked Questions

What pest or disease most commonly affects Tropaeolum majus (Vesuvius) and how do I control it?

In nasturtiums (Tropaeolum majus), aphids and slugs/snails are common, especially on tender new growth and buds. Rinse aphids off with a strong water spray and use insecticidal soap if numbers rebound, while hand-picking slugs at dusk or setting copper barriers/beer traps around the plants. Avoid overhead watering and remove heavily spotted leaves early to reduce downy mildew and leaf-spot issues that worsen in damp, crowded foliage.

How often should I water Tropaeolum majus during peak growth (after it establishes)?

During active growth, keep the soil evenly moist but not soggy—water when the top 1 inch (2–3 cm) of soil feels dry. In full sun, this often means watering about 2–3 times per week, but less during cool or rainy periods. Never let water pool at the base, since saturated roots increase leaf-spot and root-stress in Tropaeolum majus.

How can I tell when Vesuvius nasturtium (Tropaeolum majus) is ready to harvest?

Harvest edible flowers and leaves once plants have formed multiple healthy stems and open blooms, which typically begins around 40 days from sowing. Pick flowers in the morning when they’re freshest, and harvest leaves when they’re about palm-sized or tender enough to snap lightly. For the best flavor, keep harvesting regularly—if you wait until seed pods are fully mature, flowering slows and the plant focuses on seed production.