Whirlybird Mahogany

Nasturtium

50d to harvest

Velvety mahogany blooms swirl with a beguiling, warm intensity, as if the garden has been brushed with espresso-dark pigment. Whirlybird Mahogany nasturtium forms a trailing cascade of rounded leaves and richly colored flowers with a peppery, tangy bite and a tender, juicy texture that shines in fresh arrangements and vibrant garnishes. Grow it for its showy, ornamental splash—an easy, fast performer that matures in about 50 days and rewards with continuous color.

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Feb 9th
Transplant / Sow Outdoors	Feb 9th
Harvest Begins	Mar 31st
Harvest Ends	Dec 9th

Crop Details

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

Recommended Companions

Lemon Gem Marigold

Hokus Cucumber

Summer Dance Cucumber

African Marigold Marigold

Frequently Asked Questions

What pest or disease commonly affects Tropaeolum majus (Whirlybird Mahogany), and how can I treat it?

Nasturtiums like Tropaeolum majus are commonly bothered by aphids and can also get powdery mildew in humid, crowded conditions. Spray aphids off with a strong jet of water or use insecticidal soap, and improve airflow by spacing plants and removing any heavily mildewed leaves. If powdery mildew appears, repeat a labeled mildew spray as needed and avoid overhead watering to keep foliage dry.

How can I tell when Whirlybird Mahogany (Tropaeolum majus) is ready to harvest?

Harvest for blooms about 45–55 days after sowing, when plants are actively flowering (fresh flowers form continuously as long as you keep harvesting). For seed harvest, wait until the seed pods swell and turn from green to pale tan, then collect them before they fully dry and scatter. Snip flowers in the morning for best quality and keep removing blooms to encourage more production.