SproutSmart
SproutSmart™ Intelligent Garden Sowing

Whirlybird Series

Nasturtium
Zone 13a Save Garden

Planting Schedule

Add Whirlybird Series to your garden to build a schedule and get reminders.
Botanical illustration of Whirlybird Series
35d to harvest

A whirl of color at the garden’s edge—Whirlybird Series nasturtium blooms with vivid, ruffled-edged flowers that seem to spin in the light. The petals are tender and peppery, with a bright, lively bite, while the foliage stays succulent and crisp for a long season. Grow it for abundant edible flowers that shine in fresh displays and bring a playful, garden-fresh flair to salads, garnishes, and vibrant herb-forward mixes.

Crop Dates

Growing note: In frost-free Zone 13a, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 5th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity35
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)32
Harden Off (days)Not Required

Today's Conditions

Outdoor planting for Whirlybird Series in Zone 13a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Whirlybird Series.

Garden Alerts

In frost-free Zone 13a, grow this cool-season crop during the cooler dry season (October–February).

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Taishan Yellow Marigold
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Frequently Asked Questions

How often should I water Tropaeolum majus during its main growth to keep it thriving in full sun?
Water when the top 1 inch of soil feels dry, typically about 1–2 times per week depending on heat; aim for evenly moist soil, not soggy. During the weeks leading up to flowering, keep moisture consistent—irregular dry spells followed by heavy watering can reduce flower quality. Water at the soil line, since wet foliage increases the chance of fungal spotting on nasturtiums.
How do I know when Whirlybird Series Tropaeolum majus is ready to harvest?
Harvest “flowers” (and tender leaves, if you want) as soon as buds open; the first blooms generally arrive around 35 days after sowing. For best flavor, pick flowers in the cool part of the day and choose fully opened blooms with crisp petals. If you want seeds, leave some pods to ripen on the plant until they turn darker and feel firm, then harvest before they naturally dry and scatter.
Botanical illustration of Whirlybird Series

A whirl of color at the garden’s edge—Whirlybird Series nasturtium blooms with vivid, ruffled-edged flowers that seem to spin in the light. The petals are tender and peppery, with a bright, lively bite, while the foliage stays succulent and crisp for a long season. Grow it for abundant edible flowers that shine in fresh displays and bring a playful, garden-fresh flair to salads, garnishes, and vibrant herb-forward mixes.

Today's Conditions

Outdoor planting for Whirlybird Series in Zone 13a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Whirlybird Series.

Garden Alerts

In frost-free Zone 13a, grow this cool-season crop during the cooler dry season (October–February).

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

Sow directly after frost and keep plants lightly watered—nasturtiums flower best with average fertility and good sun.