SproutSmart
SproutSmart™ Intelligent Garden Sowing

Alaska Nasturtium

Nasturtium
Zone 11b Save Garden

Planting Schedule

Add Alaska Nasturtium to your garden to build a schedule and get reminders.
Botanical illustration of Alaska Nasturtium
50d to harvest

Vivid, cool-weather blooms and peppery, bright flavor make Alaska Nasturtium a standout for gardeners who want instant sensory payoff. The tender leaves and crisp, juicy seed pods deliver a clean bite—pungent yet fresh—ideal for roasting, quick pickling, and adding lively character to salads and garnishes. Expect a vigorous, compact habit with fast results in about 50 days, so you can enjoy harvests early and often.

Crop Dates

Growing note: In frost-free Zone 11b, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 20th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity50
Sun RequirementsFull SunFull sun
Growth HabitSpreading
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)50
Min Night Temp (°F)35
Harden Off (days)Not Required

Today's Conditions

Outdoor planting for Alaska Nasturtium in Zone 11b typically begins around 2026-10-01. Wait until soil reaches at least 50°F before transplanting Alaska Nasturtium.

Garden Alerts

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

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Frequently Asked Questions

How do I manage powdery mildew on Alaska nasturtiums?
Powdery mildew shows up as a white, flour-like coating on nasturtium leaves, usually starting on older foliage. Remove and discard the worst leaves, improve airflow by spacing plants (and thinning seedlings if they’re crowded), and water at the soil line so foliage stays dry. If it keeps spreading, spray with an organic sulfur or potassium bicarbonate product labeled for powdery mildew on edible flowers.
When are Alaska nasturtiums ready to harvest?
Alaska nasturtiums are typically ready to harvest in about 50 days from sowing, with the best harvest starting when flowers first open. Pick leaves and flower buds regularly for continuous production; young leaves are most tender before they get thick or dark. For seed harvest, wait until pods turn brown and rattle lightly on the plant, then collect and dry the pods a few days.
Botanical illustration of Alaska Nasturtium

Vivid, cool-weather blooms and peppery, bright flavor make Alaska Nasturtium a standout for gardeners who want instant sensory payoff. The tender leaves and crisp, juicy seed pods deliver a clean bite—pungent yet fresh—ideal for roasting, quick pickling, and adding lively character to salads and garnishes. Expect a vigorous, compact habit with fast results in about 50 days, so you can enjoy harvests early and often.

Today's Conditions

Outdoor planting for Alaska Nasturtium in Zone 11b typically begins around 2026-10-01. Wait until soil reaches at least 50°F before transplanting Alaska Nasturtium.

Garden Alerts

In frost-free Zone 11b, 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 50°F for reliable germination and early growth.

Expert Note

For the best peppery flavor, grow nasturtiums in full sun and avoid over-fertilizing (leaner soil produces more flowers).