Nasturtium Growing Guide
Growing Nasturtium is easier than you think. This guide walks you through everything you need — from planting your first seed to harvesting.
At a Glance
Difficulty
Easy
Category
Flower
Sun Exposure
Full Sun, Partial Sun
Frost Tolerance
Frost Tender
Growing Zones
Zones 2, 3, 4, 5, 6, 7, 8, 9, 10
Plant Family
Tropaeolaceae
Growing Season
Warm Season
Plant Lifecycle
Annual
Also grows well as
When To Start
First Chance to Plant
7 Days After Last Frost
Last Chance to Plant
30 Days Before First Frost
When should you plant Nasturtium?
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Your Nasturtium Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
The Journey Ahead
Nasturtium's Lifecycle
Seedling
Mature Plant
Seed Production
Step 2
Planting & Sprouting
Expect sprouts in 7–14 days
Growing Tips
- 1Nasturtiums thrive in full sun, so plant them where they can get at least 6 hours of sunlight daily.
- 2They prefer well-drained, moderately fertile soil; avoid over-fertilizing, as this can lead to more leaves than flowers.
- 3Water them regularly but allow the soil to dry out between waterings to prevent root rot.
- 4Space the plants about 10 to 12 inches apart to ensure good air circulation, which helps prevent fungal diseases.
- 5To manage pests, consider using companion planting with herbs like basil or mint, which can deter common nasturtium pests such as aphids.
Seedling Phase
Step 3
Growth & Maturity
~60
Days to Maturity
30 cm
Mature Height
45 cm
Mature Width
Pests to Watch For
Diseases to Watch For
Mature Plant
Step 4
Harvesting
Harvest Window
45 days
When to Pick
Pick flowers and young leaves regularly
How to Harvest
- 1Harvest nasturtium flowers and leaves in the morning when they are fresh and vibrant.
- 2Use scissors or garden shears to cut the stems just above a leaf node to encourage new growth, being careful not to damage the main plant.
- 3Regularly harvesting will promote more blooms and foliage.
Step 5
Saving Seeds
How to Save Seeds
Saving seeds from your Nasturtium plant is easy and rewarding, even for new growers! Once the flowers fade, you’ll notice round, green seeds forming where the blooms were—let them dry on the plant until they turn brown and fall off easily. Simply gather these seeds, brush off any dirt, and let them air dry for a few days. Store your seeds in a paper envelope or a glass jar in a cool, dry place, and label them with the date. You’ll be amazed at how simple it is to save seeds and grow even more beautiful Nasturtiums next season!
Seed Production
Feeling inspired?
Grow Nasturtium from seed.
An edible flower with a peppery kick. Buy a pack and get started.
$2.25
CAD
In Stock
