Nasturtium
Tropaeolum majus
About it
- Kind
- Flowers · Annual
- Family
- Tropaeolaceae
- Mature size
- to 1 ft × 2 ft
- Blooms
- Jun–Oct
- Hardiness zones
- Zones 2–11
- Sun
- Full sun
- Spacing
- 10 in apart, rows 12 in
- Soil depth in a pot
- At least 8 in
- Soil pH
- 6–7.5
- Water
- About every 7 days
When to plant
- Ready
- About 55 days
Based on your last frost date. Outside the US, check local advice.
Planting partners
What has been claimed about growing Nasturtium near other plants, grouped by how well it has been tested. Most companion planting advice has never been tested; the notes say which is which.
Tested in field trials
- With Broccoli Nasturtiums planted with broccoli reduced cabbage looper and imported cabbageworm damage in an Iowa study. UMN Extension ↗
- With Cabbage Nasturtiums planted with cabbage reduced cabbage loopers and imported cabbageworms. UMN Extension ↗
- With Pumpkin Nasturtiums planted with squash reduced squash bugs, and in an Iowa study reduced squash bug and cucumber beetle damage. UMN Extension ↗
- With Winter Squash Nasturtiums planted with squash reduced squash bugs, and in an Iowa study reduced squash bug and cucumber beetle damage. UMN Extension ↗
- With Zucchini Nasturtiums planted with squash reduced squash bugs, and in an Iowa study reduced squash bug and cucumber beetle damage. UMN Extension ↗
Safety for pets and children
- Cats Listed as a problem for cats (NC State Extension)
- Dogs Listed as a problem for dogs (NC State Extension)
- Horses Listed as a problem for horses (NC State Extension)
- Children No information in our sources
If a pet or child eats part of this plant, call your vet or poison control.
Read from NC State Extension ↗.
"No information" means our sources do not say, not that the plant is harmless. A non-toxic listing is not a reason to let anyone eat a plant.
Pests and diseases
No pest or disease notes for Nasturtium yet.
Check the label and your local extension service before using any product.
Where this comes from
- family npgsweb.ars-grin.gov ↗ GRIN page: Tropaeolum majus L.
- Most facts NC State Extension ↗ Backfilled by 0041. Pre-0041 rows recorded one source for the whole row; per-field attribution was never captured and is not invented here.
- toxicity NC State Extension ↗ toxic for cat, dog, horse from the page's "Problem for" listing.
- water frequency days Clemson HGIC ↗ Clemson HGIC "Growing Annuals": "Most annuals need at least 1 to 1½ inches of water per week from rain or irrigation." and "Allow the soil surface to dry before watering again." This is the factsheet's general guidance for annual flowers, not a figure published for this plant.