Photo by Melody
It's time now to VOTE in our 14th annual photo contest! Voting ends November 7, so be sure to cast your votes for your favorites in each category here. Good luck to all contestants!

PlantFiles: Nasturtium
Tropaeolum majus 'Cobra'

Family: Tropaeolaceae
Genus: Tropaeolum (tro-PEE-oh-lum) (Info)
Species: majus (MAY-jus) (Info)
Cultivar: Cobra

Tropicals and Tender Perennials

24-36 in. (60-90 cm)

15-18 in. (38-45 cm)

USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade


Bloom Color:
Scarlet (Dark Red)

Bloom Time:
Blooms all year


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

Click thumbnail
to view:

By dicentra63
Thumbnail #1 of Tropaeolum majus by dicentra63

By dicentra63
Thumbnail #2 of Tropaeolum majus by dicentra63


1 positive
No neutrals
1 negative

Gardeners' Notes:

Positive jccravey On May 8, 2011, jccravey from Lawtey, FL wrote:

Had about average germination for nasturtiums (>50%). Plants are doing well. Blooms are beautiful against blackish leaves.

Negative dicentra63 On Oct 23, 2010, dicentra63 from West Valley City, UT (Zone 6b) wrote:

As many noted in the Products and Sources forum for Thompson and Morgan, the germination rate for "Cobra" is abysmal. I planted 15-21 seeds in part-shade hanging baskets and got three germinations.

Furthermore, the foliage was pale green and sickly (possibly didn't get enough sun) and not at all like the magnificent specimen in the photo.


This plant has been said to grow in the following regions:

Fernandina Beach, Florida

We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2014 Dave's Garden, an Internet Brands company. All Rights Reserved.

Hope for America