PlantFiles is getting a new look! Just in time for spring, we're rolling out a new look for the best online plants database. It will also work with your smart phones and mobile devices, so now you can take it with you on garden center visits or botanical garden tours. Questions or comments? Please post them here.

Seedbox, Bushy Waterprimrose
Ludwigia alternifolia

Family: Onagraceae (on-uh-GRAY-see-ee) (Info)
Genus: Ludwigia (lud-WIG-ee-uh) (Info)
Species: alternifolia (al-tern-ee-FOH-lee-uh) (Info)




24-36 in. (60-90 cm)


Unknown - Tell us


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Sun to Partial Shade


Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall


Good Fall Color

Other details:

May be a noxious weed or invasive

Very high moisture needs; suitable for bogs and water gardens

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds


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

Villa Rica, Georgia

Cole Camp, Missouri

Frenchtown, New Jersey

Summerville, South Carolina

Memphis, Tennessee

Spring, Texas

show all

Gardeners' Notes:


On Jan 3, 2009, htop from San Antonio, TX (Zone 8b) wrote:

I have not grown nor observed this plant. Ludwigia alternifolia is native to Texas and other states.


On Sep 14, 2008, poppy23 from Memphis, TN wrote:

This beautiful native wildflower came up on its own in several of my perennial beds this year. I pulled some of them out, but let a few others stay, to see what they would do, and I'm so glad that I did! The plant produces small but beautiful bright yellow flowers, and attractive seedpods. It is also a host plant for the banded sphinx moth (Eumorpha fasciatus), so I now have several very colorful, large, red-green-black-&-white caterpillars on the plants. I've collected seeds to give to friends now!


On Jul 17, 2008, claypa from West Pottsgrove, PA (Zone 6b) wrote:

This is a U.S. native plant that has only been reported as invasive in Puerto Rico, nowhere else.


On Jul 16, 2008, creekwalker from Benton County, MO (Zone 5a) wrote:

Also called False Loosestrife. Missouri Wildflowers says it does well as a garden subject and seeds freely.