Mexican Loosestrife

Cuphea aequipetala

Family: Lythraceae (ly-THRAY-see-ee) (Info)
Genus: Cuphea (KYOO-fee-uh) (Info)
Species: aequipetala (eek-wee-PET-uh-luh) (Info)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round


12-18 in. (30-45 cm)


24-36 in. (60-90 cm)

36-48 in. (90-120 cm)


USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Light Shade


Unknown - Tell us

Bloom Color:

Magenta (Pink-Purple)

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

Seed Collecting:

Unknown - Tell us


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

Richmond, California

Ridgecrest, California

San Anselmo, California

Vista, California

Gardeners' Notes:


On Sep 14, 2015, RoseLady2 from Ridgecrest, CA (Zone 8a) wrote:

Can be invasive in desert areas; the CA Mojave Desert has a major problem with purple loosestrife clogging moist areas.


On Sep 14, 2015, mensamom from Laurens, SC (Zone 7b) wrote:

This reportedly medicinal but rarely grown plant is an evergreen bush with small ovate to lanceolate leaves that can be used as a handsome ground cover on a steep or unstable slope or in the front of border in a shady area. The long blooming season of Cuphea aequipetala starts from early summer onwards and extends all the way to frost. Held on a red stalk, its purple flowers are small, but very profuse and rather popular with bumble bees. As with most Cupheas, each bloom has 6 petals, with the upper 2 being slightly bigger and touched by a hint of black. Even the floral tube is attractive -- maroon and green with little "hairs" sticking out. When all the petals have dropped, each tube looks like a strange spiky Iochroma, quite amusing. 2 feet tall and wide. Part shade. Rich, well-drained s... read more