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Sundrops, Texas Primrose, Berlandier's Sundrops

Calylophus berlandieri

Family: Onagraceae (on-uh-GRAY-see-ee) (Info)
Genus: Calylophus (kal-ee-LOW-fus) (Info)
Species: berlandieri (bur-lan-dee-ER-ee) (Info)
Synonym:Calylophus berlandieri subsp. berlandieri
Synonym:Calylophus drummondianus subsp. berlandieri


Alpines and Rock Gardens


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:

Suitable for growing in containers


6-12 in. (15-30 cm)


15-18 in. (38-45 cm)

18-24 in. (45-60 cm)


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)

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

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

Sun Exposure:

Full Sun


Unknown - Tell us

Bloom Color:

Bright Yellow

Chartreuse (Yellow-Green)

Bloom Time:

Late Winter/Early Spring

Mid Spring

Late Spring/Early Summer





Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

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


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

Ventura, California

Haiku, Hawaii

Raleigh, North Carolina

Arlington, Texas

Austin, Texas

Fort Worth, Texas

Garland, Texas

Helotes, Texas

Keller, Texas

Liberty Hill, Texas

Linden, Texas

San Antonio, Texas

Virginia Beach, Virginia

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Gardeners' Notes:


On Sep 21, 2012, koa from Haiku, HI wrote:

I LOVE this plant! I have a spot where nothing would grow. It is under a clump of fishtail palms which have very aggressive roots. It gets part sun and part shade, and drains almost too well. Although we get a fair amount of rain here, this particular spot is on a slope, the soil drains like it's gravel, and there is a lot of competition from the palms. Everything else I've tried there has struggled or died, even though I tried my most reliably tough plants. I planted these and they have thrived. They have not stopped blooming. If I had the money I'd plant the whole lot with them and have a sea of yellow blooms. ;-)


On May 10, 2011, postpunkgirl from Keller, TX wrote:

This plant grows in my full, blazing hot, west-facing garden... I planted two, gallon-size containers of this plant 3 yrs ago and they have spread to their full capacity (2 to 3 feet.) I hardly ever water them and they are placed on a slight slope. Everyone in my neighborhood comments on how beautiful and eye-catching they are! Truly the most carefree plant I have! I want more!


On Mar 1, 2007, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Sundrops, Texas Primrose, Berlandier's Sundrops Calylophus berlandieri is Native to Texas and other States.