Phacelia congesta
blue curls
Texas, the southwestern United States, and northern Mexico
SunFull Sun – Part Shade
Overview
Phacelia congesta is a winter annual or short-lived biennial in the borage family (Boraginaceae), growing 1-3 feet (30-90 cm) tall on branched, hairy stems. The gray-green leaves are pinnately divided into toothed lobes and covered, like the stems, in soft glandular hairs that can irritate sensitive skin. The flowers are carried in tightly coiled clusters that uncurl as they open, a form that gives the plant the common name blue curls. Each flower is about 0.2-0.3 inch (5-8 mm) wide, lavender to blue-violet, with long stamens that extend well beyond the petals and give the cluster a fuzzy look. Blooming in spring, the flowers draw large numbers of bees and other pollinators. P. congesta grows on rocky slopes, road banks, brushland, and disturbed ground across central and western Texas, New Mexico, and northern Mexico, often appearing in masses after a wet winter. It germinates in fall or winter, flowers in spring, and dies as the soil dries in early summer. Being annual, it leaves no growth after seed set and depends on reseeding to return.
Native Range
Native to central and western Texas, New Mexico, Arizona, and northern Mexico. It grows on limestone and rocky slopes, road cuts, brushland, canyon edges, and disturbed open ground, often in large stands following wet winters.Suggested Uses
Grown in native, pollinator, and wildflower gardens and in roadside and rangeland seed mixes across Texas and the Southwest. The spring flowers support many native bees, honeybees, and other insects. Its reseeding habit suits naturalized meadow plantings rather than formal beds.How to Identify
Appearance
Size & Dimensions
Height1' - 3'
Width/Spread10" - 1'6"
Colors
Foliage Colors
Bloom Information
Flowers in spring, mainly March through May, with the coiled clusters opening progressively from the base so bloom continues for several weeks. Flowering is heaviest after a wet fall and winter. Bloom ends as warm, dry weather sets in and the plant goes to seed.
Detailed Descriptions
Flower Description
lavender to blue-violetFoliage Description
gray-greenGrowing Conditions
Sun Requirements
Requires 6-12 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Water & Climate
Water Needs
Drought Tolerance
Drought tolerant when established
Care & Maintenance
Care Guide
Phacelia congesta grows in full sun to part sun on dry, well-drained rocky, sandy, or loamy soils with a pH near 6.5 to 8.0, including shallow soils over limestone. It is drought tolerant and grows on winter and spring rainfall, needing no irrigation. Rich or wet soil produces weak, floppy growth and shortens its life. It reseeds readily and returns from seed each year where the ground stays open. The glandular foliage can cause skin irritation, so it is handled with bare contact limited. Sown from seed in fall, it establishes a rosette over winter and flowers the following spring.Pruning
No pruning is needed for this short-lived plant. Spent stalks can be cut once flowering finishes and seed has set. Leaving some seed heads to ripen and drop maintains the stand from year to year.⚠️ Toxicity Warning
UnknownPlanting Guide
Planting Methods & Timing
Planting Method
direct sow
Direct Sow Timing
fall
Plant Spacing
12 inches