Vine · Sonoran native
Baja Passionflower
Passiflora foetida var. arizonica · Passifloraceae (passionflower family)
Also called: Arizona Passionflower, Fetid Passionflower, Stinking Passionflower, Love-in-a-Mist, Corona de Cristo
Baja Passionflower (Passiflora foetida var. arizonica) is a low-water vine native to the Sonoran Desert region well suited to Tucson and the low desert. It thrives in full sun to part shade, with a fast (warm season) growth rate.
Baja Passionflower at a glance
- Water use
- Low (established)
- Sun
- Full sun to part shade; naturally grows scrambling through desert shrubs in grassland and riparian margins.
- Mature size
- 6-10 ft H/W (slender herbaceous to semi-woody climbing/scrambling vine with tendrils)
- Growth rate
- Fast (warm season)
- Bloom
- White to pale lavender/purple petals with a banded corona; flowers cradled in feathery, fringed (lacy) bracts., Summer into fall, especially after monsoon rains (July-October)
- Cold hardiness
- Root-hardy to about 20°F (USDA zone 9-11); a warm-season grower that dies back in winter and resprouts after frost.
- Soil
- Well-drained native desert soils, including rocky and sandy ground; drought-adapted and tolerant of poor soil.
- Native range
- Sonoran Desert of southern Arizona (Pima and Santa Cruz counties) and northwestern Mexico
- Best used as
- Native butterfly habitat/host plant, Naturalistic and pollinator gardens, Low scrambling cover through shrubs
- Wildlife
- Native larval host for Gulf fritillary and related fritillary butterflies; flowers attract native bees; the small fruit feeds birds. Foliage and bracts have sticky glandular hairs that trap small insects (protocarnivory).
- Toxicity
- Crushed foliage emits a fetid (musky) odor; leaves contain cyanogenic compounds and are not for consumption, though the small ripe fruit is edible. Generally regarded as low-risk in the landscape.
How to grow Baja Passionflower in Tucson & the low desert
Watering
Drought-tolerant once established; supplemental deep watering during dry spells and monsoon season encourages bloom and fruit. Tends to die back if monsoon moisture is scarce.
Fertilizer & nutrients
Very low needs; thrives in lean native soil. A light spring feeding or compost topdressing is sufficient and usually unnecessary.
Pruning & care
Little pruning needed; cut back frost-killed and tangled growth in late winter. Allow it to scramble naturally through shrubs or over a low trellis.
Notes
Rare in cultivation and in the wild; one of Arizona's few native passionflowers. Often now treated as the species Passiflora arizonica; the name Passiflora foetida var. arizonica remains a valid synonym. Valued for habitat and conservation plantings rather than showy display.
Sources: Southwest Desert Flora (Passiflora foetida var. arizonica); NatureServe Explorer; Arizona-Sonora Desert Museum / Spadefoot Nursery (native Arizona passionvines); University of Arizona Cooperative Extension