Chuparosa.

Identification

Chuparosa (Justicia californica) is a small to medium shrub, 3–6 feet tall and 4–6 feet across, with thin gray-green stems and small leaves that drop during the hottest stretch of summer. The flowers are the distinctive feature: brilliant scarlet tubes 1–1.5 inches long, produced in clusters from October through May with a peak in February and March. Flowers persist long enough to provide a critical winter nectar source for Anna's hummingbirds and Costa's hummingbirds in Tucson, both of which overwinter in residential yards.

The shrub is sometimes called "hummingbird bush" in nursery trade. We avoid that name on principle; the Spanish name predates any English nickname by centuries and is still in everyday use among Tucson's older Mexican-American community.

Range & ecology

Native range is the lower Sonoran Desert from southern Arizona to Baja California and northwestern Sonora. The species naturally inhabits washes and desert dry-streambeds, where it experiences brief inundation during monsoon followed by long dry intervals. This makes it an unusually good match for a residential yard receiving AC condensate: a small constant trickle of cool clean water that mimics the species' preferred groundwater-fed condition without ever creating standing water.

The flowers support multiple specialist nectar feeders. Audubon Arizona documents that residential chuparosa plantings extend the wintering range of Costa's hummingbird north into Tucson — a small but real piece of conservation work the homeowner is doing without intending to.

Water budget

Mature chuparosa needs 2–4 gal/wk in summer and effectively 0 in winter. The plant tolerates extended drought by going semi-deciduous, recovering fully when water returns. Over-watering produces leggy growth that doesn't flower well. The species is unusually easy on an AC condensate line: the typical 4-ton system delivers 12–20 gallons per day on a hot day, and a single chuparosa under the line uses 0.6 gallons per day at most, with the excess flowing past to a basin under a larger plant downhill.

Planting notes

We plant 1-gallon stock from Desert Survivors in October, March, or April. Hole one and a half times the rootball width, native soil, no amendments. Pinch back any leggy growth in May to encourage branching. Cut back hard (to 12–18 inches) every 4–5 years if the plant gets woody and floppy; recovery is fast. The species self-seeds modestly in basins; volunteer seedlings transplant easily during their first six months.

Subsystem pairing

Chuparosa pairs primarily with COND-1 (AC condensate), where it serves as both a receiving plant and a "tell": if the chuparosa under the line stops flowering, the line is plugged. We almost always plant one within 4 feet of an AC condensate outlet on the south or east elevation of the house, where it gets morning sun, afternoon shade from the house wall, and a slow daily trickle that more or less matches its preferred conditions in the wild.

The species pairs less well with EARTH-1 alone — basin water is too pulse-driven for steady chuparosa flowering. We do plant it on the rim of greywater basins, where occasional moisture from the outlet keeps the plant flowering through summer.