Ipomopsis aggregata aka Scarlet Gilia

Ipomopsis aggregata belongs to the Polemoniaceae family. Gardeners call it scarlet gilia or skyrocket gilia. Gilia aggregata is an older scientific name. Its native range runs from western Canada to northern Mexico. It grows across much of the western United States. It is not native to Britain or Ireland. The species occurs in temperate regions.

This plant grows as a biennial or short-lived perennial. It grows slowly, reaching about 3.3 feet (1 metre) tall. Its spread reaches about 1 foot (0.3 metres). The species varies in form. Its leaves have a musky scent. Crushing them releases a smell compared with a skunk's. Flowers appear from June to July. Each flower has both male and female organs. The flowers also hold nectar, which has a recorded food use.

In the wild, it grows on dry, rocky slopes. Habitats include sagebrush, scrub, and open spaces in pine woods. In California, it reaches elevations near 9,840 feet (3,000 metres). In gardens, it needs soil that drains very well. Sandy or loamy soil suits it. It accepts mildly acid, neutral, and mildly alkaline conditions. Full sun is the clearest choice for cultivation. One account also allows partial shade, but not deep shade. The soil may be dry or moist, provided water drains freely.

Plants For A Future lists USDA hardiness zones 6–9. It also reports cold tolerance near 5°F (−15°C). Wet winters pose a separate risk, since plants can rot. That source suggests overhead glass protection where winters are wet. It lists the species for cultivated beds. Its scented leaves add another point of garden interest. Seed can be sown directly in place in spring. Its slow growth and short life are worth considering when planting.

Recorded food uses include flower nectar and tea from the plant. Plants For A Future reports no known hazards. That does not establish safety for every person or pet. The same source records medicinal uses that cause vomiting or purging. Other traditional uses include skin washes and poultices for sore joints. These records do not establish that such treatments work. People have also boiled the plant to make glue. Its reported saponins suggest possible use as a soap substitute. Historical washing uses include the face and hair.