Caragana frutex aka Russian Peashrub

Caragana frutex, or Russian peashrub, belongs to the bean family. Its native range runs from Bulgaria east to Xinjiang, China. This range includes parts of Russia and Central Asia. It grows in grasslands, dry slopes, and riverside terraces. It also occurs at forest edges and within some forests. This woody shrub sheds its leaves each year. It has an upright form with several stems.

Garden plants reach 2–10 feet [0.6–3.05 metres] tall. Listed widths range from 2–6 feet [0.6–1.83 metres]. One account describes plants almost as wide as their height. Growth is slow, and the plant needs little upkeep. Young stems and bark are green, then turn gray. Pale horizontal lenticels mark the bark. The straight stems have a round cross section. Leaves grow alternately along them, each with four leaflets. These have smooth edges and rounded or slightly notched tips. The green leaves turn yellow before falling in autumn.

Yellow, pea-shaped flowers provide the main spring display. NC State places flowering in May and June. Chicago Botanic Garden lists a broader March to June season. Flowers measure about half an inch to an inch across. Most grow alone, though small groups may also form. Pods follow the flowers and add interest in autumn. They change from green to brown as they mature. Each pod measures about 1.5–2 inches long. It holds three to five seeds and splits when ripe. Growers can raise new plants from seed.

Full sun and freely drained soil suit this shrub best. Chicago Botanic Garden also lists partial shade as suitable. Sandy soil is preferred, though loam and rocky ground also work. It accepts acid, neutral, and alkaline soils. It tolerates drought, wind, salt, and poor ground. Root bacteria fix nitrogen, helping it grow without rich soil. Hot summers and cold winters suit its growth cycle. Sources list USDA zones 2–7 and 3–9. Dormant plants can withstand at least −30°C. Early shoots may suffer from late frosts in maritime climates.

Russian peashrub serves as a hedge, screen, or barrier. It also helps hold soil on sunny slopes. Nitrogen fixation can help improve poor soil. NC State reports no major pest or disease problems. Plants For A Future lists no known medicinal uses. That source reports no known hazards, but this does not prove safety. It suggests pods might be edible without confirming species-specific use. The evidence therefore does not establish this shrub as a food plant.