Mountain kidney vetch 'Rubra' Anthyllis montana 'Rubra'

Water

Mountain kidney vetch should be watered moderately, allowing the soil to dry out slightly between waterings. Typically, this translates into watering once every week or two, depending on the climate and season, using about half a gallon of water for outdoor plants. For potted plants, adjust the amount to roughly 16 ounces per watering to prevent waterlogging. During hot, dry periods, you may need to water more frequently, but always check the soil moisture before adding more water. Over-watering can lead to root rot, so it's vital to ensure good drainage and avoid letting the plant sit in water.

Light

Mountain kidney vetch thrives best in full sun to partial shade. Ideally, place the plant in a spot where it receives at least six hours of direct sunlight each day. The bright light will help the plant produce its characteristic red flowers and maintain healthy growth. However, in regions with very intense sunlight, a location with afternoon shade can prevent possible scorching of the foliage.

Temperature

Mountain kidney vetch is hardy and can tolerate temperatures down to about 10°F, but it grows best in cooler climates with temperatures ranging from 50 to 75°F. It's important to protect the plant from extreme heat, so in regions where temperatures rise above 85°F, providing some afternoon shade can help mitigate heat stress. Winter hardiness is one of this plant's strengths, allowing it to survive temperatures well below freezing.

Pruning

Pruning mountain kidney vetch is important to maintain its shape and encourage denser growth. Prune after flowering by cutting back the spent flower stems and about a third of the plant's overall height. This should be done annually, typically in late summer or early fall. Pruning at this time helps to stimulate new growth and results in a more compact, bushy plant the following season.

Cleaning

As needed

Soil

Mountain Kidney Vetch prefers well-draining soil mixed with sand and gravel to mimic its native alpine conditions, with a pH ranging from neutral to slightly alkaline.

Repotting

Mountain Kidney Vetch does not require frequent repotting; it should be done every 2-3 years to refresh the soil or if the plant has outgrown its current pot.

Humidity & Misting

Mountain Kidney Vetch thrives in average to low humidity conditions and does not require specific humidity adjustments.

Suitable locations

• Indoor

  Ensure bright light, cool temps, and well-drained soil for Mountain Kidney Vetch.

• Outdoor

  Plant in full sun with well-draining soil for Mountain Kidney Vetch.

• Hardiness zone

  4-8 USDA

Life cycle

The life cycle of Anthyllis montana 'Rubra', commonly known as Red Kidney Vetch, begins with seed germination in spring, requiring stratification or a period of cold to break dormancy. Seedlings establish their root systems and produce a rosette of leaves close to the ground. As the plant matures, it develops flowering stems in late spring to early summer, showcasing its characteristic reddish-purple flowers that attract pollinators. After pollination, flowers give way to seed pods that mature by late summer. The plant then enters a period of dormancy during fall and winter, with the foliage dying back in colder climates. Red Kidney Vetch is a perennial, so it regrows from the same root system each year, completing its life cycle.

Propogation

• Propogation time

  Spring-Early Summer

• The most popular method of propagation for the Kidney Vetch (Anthyllis montana 'Rubra') is through seed sowing. This is typically done in late winter to early spring. The seeds should be sown in well-draining soil and lightly covered with soil, ideally no more than a quarter of an inch (about 6 millimeters). The flats or pots containing the seeds should be kept moist but not waterlogged, and placed in a warm area with plenty of indirect sunlight. Germination usually occurs within two to four weeks. Once the seedlings have grown enough to handle, they can be transplanted into individual pots or the garden. Kidney Vetch prefers well-drained soil and a sunny location and can be an excellent addition to rock gardens or borders.