Black Broom Cytisus nigricans 'Cyni'

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
black-rooted broom 'Cyni'


The plant commonly known as Black Broom or Cytisus nigricans 'Cyni' has a distinctive appearance that comprises various features. Its branches are typically covered with small green leaves that may have a slightly grayish tone, giving the plant a fine-textured visual character. During the blooming season, it produces an abundant display of vibrant yellow flowers, which are quite striking against the green backdrop of the foliage. These blooms are pea-shaped, a characteristic appearance for flowers in this plant group, and they are often clustered together, creating dense, eye-catching clusters. The overall visual effect of the Black Broom during flowering is quite ornamental, making it a popular choice in garden settings for its color and form. Despite this description, details concerning the specific size of the plant, in terms of its dimensions, are not provided here.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Black Broom, Austrian Broom, Blackwood Broom.

    • Common names

      Cytisus nigricans 'Cyni'.

  • skullToxicity

    • To humans

      The plant commonly known as broom is considered to have a level of toxicity to humans. If ingested, parts of the broom plant can lead to various symptoms of poisoning such as nausea, vomiting, and diarrhea. In severe cases, it can cause heart problems and convulsions. It is advised that humans avoid consuming any part of the broom plant due to these potential health risks.

    • To pets

      The broom plant also poses a risk of toxicity to pets. Ingestion of the plant can result in similar symptoms to those experienced by humans, such as gastrointestinal upset including vomiting and diarrhea. More severe reactions may involve heart issues and possibly seizures. Pet owners should prevent their animals from ingesting any part of the broom plant to avoid these possible consequences.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      3-4 feet (0.91-1.22 meters)

    • Spread

      3-4 feet (0.91-1.22 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Landscape Ornamentation: Cytisus nigricans 'Cyni', also known as Black Broom, adds vibrant yellow flowers to gardens, which can enhance the aesthetic appeal of the landscape.
    • Drought Resistance: Black Broom is known for its ability to withstand periods of drought, making it suitable for xeriscaping and low-water gardens.
    • Erosion Control: Its root system helps stabilize soil on slopes, preventing erosion.
    • Wildlife Attraction: The flowers attract pollinators such as bees and butterflies, supporting local biodiversity.
    • Low Maintenance: Black Broom is relatively easy to care for and does not require frequent watering or fertilization once established.
    • Fast Growth: It grows quickly, which can be advantageous for creating screens or hedges in a short amount of time.
    • Nitrogen Fixation: As a member of the legume family, it has the ability to fix nitrogen in the soil, improving soil fertility for other plants in the vicinity.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Dye Production: The plant can be used to produce yellow dyes due to the presence of natural pigments in its flowers and stems.
    • Tannin Source: Cytisus nigricans 'Cyni' contains tannins in its bark and leaves, which can be used in the leather tanning process.
    • Soil Stabilization: Because of its robust root system, it is often planted to prevent soil erosion on slopes and embankments.
    • Biomass Fuel: The dense growth of Cytisus nigricans 'Cyni' makes it a potential source of biomass for renewable energy production.
    • Insect Repellent: The aromatic properties of the plant can repel certain insects, making it a useful companion plant in gardens.
    • Garden Ornamental: Often used in landscaping for its bright flowers and as a border plant due to its compact growth habit.
    • Livestock Bedding: The branches and leaves, when dried, can provide bedding material for livestock, offering a comfortable and absorbent resting place.
    • Intercropping: Used in agricultural systems among crops to improve soil nitrogen levels, as it is a legume capable of fixing nitrogen.
    • Natural Fencing: Its dense growth can form an effective hedge or natural barrier for property lines or to enclose livestock areas.
    • Photographic Subject: The vibrant yellow flowers make it a popular subject for photography, especially in natural landscape settings.

Interesting Facts

  • bedFeng Shui

    The Black Broom is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Black Broom is not used in astrology practice.

  • spiralPlant Symbolism

    • Protection: The Black Broom or Cytisus nigricans 'Cyni' is often associated with protection. In folklore, brooms were believed to ward off evil spirits and negative energies.
    • Humility: Throughout history, brooms have been tools for the common household suggesting humility and service, symbolizing the virtue of being grounded and humble.
    • Purification: Black Broom is sometimes used in rituals or ceremonies as a symbol of purification, utilized in clearing spaces of negativity much like its practical use in cleaning.
    • New Beginnings: Since brooms are associated with cleaning, they naturally come to represent sweeping away the old to make room for new beginnings and fresh starts.

Every 1-2 weeks
2500 - 10000 Lux
Every 2-3 years
Spring to early summer
As needed
  • water dropWater

    The Black Broom (Cytisus nigricans 'Cyni') prefers to be watered infrequently but deeply to encourage strong root growth. It is important to let the soil dry out between waterings. During the growing season, watering once every 1 to 2 weeks with approximately 1 gallon of water should be sufficient, depending on the weather conditions. In hotter, drier periods, you may need to water more often, ensuring that the soil doesn't stay soggy. In the winter months, reduce watering to once a month or less, as the plant is dormant and requires less moisture.

  • sunLight

    The Black Broom thrives in full sun exposure. It should be placed in a location where it can receive at least 6 to 8 hours of direct sunlight daily. Avoid shaded areas as insufficient light can lead to poor flowering and leggy growth. The ideal location is one that mimics its natural Mediterranean environment, offering ample sunshine.

  • thermometerTemperature

    The Black Broom is adapted to a Mediterranean climate and favors a temperature range typically between 50°F and 75°F. While it can withstand temperatures as low as 20°F, it's important to protect it from extreme cold. It is most vigorous and blooms best when the temperature stays within the ideal range, but it can adapt to warmer temperatures as long as the other conditions like watering and light are met.

  • scissorsPruning

    Pruning Black Broom is essential to maintain its shape and promote healthy growth. Pruning should be done just after flowering, typically in late spring or early summer, to encourage new growth and flower bud formation for the next season. Cut back the flowering stems by about one-third, and remove any dead or diseased wood. Avoid heavy pruning as this can damage the plant.

  • broomCleaning

    Not needed

  • bambooSoil

    Austrian Broom (Cytisus nigricans 'Cyni') thrives in well-draining sandy to loamy soil, enriched with organic matter. A pH between 6.0 and 7.5 is ideal. Amend the soil with compost before planting to improve fertility and structure.

  • plantRepotting

    Austrian Broom rarely needs repotting as it is primarily grown outdoors and develops deep roots. Repot young plants every 2-3 years to encourage growth.

  • water dropsHumidity & Misting

    Austrian Broom prefers a dry to moderate humidity environment and is quite tolerant of low humidity levels, making it well-suited for most outdoor conditions.

  • pinSuitable locations

    • Indoor

      Place in bright, indirect light and avoid overwatering.

    • Outdoor

      Plant in full sun with well-draining soil; water sparingly.

    • Hardiness zone

      6-9 USDA

  • circleLife cycle

    The Cytisus nigricans 'Cyni', commonly known as Black Broom, begins its life as a seed, typically germinating in the spring after a period of cold stratification, which breaks the seed's dormancy. Once germinated, the seedling grows into a small shrub, establishing a root system and producing compound leaves. During its vegetative stage, the plant focuses on growth and the development of woody stems. After a few years, when mature, Black Broom enters its reproductive stage, producing bright yellow, pea-like flowers in late spring to early summer that are pollinated by bees and other insects. Following pollination, the flowers develop into small pods, which eventually dry and release seeds, ensuring the continuation of the species. The plant may live for several years, with some individuals reaching up to 10 years, and throughout its life it undergoes seasonal dieback in colder climates, regrowing from the base in the following growing season.

  • sproutPropogation

    • Propogation time

      Spring to early summer

    • Propogation: Cytisus nigricans 'Cyni', commonly known as Black Broom, is a shrub that is often propagated by seed. The most popular method of propagation for this plant is through the sowing of seeds. Seeds should be sown in the fall in a cold frame or a sheltered outdoor bed. The seeds require a period of cold stratification to break dormancy, so the cool temperatures of autumn into winter help achieve this naturally. Once germinated in the spring, the seedlings can be transplanted into individual pots when they are large enough to handle and then later moved to their final growing location. It is important to keep in mind that seed propagation can result in some variability in the offspring.