Genista cinerea — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Genista cinerea

Genista Cinerea

Updated · 583 observations
ON THIS PLANT
A note from PlantMom

Silvery broom is disease-resistant and generally not prone to illnesses. Regarding care, this plant is fairly low-maintenance. When grown outdoors it needs minimal watering, and larger plants typically do not require pruning. Smaller plants should be pruned after they have finished blooming. Silvery broom is appropriate for anyone with an outdoor area, such as a garden or deck, and does not demand much care experience.

— PlantMom
CARE GUIDE

How to keep Genista Cinerea.

Light

Silvery broom does best in places with continuous sun and can also do well in areas with moderate shade. Coming from sunny habitats, the plant’s overall health can suffer from excessive shade, causing subpar growth and possibly stunted development.

Water

Silvery broom is a drought-tolerant plant that thrives in arid environments with very little moisture. Water it sparingly, about every 2 to 3 weeks, and make sure the soil dries out between waterings. This plant is ideal for xeriscaping, as it needs well-draining soil to prevent root rot and skillfully makes use of occasional rainfalls for growth.

Temperature

Silvery broom is native to mild climates where temperatures typically range from 59 to 90°F (15 to 32°C). It flourishes within that temperature range. To maintain healthy growth across seasons, keep the temperature within the plant's preferred range.

Fertilizer

The timing of fertilizing Silvery broom is important. Start in early spring and apply fertilizer monthly through early summer. Fertilizer encourages beautiful blooms and provides energy during both dormant periods and active growth.

Pruning

Silvery broom, easily recognized by its silvery leaves and yellow flowers, greatly benefits from being pruned once a year. Important techniques for pruning include removing dead branches and thinning out the plant to improve air circulation. This is best done from early to late winter, as it promotes healthy growth in the spring and increases the number of blooms.

CHARACTERISTICS

Botanical profile.

Plant Type
Shrub
Life Cycle
Perennial
Genus
Genista
Family
Fabaceae
Hardiness Zone
7
Mature Height
1.83 m to 2.44 m
Mature Spread
0.91 m to 1.52 m
Leaf Color
Green, Blue
Leaf Type
Evergreen
Flower Color
Yellow
Flower Size
1.02 cm to 1.27 cm
Bloom Time
Mid spring, Late spring, Early summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Mid summer, Late summer, Early fall
ALSO KNOWN AS

Other names.

en Ash-coloured broom en Silvery broom en Bush-crib en Broom
FREQUENTLY ASKED

Reader questions.

How should I water my Silvery broom plant?

Your Silvery broom is not particular about how you water it, so you can use any common watering tool. Watering cans, hoses, or even cups will all work fine. The important thing is to water the soil directly and make sure all areas are evenly moistened to provide water to the entire root system. Using filtered water is helpful because tap water can have harmful particles. It's also best to use water at or slightly above room temperature, as very cold or hot water can be a bit of a shock to the plant. However, the Silvery broom generally responds well to any type of water you give it.

Why should I feed my Silvery broom plant?

No matter which type of Silvery broom you own, regular fertilization is important for the plant's overall health. Providing the proper nutrients will promote stronger growth and make your Silvery broom more resilient to challenging conditions. It will also improve its ability to fight off diseases and pests. The foliage of the Silvery broom is one of its most attractive features, so it's essential to maintain it. To do this, follow a regular fertilization schedule specifically designed for your Silvery broom. This will encourage the development of vibrant, lush leaves with a deep color.

What are the sunlight requirements for Silvery broom plants?

Silvery broom plants need full sun, which is defined as more than 6 hours of sunlight a day, but they can also tolerate partial sun, about 3-6 hours of sunlight. It's important to observe how sunlight moves through your garden to place these plants in spots where they get a balance of light and shade, ensuring optimal growth and health. These plants originate from habitats with an abundance of sun and while they can survive in moderate shade, too much shading can affect their health, leading to poorer growth and potentially stunted development.

What are the ideal temperature conditions for Silvery broom?

Silvery broom is best suited to mild climates where temperatures range between 59 to 90°F (15 to 32°C), thriving within this temperature bracket for healthy growth across all seasons. It possesses considerable resistance to cold, needing no special frost protection measures in most cases. However, if winter temperatures are anticipated to fall below -15°C, protective measures like wrapping the plant with non-woven fabric or cloth are advisable. Additionally, watering the plant abundantly before the first autumn freeze to keep the soil moist can help counteract drought and water scarcity during winter and early spring.

What do I need to do if I give too much water or too little water to my Silvery broom?

Outdoor plants, particularly newly planted ones or seedlings, are susceptible to lack of watering. It is important to maintain regular watering for several months when the tree is small or recently planted. Once the roots are established, Silvery broom can rely on rain for most of its water needs. When Silvery broom is planted in pots, overwatering is a common issue. If you accidentally overwater your Silvery broom, take immediate action to address the situation. Stop watering the plant right away to minimize the impact of overwatering. Then, remove the Silvery broom from its pot to inspect the roots. If there are no signs of root rot, you can return the plant to its container. However, if root rot is present, trim any affected roots and apply a fungicide to prevent further damage. Finally, repot the Silvery broom in well-draining soil. In the case of underwatering, simply water the Silvery broom more frequently. Underwatering is easily addressed. When the plant is underwatered, its leaves may droop, dry out, and fall off. However, with sufficient watering, the leaves will quickly regain fullness. Make sure to correct your watering frequency as soon as you notice signs of underwatering.

What is the ideal time to fertilize my Silvery broom?

To ensure healthy growth of your Silvery broom, it is recommended to fertilize it in late winter or early spring. This provides the plant with essential nutrients to thrive when the weather warms up. If you live in a warm climate region, it can be beneficial to give an additional fertilizer feeding in early fall. This not only adds nutrients for the following growing season but also helps the plant withstand winter cold and prevent foliage damage. Fertilizing earlier in the year will allow enough time for new branches to grow and withstand the cold winter.

How can artificial lighting be used for indoor Silvery broom plants?

Indoor Silvery broom plants benefit from adequate lighting to ensure optimal growth, especially when natural sunlight is not enough. During winter or in less sunny spaces, artificial lights can be crucial for promoting healthy growth. Using LED lights is recommended because they can provide specific wavelengths needed by the plants. Full sun plants require 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants require 10-20W/sq ft. The light source should be placed 12-36 inches above the plant, mimicking natural sunlight as closely as possible. Most plants need 8-12 hours of light per day to thrive.

How should I care for Silvery broom in low temperatures?

Silvery broom displays a good degree of cold tolerance, optimally growing when temperatures stay above 15°C and should ideally not drop below -10°C. Exposure to temperatures beneath -15°C doesn't cause immediate visible harm during winter, but by spring, it may lead to brittle, dry branches with no new shoots appearing. To manage this, it's recommended to prune away any dead branches that fail to produce new leaves come spring.

How often do I need to water my Silvery broom?

Most plants can grow naturally with rainfall, but if your area lacks rain, you should water your plants every 2 weeks in spring and fall, more frequently in summer, and less in winter. If your Silvery broom is young or newly planted, you should water it more frequently to help it establish. For potted plants, there are two main ways to determine how often to water your Silvery broom. One way is to set a predetermined watering schedule, but this may not consider the unique conditions of your growing environment. Another way is to observe the moisture in the soil and water when the top few inches are dry.

When is the best time to not fertilize my Silvery broom?

There are specific times of the year when you should avoid fertilizing your Silvery broom. The first is during the winter months when the plant is dormant and doesn't need any feeding. Fertilizing during this time is not recommended. It is also not advisable to fertilize during late spring and all of summer because the weather tends to be hotter and drier. These conditions can have a negative impact on your Silvery broom if fertilized. To prevent any problems, it's best to stick to a fertilization schedule that includes feeding in early spring and early fall only.

What symptoms indicate Silvery broom plants are not getting enough light?

When Silvery broom plants don't receive adequate sunlight, they may exhibit several symptoms. New leaves might grow smaller, and the plant could exhibit leggy or sparse growth, with increased spaces between leaves or stems. There might be faster leaf drop as the plant tries to conserve resources, leading to slower or halted growth. Leaves may also develop lighter colors or show signs of chlorosis, where they lose their green color and turn yellow. Excessive sunlight can cause symptoms like sunscald, leaf curling, wilting, and leaf scorching. These symptoms indicate the plant is struggling with the current light conditions.

What care does Silvery broom require in high temperatures?

During the summer months, keeping Silvery broom's surrounding temperature below 32°C is crucial. Should temperatures rise above 35°C, the plant's leaves may lighten in color and its tips could become dry and withered, increasing susceptibility to sunburn. To alleviate these issues, trim away any sunburned or dried parts of the plant. Additionally, moving the plant to a shaded area during peak sun hours or employing a shade cloth can protect it. It's also beneficial to water the plant in the early morning and late evening to maintain soil moisture.

PLATES
Genista cinerea leaf
PLATE 01 · leaf
Genista cinerea leaf
PLATE 02 · leaf
Genista cinerea flower
PLATE 03 · flower
Genista cinerea flower
PLATE 04 · flower
Genista cinerea fruit
PLATE 05 · fruit
Genista cinerea fruit
PLATE 06 · fruit
ALSO IN THE LIBRARY

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