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Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Macroptilium atropurpureum
Also known as : Purple Bean Bush, Cowpea, Siratro, Atro
Hardiness Zones
Hardiness Zones
9 to 11
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Key Facts About Purple bushbean

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Attributes of Purple bushbean

Lifespan
Perennial
Plant Type
Herb
Bloom Time
Spring, Summer, Fall
Plant Height
2 m to 5 m
Spread
5 m
Flower Size
1.5 cm to 2.5 cm
Flower Color
Purple
Red
Brown
Leaf type
Semi-evergreen
Ideal Temperature
20 - 38 ℃
Growth Season
Spring, Summer
Growth Rate:Rapid
During Spring and Summer, purple bushbean's growth rate is noticeably rapid. This swift development sees an impressive surge in leaf production and stem elongation, supporting quick height increase. Flowers too appear promptly, responding to this intensified expansion rate. This growth pace subsides in other seasons, underlining purple bushbean's notable season-dependent growth strategy.

Scientific Classification of Purple bushbean

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distribution

Distribution of Purple bushbean

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Habitat of Purple bushbean

Pastures
Northern Hemisphere
South Hemisphere

Distribution Map of Purple bushbean

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Questions About Purple bushbean

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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Purple bushbean?
When watering the Purple bushbean, you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the Purple bushbean comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
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What should I do if I water my Purple bushbean too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Purple bushbean, but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the Purple bushbean, as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your Purple bushbean have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Purple bushbean. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your Purple bushbean grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your Purple bushbean is receiving too little water, all you need to do is water more regularly until those signs have subsided.
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How often should I water my Purple bushbean?
If your plant is in a pot. The most precise way to decide whether your Purple bushbean needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water. If you grow your Purple bushbean outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Purple bushbean can show an admirable ability to withstand drought.
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How much water does my Purple bushbean need?
When it comes time to water your Purple bushbean, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
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How should I water my Purple bushbean at different growth stages?
The water needs of the Purple bushbean can change depending on growth stages as well. For example, when your Purple bushbean is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your Purple bushbean will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your Purple bushbean will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your Purple bushbean more water at this time.
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How should I water my Purple bushbean through the seasons?
The Purple bushbean will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your Purple bushbean will contract a disease.
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What's the difference between watering my Purple bushbean indoors and outdoors?
It is most common to grow the Purple bushbean indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your Purple bushbean to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your Purple bushbean very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.
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More Info on Purple Bushbean Growth and Care

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Basic Care Guide
Transplant
18-24 inches (45-60 cm)
The optimal time to transplant purple bushbean is when the warmth of late spring kisses the soil, transitioning into early summer's embrace. Choose a well-drained, sunny spot and remember, gentle handling of roots during the move ensures a seamless adjustment.
Transplant Techniques
Temperature
0 - 43 ℃
Purple bushbean hails from environments with a temperature range of 68 to 100.4 °F (20 to 38 ℃). Its temperature preferences lean towards the warmer side, particularly in growth periods. Adjustments to cold weather may be required in winter.
Temp for Healthy Growth
Pruning
Spring, Summer
A perennial legume, purple bushbean thrives in warm climates and exhibits vining growth. Prune in spring or early summer to maintain shape and promote healthier, bushier growth. Cut back leggy stems and remove any dead or diseased foliage. Regular pruning encourages air circulation and reduces the risk of fungal infections, boosting pod production. By sustaining an open structure, plant vigor and longevity are enhanced. Always use clean, sharp tools for precise cuts.
Pruning techniques
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Plants Related to Purple bushbean

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Beardless rabbit's-foot grass
Beardless rabbit's-foot grass
Beardless rabbit's-foot grass (Polypogon viridis) is a perennial grass that is native to Eurasia and North Africa but has been widely introduced across North America. It grows well in aquatic conditions and will take root in marshy and sandy soil.
Beanweed
Beanweed
Beanweed, scientifically known as Pinguicula vulgaris, is native to most countries in Europe, the United States, Canada and Russia. The carnivorous plant has a purple flower and grows in damp habitats.
Bastardcedar
Bastardcedar
Bastardcedar (Guazuma ulmifolia) is a small tree native to areas in South and Central America, and the Caribbean. The species' wood has a lovely pale brown color and a pinkish heartwood. Due to its color and easy workability, it is used to make furniture and tool handles. The spiky, spherical fruits are important fodder for livestock in many places across the Caribbean.
Dalmatian toadflax
Dalmatian toadflax
Dalmatian toadflax is an invasive weed that can crowd out native and beneficial species of plants. It is a short-lived perennial with upright, yellow flowers. It takes five to six years to eradicate this weed from even small patches of land.
Baldwin's flat sedge
Baldwin's flat sedge
Baldwin's flat sedge is a vibrant, tall grass-like plant with dense clumps of slim, erect stems. Native to subtropical regions, it thrives near freshwater and boasts radiant, golden brown flower clusters. Unique, angular spikelets and triangular-shaped stems heighten its striking appeal. While its adaptation to aquatic settings make it highly resilient, these characteristics also lead to its identification as an invasive species in certain locales.
Awlfruit sedge
Awlfruit sedge
Awlfruit sedge (Carex stipata) is a grass native to Canada and the United States. Blooms in spring with green flowers that bloom along a flower stem. Attracts caterpillars and butterflies. Winter deciduous. Thrives in moist areas in shade to partial shade. Prefers loamy or clay soil.
Poison ivy
Poison ivy
In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.
Pokeweed
Pokeweed
Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.
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Related Plants
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Purple bushbean
Macroptilium atropurpureum
Also known as: Purple Bean Bush, Cowpea, Siratro, Atro
Hardiness Zones
Hardiness Zones
9 to 11
more
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plant_info

Key Facts About Purple bushbean

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Feedback
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Attributes of Purple bushbean

Lifespan
Perennial
Plant Type
Herb
Bloom Time
Spring, Summer, Fall
Plant Height
2 m to 5 m
Spread
5 m
Flower Size
1.5 cm to 2.5 cm
Flower Color
Purple
Red
Brown
Leaf type
Semi-evergreen
Ideal Temperature
20 - 38 ℃
Growth Season
Spring, Summer
Growth Rate:Rapid
During Spring and Summer, purple bushbean's growth rate is noticeably rapid. This swift development sees an impressive surge in leaf production and stem elongation, supporting quick height increase. Flowers too appear promptly, responding to this intensified expansion rate. This growth pace subsides in other seasons, underlining purple bushbean's notable season-dependent growth strategy.
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Scientific Classification of Purple bushbean

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distribution

Distribution of Purple bushbean

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Feedback
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Habitat of Purple bushbean

Pastures
Northern Hemisphere
South Hemisphere

Distribution Map of Purple bushbean

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
question

Questions About Purple bushbean

feedback
Feedback
feedback
Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Purple bushbean?
more
What should I do if I water my Purple bushbean too much or too little?
more
How often should I water my Purple bushbean?
more
How much water does my Purple bushbean need?
more
How should I water my Purple bushbean at different growth stages?
more
How should I water my Purple bushbean through the seasons?
more
What's the difference between watering my Purple bushbean indoors and outdoors?
more
icon
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Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
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More Info on Purple Bushbean Growth and Care

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Basic Care Guide
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Plants Related to Purple bushbean

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Temperature
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Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
Purple bushbean hails from environments with a temperature range of 68 to 100.4 °F (20 to 38 ℃). Its temperature preferences lean towards the warmer side, particularly in growth periods. Adjustments to cold weather may be required in winter.
Regional wintering strategies
Purple bushbean is extremely heat-loving, and any cold temperatures can cause harm to it. In the autumn, it is recommended to bring outdoor-grown Purple bushbean indoors and place it near a bright window, but it should be kept at a certain distance from heaters. Maintaining temperatures above {Suitable_growth_temperature_min} during winter is beneficial for plant growth. Any temperatures approaching {Tolerable_growing_temperature_min} are detrimental to the plant.
Important Symptoms
Symptoms of Low Temperature in Purple bushbean
Purple bushbean prefers warm temperatures and is not tolerant of low temperatures. It thrives best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, the leaves may lighten in color. After frost damage, the color gradually turns brown or black, and symptoms such as wilting and drooping may occur.
Solutions
Trim off the frost-damaged parts. Immediately move indoors to a warm environment for cold protection. Choose a spot near a south-facing window to place the plant, ensuring ample sunlight. Additionally, avoid placing the plant near heaters or air conditioning vents to prevent excessive dryness in the air.
Symptoms of High Temperature in Purple bushbean
During summer, Purple bushbean should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the color of the leaves becomes lighter, and the plant becomes more susceptible to sunburn.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun. Water the plant in the morning and evening to keep the soil moist.
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