Crotalaria trichotoma — a medium houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Crotalaria trichotoma

Crotalaria Trichotoma

Updated · 17 observations
ON THIS PLANT
A note from PlantMom

West indian rattlebox shows strong resistance to disease and is generally not easily affected by illnesses. Still, it can be vulnerable to pests and diseases present in its environment, though such infections are generally mild. For care, the plant needs moderate maintenance. It should be pruned regularly to preserve a tidy appearance and support healthy growth. Feeding the plant can also encourage it to flower. West indian rattlebox is appropriate for anyone with outdoor space, like a garden or patio, and does not demand extensive plant-care experience. It may need more attention when grown indoors.

— PlantMom
CARE GUIDE

How to keep Crotalaria Trichotoma.

Light

West indian rattlebox comes from bright, open environments and flourishes in full sun. It can tolerate partial sun but favors direct sunlight for optimal growth. This plant, which can be annual or biennial, is known for its sun-loving nature.

Temperature

West indian rattlebox comes from tropical regions, where the climate is generally warm and humid. Therefore, it is well adapted to high temperatures and humidity. It does not tolerate sudden temperature changes and prefers a stable temperature environment, so avoiding indoor temperature fluctuations is important. It usually cannot withstand cold and requires higher temperatures for growth. If the environmental temperature falls too low, the plant may stop growing or even die.

Fertilizer

When most of the West indian rattlebox's blooms have opened to full size, resume fertilizing. As blooms reach peak production, fertilize once every three to four weeks, weather permitting. Then, when the West indian rattlebox begins producing fewer new blooms, stop fertilizing; there's no need to fertilize when the plant can no longer produce more blooms.

Pruning

The West Indian rattlebox is known for its vibrant flowers and distinctive seed pods. To promote healthy growth and abundant flowering, it is recommended to prune the plant from early to late spring. Remove any dead branches and thin out overcrowded areas to improve air circulation, prevent legginess, and enhance its ornamental appeal. These practices are supported by reputable sources.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Annual
Genus
Crotalaria
Family
Fabaceae
Hardiness Zone
9-11
Mature Height
2.13 m
Mature Spread
0.49 m to 1.52 m
Leaf Color
Green
Leaf Type
Semi-evergreen
Flower Color
Yellow
Flower Size
20.32 cm
Bloom Time
Summer, Early fall, Mid fall
Planting Time
Spring, Summer
Harvest Time
Fall, Early winter, Mid winter
Native Area
Mozambique, Angola, Tanzania
ALSO KNOWN AS

Other names.

en Curara-pea en West Indian rattlebox en West Indies Rattlebox
FREQUENTLY ASKED

Reader questions.

How should I water my West Indian rattlebox plant?

There are various ways to water the West Indian rattlebox, such as using a garden hose with a spray nozzle or a watering can. It isn't too particular about the water source and can survive off rainwater, tap water, or filtered water. It's best to avoid watering from above to prevent damage to the leaves and flowers and reduce the risk of disease. Using a drip irrigation system is often the most effective method as it delivers water evenly and directly to the soil. For a West Indian rattlebox in a container, you can use a cup, watering can, or tap to water it directly at the soil.

How many hours of sunlight does West Indian rattlebox need each day to grow well?

In order to take care of the plants properly, it is important to provide them with 6 to 8 hours of sunlight per day. Particularly in the summer, they prefer to receive more light in the morning. The West Indian rattlebox, in particular, requires full sun and can benefit from as much sunlight as possible. By providing these species with ample light, they will be able to produce food, display stunning blossoms, and thrive.

What do I do if I give too much or too little water to my West Indian rattlebox plant?

To remedy underwatering West Indian rattlebox, simply water the plant more regularly when you notice it lacks moisture. Overwatering, on the other hand, can be more serious if not detected early. Overwatering can lead to diseases that cause the decline and death of the plant. To prevent this, choose a growing location with plenty of sunlight to dry the soil and good drainage to prevent water from pooling. If you accidentally overwater a potted West Indian rattlebox, consider repotting it in a new pot with loose soil and efficient drainage. Make sure the previous container had proper drainage or consider adding more drainage holes.

What kind of sunlight does West Indian rattlebox need?

The West Indian rattlebox thrives in sunny conditions. To ensure proper sun exposure, avoid overcrowding them and allow sunlight to reach all parts of the plant. If growing in pots, place them in windows with direct sun to ensure full sunlight, regardless of the time of year. Avoid partial or filtered light, as it can weaken stems and flowers. It is ideal for the West Indian rattlebox to always be exposed to the sun.

How frequently should I give water to my West Indian rattlebox?

To ensure the health of your West Indian rattlebox, it is important to water it regularly throughout the growing season. In the spring, watering once a week should suffice. However, as the weather gets warmer, you may need to increase the frequency to two to three times a week. It is crucial not to exceed this rate as it can harm the plant. Additionally, make sure the soil remains slightly moist without being overly wet, regardless of how often you need to water. If your West Indian rattlebox is in a pot, you will need to water it more frequently compared to if it was planted in the ground. This is because soil in pots tends to heat up and dry out faster. Typically, watering a potted West Indian rattlebox a few times a week is recommended, while for an in-ground plant, once a week is sufficient.

Is sunlight bad for plants? How can the West Indian rattlebox be protected from damage caused by sun and heat?

When the temperature exceeds 90℉(32℃), the West Indian rattlebox is prone to damage from extreme heat, especially if exposed to prolonged sunlight. To safeguard the plant during summer afternoons, it is advisable to provide some shade. Remember that the summer sunlight is stronger and lasts 50% longer than winter sunlight. If sunlight stress becomes an issue for the West Indian rattlebox, it is recommended to ensure they have sufficient hydration. Water the plant when the top 2 inches of soil become dry, and if the outside temperature is too hot, consider moving the plants indoors if they are in containers. It is normal for the plant leaves to wilt during the day, with recovery happening at night. However, if the West Indian rattlebox remains droopy, it indicates rapid water loss, and it is crucial to give them more water.

How much water does my West Indian rattlebox plant need?

There are a few ways to determine how much water to give your West Indian rattlebox plant. Some gardeners prefer to feel the soil to check for moisture, suggesting watering until the top six inches feel moist. Alternatively, you can use a set measurement of about two gallons per week, depending on the temperature and soil dryness. However, be cautious as strictly following these guidelines may lead to overwatering if your plant needs less water. When growing the West Indian rattlebox in a container, you need to use a different method. Water enough to moisten all the dry soil layers, which can be checked by sticking your finger in the soil or by observing a slight trickle of water from the drainage holes.

Should I make sure the West Indian rattlebox doesn't get too much sun?

The West Indian rattlebox thrives in sunny conditions and actually enjoys the sun. Some species are attracted to the sun and should be planted in south-facing gardens, where they can receive sun exposure from morning to afternoon. However, it's important to note that while the sun can be beneficial, some plants may be prone to sunburn. To protect against excessive afternoon and midday sun, you can provide shade from a tree or a wall. It is not recommended to grow the West Indian rattlebox in shady areas because the larger flowers require substantial energy to grow and bloom. For optimal results, always ensure that the plants receive adequate sunlight and place them in an area with full sun.

How do I know if I'm giving enough water to my West Indian rattlebox plant?

Avoiding overwatering your West Indian rattlebox can be somewhat challenging. On one hand, these plants have deep roots that need to be moistened weekly. On the other hand, they are highly susceptible to root rot and may develop browning if overwatered. Underwatering is less of a concern as these plants can survive without additional watering for some time. However, if you wait too long to give them water, they may begin to wilt and the leaves may become dry.

What will happen if West indian rattlebox doesn't get enough sunlight?

The West Indian rattlebox needs sufficient sunlight for its photosynthetic process to function properly. If it doesn't get enough sun or is placed in shady areas, its growth will be affected. The stems may become long and thin as they try to reach for more sunlight, resulting in a leggy appearance. Additionally, these plants won't bloom or produce seeds when deprived of sunlight. Insufficient sunlight can also lead to the older leaves dying off, while the new leaves will have a lighter color and smaller size compared to the previous foliage. While these plants love sun exposure, they can suffer from excessive heat and ultraviolet light during the intense summer months. To prevent the leaves and flowers from scorching, covering them with a green shade net is advisable. When kept indoors, using a fan to reduce the heat can be helpful.

How often should I water my West Indian rattlebox throughout the year?

As the seasons progress, you can expect your West Indian Rattlebox's water needs to increase. In spring, watering once per week should suffice. However, as the summer heat arrives, especially for West Indian Rattlebox growing in containers, you will likely need to water more frequently, up to about three times per week. This is because container soil dries out faster in warm weather compared to ground soil. In autumn, when the temperature cools down and the sun is not as intense as in summer, your West Indian Rattlebox may require slightly less water, even while it is still in bloom.

Do we need to give special care to the West Indian rattlebox regarding sunlight as it grows?

The West Indian rattlebox requires more light while it is growing compared to when it is fully mature. Younger plants should receive sufficient light, but they may not be accustomed to intense sunlight, especially if they were grown in a nursery. These plants can be more sensitive to the sun during the summer, so it is best to gradually increase their exposure to light.

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

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