Arrowhead rattlebox (Crotalaria sagittalis)

Also known as: Rattlebox

The arrowhead rattlebox (Crotalaria sagittalis) is an annual herb notable for its unique arrowhead-shaped leaves and bright yellow, pea-like flowers. It thrives in well-drained, sandy or loamy soils and prefers sunny locations, although it can tolerate partial shade. The plant is characterized by its upright growth and distinctive seed pods that produce a rattling sound when shaken, aiding in seed dispersal. Typically, the arrowhead rattlebox grows to about a foot in height, making it a modest yet appealing addition to various habitats, including prairies and open woodlands.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Arrowhead rattlebox

Lifespan

Annual, Perennial

Plant Type

Herb

Plant Height

10 cm to 41 cm

Spread

N/A

Leaf Color

Green

Flower Size

Approximately 1 to 2 cm

Flower Color

Yellow

Images of Arrowhead rattlebox

Quickly Identify Arrowhead rattlebox

Crotalaria sagittalis can be identified by its arrowhead-shaped leaves, small yellow flowers, and distinctive seed pods that rattle when dry.

Scientific Classification of Arrowhead rattlebox

Phylum

Vascular plants

Class

Dicotyledons

Order

Fabales

Family

Legume

Genus

longbeak rattlebox

Species

Arrowhead rattlebox

Planting and Growing of Arrowhead rattlebox

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

6-12 hours

Ideal Temperature

70-85℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Arrowhead rattlebox?

Crotalaria sagittalis benefits from a moderate watering regime; ensure that the soil is evenly moist but not waterlogged. Aim for approximately 200 milliliters each time, adjusting based on the plant's size and container's drainage capability.

What are the symptoms of an underwatered Arrowhead rattlebox? ›

What should I do if my Arrowhead rattlebox is not getting enough water? ›

What are the symptoms of an overwatered Arrowhead rattlebox? ›

How to save an overwatered Arrowhead rattlebox? ›

What Are the Sunlight Requirements for Arrowhead rattlebox?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours

Crotalaria sagittalis thrives in full sun to partial sun conditions. Adequate lighting enhances photosynthesis, encourages lush foliage, and ensures vibrant, prolific flowering.

How much sunlight does Crotalaria sagittalis ideally need? ›

What are the solutions to achieving ideal sunlight exposure? ›

What are the benefits of achieving ideal light conditions for this plant? ›

What Is the Ideal Temperature Range for Arrowhead rattlebox?

Ideal Temperature: 70 ~ 85℉

The ideal temperature range for Crotalaria sagittalis is between 70°F and 85°F. This range ensures optimal photosynthesis and growth, providing the necessary warmth for this species. It mimics its native environment and supports healthy leaf and flower development.

What Soil is Best for Arrowhead rattlebox?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Crotalaria sagittalis thrives best in well-drained soils, which prevent waterlogging and root rot, ensuring a healthy root system and vibrant growth. This plant benefits from soils enriched with organic matter, promoting vigorous growth and flowering due to a readily available nutrient supply. A light soil texture is crucial, allowing easy root penetration and aeration, promoting robustness and overall plant health.

How to Fertilize Arrowhead rattlebox?

Fertilizer type: Balanced

For Crotalaria sagittalis, use a balanced liquid fertilizer diluted to half strength to avoid nutrient burn once every two weeks. For slow-release solid fertilizers, apply them according to the package instructions to provide sustained nutrients throughout the growing season.

How to Prune Arrowhead rattlebox?

Pruning Time: Spring, Summer

Start by trimming back any overly long branches to maintain an attractive shape, being sure to cut just above a healthy node. Keep an open center to the plant, which helps light penetrate and stimulates inner growth. Focus on encouraging a balanced shape by cutting back about one-third of the plant’s growth. Perform your pruning during the early morning or late afternoon to minimize stress on the plant. Avoid pruning during the hottest part of the day to prevent stress. Make clean cuts at a 45-degree angle to promote better healing and direct plant growth. More About Pruning Techniques→

How to Propagate Arrowhead rattlebox plant?

Propagate Time: Late spring, Early summer

Fill seed trays with potting mix, ensuring an even surface. Avoid compacting the soil too tightly, as this can hinder drainage. Moisten the soil thoroughly before sowing the seeds, making sure it's damp but not waterlogged.

Sprinkle the Crotalaria sagittalis seeds evenly over the moistened soil surface. Lightly press the seeds into the soil using your fingers to ensure good seed-to-soil contact. Cover the seeds with a thin layer of potting mix to protect them and help maintain moisture.

Place the seed trays in a location with bright, indirect sunlight. Use a plastic cover or a propagator lid to maintain humidity. Keep the soil consistently moist by misting it regularly with water, but be careful to avoid overwatering, which can cause seed rot.

More About Propagating Techniques→

How to Repot Arrowhead rattlebox plant?

Repotting frequency: Every 1-2 years

Repot Crotalaria sagittalis when you notice roots emerging from the drainage holes or the soil seems compacted. Spring and summer are ideal, as the plant is in active growth and better able to recover.

Select a pot that's one size larger with excellent drainage to prevent water logging. Clay pots are ideal as they wick away excess moisture, helping prevent root rot. A well-selected pot supports healthy root and foliage growth.

Choose a sandy, well-draining soil mix to emulate the natural habitat of Crotalaria sagittalis. This prevents water retention and promotes aeration, ensuring healthy root development and reducing disease risk.

Toxicity

Ingestion

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.