Texas bullnettle (Cnidoscolus texanus)

Also known as: Finger Rot, Mala mujer

The Texas bullnettle is found in Texas, Arkansas, Kansas, Louisiana, and Oklahoma. It has stinging hairs that can cause significant pain, burning, and itching for hours. This perennial plant features fragrant white flowers, and its ripe seeds are edible.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Texas bullnettle

Lifespan

Perennial

Plant Type

Herb

Plant Height

30 cm to 80 cm

Spread

1 m

Leaf Color

Red

Flower Size

2.5 cm

Flower Color

White

Images of Texas bullnettle

Quickly Identify Texas bullnettle

Identifying Cnidoscolus texanus involves looking for its distinctive white, star-shaped flowers and its large, deeply lobed leaves. The plant is also noted for the presence of irritating hairs on its stems and leaves.

Scientific Classification of Texas bullnettle

Phylum

Vascular plants

Class

Dicotyledons

Order

Malpighiales

Family

Spurge

Genus

Cnidoscolus

Species

Texas bullnettle

Planting and Growing of Texas bullnettle

Care Difficulty

Hard

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 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 Texas bullnettle?

For Cnidoscolus texanus, it's important to water until the soil is moist but not soggy. This plant thrives on a balance of moisture, meaning you should aim to provide about 200 ml of water per session. Ensure the pot has good drainage to avoid waterlogging.

What are the symptoms of an underwatered Texas bullnettle? ›

What should I do if my Texas bullnettle is not getting enough water? ›

What are the symptoms of an overwatered Texas bullnettle? ›

How to save an overwatered Texas bullnettle? ›

What Are the Sunlight Requirements for Texas bullnettle?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 4-6 hours

Cnidoscolus texanus prefers a light range of partial to full sun exposure. Ideal lighting supports vigorous growth, enhances photosynthesis efficiency, and aids in achieving the plant's distinctive flowering feature.

What type of light is optimal? ›

How can one achieve ideal lighting? ›

What benefits does ideal lighting offer? ›

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What Is the Ideal Temperature Range for Texas bullnettle?

Ideal Temperature: 70 ~ 85℉

For optimal growth, Cnidoscolus texanus thrives within a temperature range of 70°F to 85°F. This range provides adequate warmth that supports healthy photosynthesis and metabolic functions. Maintaining temperatures within this band ensures vigorous growth and reduces the risk of thermal shock.

What Soil is Best for Texas bullnettle?

Soil type: Sandy soil, Loam

Soil PH: 6.5 ~ 7.5

Cnidoscolus texanus thrives in well-draining soils that prevent waterlogging. Good drainage is crucial to avoid root rot, ensuring the plant maintains a healthy growth cycle and robust structure. While being relatively drought-tolerant, this plant benefits from soils with moderate organic matter, providing essential nourishment for surges in growth and flowering. Uniform soil composition supports even root spread. This consistency aids in optimizing nutrient uptake and water access, fostering a stable plant structure.

How to Fertilize Texas bullnettle?

Fertilizer type: Balanced

Cnidoscolus texanus thrives best when given a balanced fertilizer, such as a 10-10-10 NPK formula. When using liquid fertilizers, ensure each application delivers approximately ¼ teaspoon per gallon of water. For slow-release granules, apply them evenly over the soil surface, ensuring not to exceed 1 pound per 100 square feet annually.

How to Prune Texas bullnettle?

Pruning Time: Spring, Summer, Autumn

Always use sharp, clean pruning shears to avoid damaging the plant's tissues. A pair of gloves is essential as Cnidoscolus texanus, also known as Texas bullnettle, can be spiny and irritate the skin. Start by removing any dead, diseased, or damaged stems. Cut them back to the base or to healthy growth, ensuring you do not leave any stubs which could become disease entry points. Trim back overgrown stems to maintain the desired shape. Aim to cut just above a leaf node or an outward-facing bud to encourage new growth outward rather than inward, fostering a balanced appearance. More About Pruning Techniques→

How to Propagate Texas bullnettle plant?

Propagate Time: Spring,Early summer

Gather seeds from mature Cnidoscolus texanus plants by allowing pods to dry and crack open naturally. Harvest seeds carefully to ensure they are fully mature and viable for planting.

Select a healthy stem from an established plant, cutting just below a node. The cutting should be about 4-6 inches long, with a few leaves retained at the top and the bottom leaves removed to reduce moisture loss.

For seeds, press them into the soil surface in your prepared seed tray and cover lightly with soil. For cuttings, dip the cut end in rooting hormone and plant in moist soil, ensuring good contact between the cutting and the substrate.

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How to Repot Texas bullnettle plant?

Repotting frequency: Every 2-3 years

Watch for overcrowded roots breaking through the pot's drainage holes or when growth appears stunted. These are clear signs that your Cnidoscolus texanus needs a new, more expansive home. Typically, when spring kicks in or temperatures warm up, it's an ideal time to proceed with repotting.

Opt for a pot that offers at least one to two inches more in diameter than the current one to allow room for growth. Ensure the pot has excellent drainage to prevent root rot. Choosing a terracotta pot can enhance breathability and moisture control, which is beneficial for this plant.

A sandy, well-draining soil mix with a bit of organic matter is optimal for Cnidoscolus texanus. This ensures the roots don’t stay too wet, letting water drain efficiently while retaining enough moisture for nutrient absorption, fostering healthy plant development.

Toxicity of Texas bullnettle

Is Texas bullnettle toxic to humans?

Texas bullnettle is a toxic plant, with the exception of its berries and seeds. Its leaves are not safe to eat and contain a toxin that acts as a skin irritant. Both the leaves and stems are adorned with minuscule nettles that can provoke irritation upon contact with skin. Mild symptoms include redness, burning, and itching, while more severe reactions may involve intense pain and significant inflammation. Due to the presence of nettles, there have been no reported cases of ingestion, whether accidental or intentional. It is advised to cover all exposed skin while handling this plant to prevent contact with its leaves and stems.

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.

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