Treacle Mustard (Erysimum cheiranthoides)

Also known as: Treacle Wallflower, Treacle hedge-mustard

Treacle Mustard (Erysimum cheiranthoides), originally from Europe, is now found in many parts of the world and is often regarded as a troublesome weed. It poses several issues for agriculture and livestock:

1. **Crop Yield Reduction**: This plant competes with crops for essential resources like nutrients, water, and sunlight, leading to decreased yields.

2. **Livestock Toxicity**: Treacle Mustard contains compounds that can be harmful to livestock if ingested in significant amounts, causing potential health problems.

3. **Weed Control Expenses**: Managing this invasive weed can be costly, requiring additional resources for effective control measures.

4. **Seed Contamination**: The presence of its seeds can spoil grain crops, as they impart a bitter taste, thereby lowering the quality and marketability of the produce.

In summary, Treacle Mustard is a significant concern for both crop production and livestock health, necessitating diligent management strategies.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Treacle Mustard

Lifespan

Annual, Biennial

Plant Type

Herb

Plant Height

20 cm to 1 m

Spread

25 cm to 40 cm

Leaf Color

Green

Flower Size

5 mm to 1.2 cm

Flower Color

Yellow

Images of Treacle Mustard

Quickly Identify Treacle Mustard

Bright yellow flowers with 4 petals forming a cross shape.

Elongated seed pods (siliques) standing erect, distinctive from other species.

Round flower clusters, each petal bearing 6 stamens (4 long, 2 short).

Slender, elongated fruit pods (up to 2 inches) with a single row of small seeds.

Leaves covered in star-shaped hairs, ascending stem with pinnate veins.

Scientific Classification of Treacle Mustard

Phylum

Vascular plants

Class

Dicotyledons

Order

Brassicales

Family

Cruciferae

Genus

Wallflower

Species

Treacle Mustard

Planting and Growing of Treacle Mustard

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

4-8 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6-7.5

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 Treacle Mustard?

Water Erysimum cheiranthoides thoroughly until the water drains from the bottom of the pot. The goal is to maintain even moisture, but not to keep the soil soggy. Ensure the top inch of the soil dries out before the next watering session to prevent root rot.

What are the symptoms of an underwatered Treacle Mustard? ›

What should I do if my Treacle Mustard is not getting enough water? ›

What are the symptoms of an overwatered Treacle Mustard? ›

How to save an overwatered Treacle Mustard? ›

What Are the Sunlight Requirements for Treacle Mustard?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Erysimum cheiranthoides does best under full to partial sun, meaning an exposure of 6 to 8 hours daily that boosts its growth, intensifies flower color, and enhances seed production.

What is the optimal amount of light for Erysimum cheiranthoides? ›

How can one achieve this ideal light condition? ›

What are the benefits of providing ideal light conditions? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Treacle Mustard?

Ideal Temperature: 60 ~ 75℉

For optimal growth, Erysimum cheiranthoides thrives best within a temperature range of 60 to 75°F. This range ensures the plant's physiological processes proceed without stress, promoting healthy development and vigorous blooming.

What Soil is Best for Treacle Mustard?

Soil type: Loam, Sandy loam

Soil PH: 6 ~ 7.5

Erysimum cheiranthoides thrives in loamy soils rich in organic matter, which provide essential nutrients for optimal growth. High nutrient content enhances blooming and overall plant vigor, making it ideal for lush growth. This plant demands well-drained loamy or sandy loam soils to prevent root rot. Adequate drainage ensures roots have access to oxygen, reducing stress and promoting healthy development. While Erysimum cheiranthoides enjoys moisture-rich environments, the ability of loamy soils to retain moisture without becoming waterlogged is crucial. This balance supports consistent growth and flowering. More About Soil→

How to Fertilize Treacle Mustard?

Fertilizer type: Balanced

For Erysimum cheiranthoides, it's crucial to maintain a balanced approach to fertilization. Use a diluted liquid fertilizer at half the recommended strength every time you fertilize. This allows the plant to uptake nutrients without the risk of burning the roots. Each plant will need about 100 ml of this dilute solution per instance.

How to Prune Treacle Mustard?

Pruning Time: Spring, Summer

Begin by assessing the plant for any dead or diseased stems and remove these first using sharp, clean pruning shears. Next, focus on trimming back leggy growth to maintain a compact shape. Cut just above a pair of leaves or buds to stimulate branching. For an aesthetic touch, prune the plant into your desired shape, but avoid removing more than a third of the plant at one time, as this can stress it.

How to Propagate Treacle Mustard plant?

Propagate Time: Spring, Early spring

Fill the seed tray with potting soil, ensuring it's evenly spread. Lightly moisten the soil before sowing seeds to provide a humid environment that aids germination.

Scatter the Erysimum cheiranthoides seeds evenly over the soil surface. Do not cover them too deeply; a thin layer of soil or vermiculite is sufficient for light penetration.

Water the seeds gently using a fine spray to avoid dislodging them. Maintain a consistent moisture level and keep the tray in a location with appropriate light conditions.

How to Repot Treacle Mustard plant?

Repotting frequency: Once every 2 years

Erysimum cheiranthoides should be repotted when you notice roots circling the pot or emerging from drainage holes, indicating root-bound conditions. Another signal is slow growth and wilting even with adequate watering, suggesting nutrient deprivation. The best time to repot is during its active growing season in spring or early summer to minimize stressing the plant.

Choose a pot that's one size larger than the current one, ensuring it has sufficient drainage holes. The material can be clay or plastic, but clay is preferable for its breathability, which helps prevent root rot by allowing excess moisture to evaporate. This helps maintain a healthy root system and supports the plant's overall growth.

Select a well-drained sandy soil mix. A combination of garden loam, coarse sand, and some organic matter like peat moss or compost enhances aeration and drainage while providing essential nutrients. This soil type prevents water logging, reducing the risk of diseases and promoting a robust root structure.

Toxicity

Ingestion, Contact

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.