Black salsify (Scorzonera hispanica)

Also known as: Oyster plant, Spanish salsify

The black salsify plant features yellow, ray-like flowers similar to those of a dandelion. Its slender, black taproot can reach lengths of up to one meter and has a diameter of about 2 cm. The root's exterior is black, while the interior is white and creamy.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Black salsify

Lifespan

Perennial

Plant Type

Herb

Plant Height

1 m

Spread

30 cm

Leaf Color

Green

Flower Size

4-6 cm

Flower Color

Yellow

Images of Black salsify

Quickly Identify Black salsify

Look for a long, black root that secretes a white, milky sap when cut. The plant has lanceolate leaves and produces yellow, dandelion-like flowers.

Scientific Classification of Black salsify

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Scorzonera

Species

Black salsify

Planting and Growing of Black salsify

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

4-8 hours

Ideal Temperature

60-70℉

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 Black salsify?

Scorzonera hispanica, commonly known as black salsify, requires adequate watering to thrive. Approximately 500 milliliters per session is ideal. Ensure the soil is moist but not waterlogged, allowing it to dry slightly between waterings. This balance prevents root rot and supports healthy growth.

What are the symptoms of an underwatered Black salsify? ›

What should I do if my Black salsify is not getting enough water? ›

What are the symptoms of an overwatered Black salsify? ›

How to save an overwatered Black salsify? ›

What Are the Sunlight Requirements for Black salsify?

Sunlight Requirements: Full sun, Partial sun

Duration of light: At least six hours daily

Scorzonera hispanica thrives in full to partial sun, ideally seven to eight hours of light. Adequate sunlight is essential for vigorous growth, healthy leaves, and optimal flowering.

What is the best lighting condition for Scorzonera hispanica? ›

How can one achieve the ideal lighting conditions? ›

What are the benefits of Scorzonera hispanica receiving ideal lighting? ›

What Is the Ideal Temperature Range for Black salsify?

Ideal Temperature: 60 ~ 70℉

For optimal growth, Scorzonera hispanica thrives in temperatures ranging from 60°F to 70°F. This range allows for sufficient enzymatic and metabolic processes necessary for healthy plant development. Maintaining this temperature helps ensure the plant remains stress-free and productive.

What Soil is Best for Black salsify?

Soil type: Loam, Sandy loam, Calcareous soil

Soil PH: 6.5 ~ 7.5

Scorzonera hispanica thrives in well-draining soils that prevent waterlogging. Ensuring the soil is loose and aerated helps promote healthy root growth and prevents root rot, which is essential for robust plants. This plant prefers soil rich in organic matter. Composted materials enhance soil fertility, providing essential nutrients that contribute to the plant's vigorous growth and increase its yield potential. Maintaining moderate moisture levels in the soil is key for Scorzonera hispanica. Consistent moisture supports continuous nutrient uptake and ensures steady plant development without the stress of drought.

How to Fertilize Black salsify?

Fertilizer type: Balanced

Scorzonera hispanica, commonly known as black salsify, requires careful attention to fertilizer amounts. For liquid fertilizers, use approximately 3 to 5 liters of diluted solution per square meter, ensuring the concentration is mild to prevent root burn. Slow-release fertilizers should be applied at about 20 grams per square meter, focusing on balanced nutrients that cater primarily to root development and overall plant health.

How to Prune Black salsify?

Pruning Time: Spring, Summer

Begin by inspecting the Scorzonera hispanica for any dead, wilted, or discolored leaves. Use a pair of clean, sharp scissors to remove these leaves, cutting them back to the base. This encourages better air circulation and allows the plant's energy to be directed towards healthy growth. After the blooming period, which typically occurs in late summer, prune the flower stalks back to the base. This not only tidies up the plant's appearance but also helps in redirecting nutrients and energy to the roots, aiding in its vegetative growth and preparing it for the next bloom cycle. More About Pruning Techniques→

How to Propagate Black salsify plant?

Propagate Time: Spring, Early spring, Late spring

The first step is to prepare a well-draining soil mix, enriched with organic compost. This ensures that the seeds or divided sections receive the right amount of nutrients and water. Ensure the soil has a neutral pH and is free from pests and diseases.

Sow Scorzonera hispanica seeds thinly in trays filled with prepared soil. Cover lightly with soil and water gently. Maintain a consistent temperature of around 15-20°C to support germination, which generally takes 10 to 14 days.

For division, select a mature Scorzonera hispanica plant. Carefully dig around the roots to minimize damage. Use a sharp knife to divide the plant into smaller sections ensuring each has a healthy root system. Plant these sections immediately into prepared soil.

More About Propagating Techniques→

How to Repot Black salsify plant?

Repotting frequency: Every two years

Look for signs like roots growing through drainage holes, or the soil drying out too quickly, indicating overcrowding. Spring and autumn are ideal times, as the plant is in an active growth phase, minimizing transplant shock.

Select a pot with adequate drainage holes, slightly larger than the current one. This helps prevent waterlogging and provides room for root growth, ensuring the plant thrives in its new home.

Use well-draining sandy loam soil. This type allows excess water to escape while retaining the right amount of moisture and nutrients, essential for Scorzonera hispanica's optimal health and growth.