Photo: RasbakCC BY-SA 3.0via Wikimedia Commonsresized / cropped
Black Salsify Plant Care
Scorzonera hispanica L.
Updated · Sources · How we source care data
Scorzonera hispanica, commonly known as black salsify or Spanish salsify, also known as black oyster plant, serpent root, viper's herb, viper's grass or simply scorzonera, is a perennial member of the genus Scorzonera in the sunflower family (Asteraceae), cultivated as a root vegetable in the same way as purple salsify (Tragopogon porrifolius), also in the sunflower family. It is native to Southern Europe and cultivated as a crop in Southern and Central Europe. It grows on nutrient poor soils, dry pasture, rocky areas, in thickets and on limy or marly soils of temperate zones.
Every 7–10 days
Full sun to partial shade
60–75°F
40–60%
At a glance
How do you care for Black Salsify?
Water Black Salsify every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–75°F (16–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Black Salsify Native To?
What Is the Black Salsify?
Black Salsify (Scorzonera hispanica) belongs to the Asteraceae family within the Scorzonera genus. Black Salsify is native to Southern Europe and cultivated as a crop in Southern and Central Europe. Black Salsify is also known as Scorzonera, Oyster Plant, Serpent Root.
Black Salsify displays an upright, clumping perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Black Salsify produces small yellow daisy-like flowers in clusters.
Leaf size: approximately 6 inches.
How Often Should You Water a Black Salsify?
Scorzonera hispanica requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Black Salsify Need?
Black Salsify thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Black Salsify Prefer?
Scorzonera hispanica grows best at temperatures of 60–75°F. Black Salsify prefers humidity levels of 40–60%.
Temperature
60–75°F
Humidity
40–60%
What Soil Mix Works Best for a Black Salsify?
Well-draining sandy loam with added compost for nutrients. Good drainage is essential for Black Salsify to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Black Salsify?
Feed Black Salsify every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Black Salsify?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Black Salsify?
Black Salsify can be propagated through seeds, division of root clumps. Similar propagation techniques also apply to scorzonera tau-saghyz plant care, which shares the same genus.
Is the Black Salsify Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Black Salsify, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Black Salsify?
Black Salsify is susceptible to aphids, slugs, snails. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Black Salsify Need?
Black Salsify grows outdoors in USDA Zone 4a – 9b. It survives winters down to planting zone 4a. Black Salsify is native to Southern Europe and cultivated as a crop in Southern and Central Europe.
Hardiness Zone
Zone 4a – 9b
Keep exploring plants
Black Salsify is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Scorzonera genus — compare its care with other Scorzonera species on PlantoScan.
Scorzonera is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Black Salsify thrives in bright light and direct sun — see other bright-light plants.
More Scorzonera Species
Other Scorzonera species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Scorzonera hispanica L., family Asteraceae (first published in Sp. Pl. : 791 (1753)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Black Salsify, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Rasbak, CC BY-SA 3.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 4a – 9b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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