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Last edited on 29 Nov 2025. View history

salsify Salsify

Tragopogon porrifolius
Also known as Oyster Plant (EN)

How to sow salsify: Direct seed outdoors, thin to 7cm

Sun requirement for salsify: Plant in Partial Sun

Salsify, or white salsify, is a perennial plant grown as an annual for it's edible root and leaves. It does well in cool weather and is cultivated similarly to carrots and parsnips. It is similar to Black Salsify, but they are in different genera. Both plants are grown for their edible roots and cultivated like carrots and parsnips. Salsify's leaves look like a clump of coarse grass with starry pink to purple flowers. The greens and flowers can be used in salads. Flowers should be dead-headed to prevent the plant from becoming invasive. Salsify is less hearty than Black Salsify. It requires sandy loam soil to grow straight roots and can be grown in containers. The taproot has dirty-beige skin and resembles a large white carrot. It has an oyster-like taste that some consider more subtle than Black Salsify. It can be eaten boiled or mashed; skin is inedible and should be removed. Plants can stay in the ground until just before the soil freezes and roots can be stored in a root cellar through the winter. Take extra care not to break the roots while harvesting - damaged roots have a much shorter shelf life.

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harvests
1
seed packet
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Salsify facts

Lifespan

Annual living and reproducing in a single year or less

Height

120cm
What are growing degree days?

A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.

Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.

For salsify, the FAO EcoCrop database gives a lowest growing temperature of 2°C and a shortest growing cycle of 120 days at its best temperature, about 1680 growing degree days to a first harvest.

Where you've told us where your garden is, we use this and the weather there to predict when your salsify will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.

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Ecological requirements

Data from the FAO EcoCrop database for Tragopogon porrifolius L.

Family / Taxonomy Magnoliopsida
Asteridae
Asterales
Compositae
Optimal temperature 13 - 19 °C
Absolute temperature 2 - 24 °C
Killing temperature growth: -1 °C, rest: -2 °C
Optimal rainfall 600 - 900 mm/year
Absolute rainfall 400 - 1100 mm/year
Optimal soil pH 6.5 - 7.5
Absolute soil pH 6.0 - 8.0
Crop cycle 120 - 180 days
Life form herb
Life span annual, biennial
Habit erect, acaulescent (or rosette plants)
Optimal soil depth medium (50-150 cm)
Optimal soil texture medium, organic
Optimal soil fertility high
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod long day (>14 hours)
Optimal light clear skies to cloudy skies

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