Vegetable · Asteraceae
Salsify
Tragopogon porrifolius
Do not let salsify intimidate you: give it loose, deep soil and a patient, cool stretch of weather, and it pays you back with a sweet root that hints of oyster.
Full sun
Every 4–7 days
50–77°F · 10–25°C
110–150 days
Overview
Do not be put off by salsify's reputation. It is grown for a long, slim taproot with a mild taste that reminds people of oysters, and that is where the old nickname oyster plant comes from. The plant is a member of the daisy family and a near cousin of the common dandelion, so in a second season it will throw up star-shaped purple flowers of its own. Most growers simply harvest the roots before it reaches that stage, and there is nothing hard about doing the same.
Here is the reassuring part: salsify asks for patience far more than for green-thumb skill. It wants a cool, unhurried season of roughly four to five months, and the root only comes out smooth and straight when the ground beneath it is deep and loose. Spend your effort getting that bed ready and the rest more or less takes care of itself, because salsify shrugs off most pests and hardly ever needs fussing.
Best of all, the reward waits until late in the year, when you may have half forgotten about it. A few autumn frosts sweeten the roots, and they sit happily in the ground right through winter, so you can lift them fresh any day the soil is soft enough to dig. If a first attempt gives you a forked root or two, do not worry, since even those are perfectly good to eat.
Care
The short version: give salsify full sun and a deep, loose, stone-free bed that you have worked over well before sowing. Water it about 1 to 2 inches a week so the roots stay straight, sow early for a nice cool season, and wait to dig until the first frosts have sweetened the roots. None of it is fussy.
Light
Give salsify a spot in full sun if you can, though it will forgive a little partial shade and still give you a crop. Every extra hour of sunlight the leaves gather feeds straight down into the growing root.
Water
Aim for about 1 to 2 inches of water a week and try to keep the soil evenly damp through the whole season. That steady dampness is what stops the roots from forking or splitting, so do your best not to let the bed lurch from bone dry to sopping wet.
Soil
If you fuss over one thing, make it the soil, since this is what truly shapes the crop. Salsify longs for deep, loose, stone-free loam full of organic matter, worked a good 12 to 24 inches down so the taproot can travel straight without meeting a stone. A pH anywhere between 6.0 and 7.5 will keep it happy.
Temperature
This is a cool-season root at heart, happiest growing somewhere around 50°F to 77°F (10°C to 25°C). Cold weather does not faze it in the least, and a late frost actually does the roots a favor by sweetening their flavor.
Humidity
Plain outdoor air of about 40% to 70% humidity suits salsify fine, so this is nothing to lose sleep over. What matters more is airflow, because damp, stagnant conditions can invite white rust onto the leaves.
Feeding
Mix some compost or a balanced fertilizer into the bed before sowing, and that is usually all the feeding salsify needs for the year. Do steer clear of fresh manure, though, since it tends to make the roots fork and grow whiskery side roots.
Pruning
Happily, there is no regular pruning to keep up with. In that first year, all you need to do is pinch off any flower stalk as soon as you spot it, which keeps the plant sending its energy down into the root rather than up into seed.
Repotting
not_applicable
Size & spacing
Once they run up their flower stalks, plants stand 1 to 4 feet (30 to 122 cm) tall with a narrow footprint of just 6 to 12 inches (15 to 30 cm). Leave a little gap between them so each root has room to fatten up without elbowing its neighbors.
When to plant
Salsify keeps its own slow calendar, and that is fine. Drop the seed right where it will grow in early spring, the moment the soil crumbles loose in your hand, then let the roots quietly size up over a cool season of four to five months. Start digging in fall once a frost or two has sweetened them, and since the roots hold safely underground, there is no need to bring the whole crop in at once.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Direct sow in early spring as soon as the soil can be worked (about 2-4 weeks before the last frost); salsify needs a long, cool growing season.
- Harvest: Harvest roots in fall after the first frosts, which sweetens them; roots can overwinter in the ground and be dug through winter or early spring while the soil is workable.
Hardiness
USDA hardiness zones: 5–9
Temperature: down to -29°C
Troubleshooting
Take heart: salsify rarely gives much trouble, and the few things that do go sideways almost always begin underground or with the weather. Forked roots and early bolting are the complaints you are most likely to meet, and both come down to the bed and the timing. Find your symptom below, gently sort out the cause, and your crop will be just fine.
An early flower stalk and a woody root in year one
Sometimes salsify bolts, meaning it rushes up a flower stalk in its first year while the root turns woody and hard to enjoy. Heat, dry spells, or seed sown too late into already-warm soil are the usual triggers. Get your seed in early so the plant enjoys a long, cool run, pinch off flower stalks as soon as they rise, and lift any good roots before they toughen.
Fix:
- Remove flower stalks as soon as they appear
- Harvest usable roots before they become woody
Nibbled roots and little tunnels in winter beds
To a hungry mouse or vole, roots left in the ground over winter are an easy meal, and they leave little tunnels along the rows and hollowed roots behind. The easiest fix is simply to dig and store the roots before rodent numbers build up. If you would rather leave them out in the bed, keep the mulch in check and set some rodent controls around the edges.
Fix:
- Harvest and store roots before deep winter rodent pressure
- Manage mulch and use rodent controls around the bed
Roots that fork, split, or sprout whiskery side roots
If your roots come up forked, do not blame yourself, because the cause is nearly always the bed rather than the gardener. Stones, packed ground, or soil that was not dug deep enough nudge the taproot off its path, and patchy watering or fresh manure only adds to it. Loosen the soil a full 12 to 24 inches deep, pick out the stones, keep the water steady, and next time those roots will slide down long and smooth.
Fix:
- Work the soil deeply (12-24 inches) and remove rocks before sowing
- Maintain even moisture of 1-2 inches of water per week
- Amend with compost rather than fresh manure
Pale blisters or a dusty white film on the foliage
When leaves sit damp and crowded, white rust and powdery mildew can move in, appearing as little white blister-like bumps or a powdery grey-white dusting. Pick off the spotted leaves and throw them away, thin things out so air can flow between the plants, and try to keep the foliage dry. Moving the crop to a fresh patch each year keeps the trouble from taking hold.
Fix:
- Remove and dispose of affected foliage
- Improve airflow and reduce overhead moisture
- Rotate the crop to a new bed
Soft little clusters and sticky patches on the leaves
Aphids sometimes settle onto the leaves and stems in small soft clusters, leaving a sticky film of honeydew as they feed. A firm blast from the hose washes most of them away, and a little insecticidal soap will see off a colony that hangs on. Check the plants now and then, and trust the natural predators to pitch in and help.
Fix:
- Dislodge with a strong jet of water
- Apply insecticidal soap if needed
Toxicity
You can relax completely here, because salsify is grown to be eaten and every part of it is safe. The roots, the shoots, and the young leaves all make good eating, and the plant is gentle around pets, livestock, and children alike. The one small thing worth a mention is the milky white sap from cut roots, which may stain your hands but will not hurt anyone.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Salsify is not on the ASPCA toxic list, so a curious cat that chews a leaf has nothing to worry about. The milky sap might leave a mark on a paw, but it will not do any harm.
Dogs None
A dog that digs up and gnaws the roots will come to no harm, since no part of salsify is poisonous. As with any vegetable, a very large helping might loosen the stomach a little, but the plant itself is perfectly safe.
Horses Safe
Horses can graze on salsify with nothing to fear, as the plant holds no toxin that would bother them.
Rabbits Safe
Rabbits are welcome to nibble the tender leaves and roots, and plenty of them enjoy the fresh greens. Just bring any new green into their diet gradually so their digestion stays settled.
Livestock Safe
Cattle, goats, and sheep can all eat salsify out in the field without any ill effect, which is part of why it drifts through grazing land. There is simply no toxin here to worry about.
Birds Safe
Birds are free to peck at the seeds and leaves as they please, since the plant poses no danger to them. Backyard hens can happily share in the trimmings too.
People Safe
Salsify is a food crop, and its roots, shoots, and young leaves are all good on the plate. The only minor bother is the sticky white latex from cut roots, and that rinses off your hands easily.
Cut roots and stems exude a milky white latex (typical of the daisy family) that can stain hands; wash after handling.
Varieties
You will only meet a couple of salsify types in most gardens, which makes choosing easy. They divide simply into one polished kitchen variety and the rougher wild species, and these two are all you really need to know.
Mammoth Sandwich Island
This is the white-rooted favorite you will see most often, loved for its long, smooth, evenly tapered roots and that gentle oyster taste salsify is famous for.
Common (purple) salsify
The original wild form, which raises mauve-purple, dandelion-like flowers in its second season above roots with the same white flesh.
How to propagate
There is really only one way to start salsify, and happily it is the simplest one: sow seed straight into its final spot. The long taproot dislikes being lifted and moved, so skipping transplanting is a kindness to both of you.
SeedEasy
Direct sow in early spring as soon as the soil can be worked · Germinates in about 8-10 days; roots reach harvest size in roughly 110-150 days
Sow salsify right into its final bed in early spring, as soon as the ground turns workable, since that long taproot hates being disturbed. The seedlings usually push through in about 8 to 10 days, and the roots then swell over a long, cool spell of roughly 110 to 150 days. Do reach for fresh seed each year, because salsify seed loses its vigor fast from one season to the next.
Myths
Salsify and black salsify are just two names for one plant.
They may cook up looking similar, but they are two separate species. The salsify grown here is Tragopogon porrifolius, with pale-skinned roots and purple flowers, whereas black salsify is Scorzonera hispanica, which has dark-skinned roots and yellow blooms.
You have to dig salsify roots before frost or they will spoil.
It is actually the other way around. Frost sweetens the roots rather than ruining them, so you can happily leave them where they grow and dig them right through winter or into early spring, for as long as the soil stays soft enough to work.