The Grading School · What saffron is
Three threads,one flower.
Saffron is the dried red stigma of a crocus. There are three in each flower, they are taken out by hand, and everything strange about the price follows from those two facts.
Chapter 01 · The plant
What is saffron, exactly?
Saffron is the dried stigma of the flower Crocus sativus. The crocus opens in autumn, lilac and low to the ground, and inside each flower are exactly three crimson stigmas. Those three threads are the entire harvest. The petals are not saffron. The stamens are not saffron. The pale stalk the stigmas sit on is not the part you are paying for, though it often gets sold alongside it.
The flowers open as the morning warms and have to be picked the same morning, because a crocus left in the afternoon sun loses much of the colour and aroma that makes it worth picking. They are gathered by hand, opened by hand, and the stigmas are pulled out by hand. No machine has yet replaced this work on a commercial scale, which is the single most important thing to understand about saffron and its price.
- The plant
- Crocus sativus autumn-flowering, lilac
- The part
- The three red stigmas, and nothing else
- The harvest
- By hand, early in the morning, often before the flowers have fully opened
- A gram
- Roughly 450 threads, about 150 flowers thick threads weigh more, so a gram of them counts fewer
Chapter 02 · The arithmetic
Why is saffron so expensive?
Because a gram is about 150 flowers, and every one of them was opened by a person. Published yields put it between roughly 150,000 and 170,000 flowers to the kilogram, depending on the grade and the year. There is no cartel, no artificial scarcity, no mystique, just an unusually poor ratio between labour and yield, repeated at every stage. Supply and trade conditions move the price from there. Iran grows around 90% of the world's saffron, and when war disrupted its exports in 2026, prices rose.
It also explains the shape of the fraud. When a product is this expensive by weight and this hard to identify by eye, adding weight is enormously profitable and very hard to catch. That is why the trade has a grading standard, a laboratory test and a kitchen test, and why a house that will not show you any of the three is telling you something.
- Per flower
- 3 stigmas
- Per gram
- About 150 flowers, picked and stripped by hand published counts run from about 150 to 170, depending on the grade
- Per 5 g jar
- About 750 flowers, at 150 to the gram
- The window
- A few weeks a year
- The consequence
- Adding weight is one of the most profitable frauds in the spice trade
Chapter 03 · The thread
What does a good thread look like?
A whole stigma is a trumpet: wide and frayed at one end, narrowing to a point at the other, and deep red along its length. At the base it fades to a pale yellow stalk called the style. The style is where the argument lives. It weighs something and it colours almost nothing, so the more of it in a jar, the more of the price is going on filler.
That single distinction is what most grade names on a saffron label are really describing. We have given it a page of its own.
Deep crimson, trumpet-tipped, unbroken. This is the saffron. Colour, aroma and taste all live here.
What you wantThe pale yellow stalk under the stigma. It is part of the flower and it is not a fake, but it adds weight and contributes little to the dish.
What you may be paying for without knowingPotent, but fragmented, and fragments are easy to mix with things that are not saffron at all. Length is not vanity; it is part of the evidence.
Why whole threads matterChapter 04 · What is measured
What makes saffron taste, smell and colour the way it does?
Three compounds, and a laboratory can put a number on each of them. This is the part of saffron that can be measured rather than argued about, which is precisely why the honest end of the trade leans on it.
- Crocin
- Colour the number that matters most
- Picrocrocin
- Taste the noble bitterness
- Safranal
- Aroma the main scent compound behind saffron's hay-like, floral notes
- The standard
- ISO 3632 measures all three and assigns a category, chiefly on colour and bitterness
- Our reports
- Published per harvest lot on the traceability page
Chapter 05 · The three formats
Threads, powder or extract: what is the difference?
The same saffron, in three states, each solving a different problem. The honest distinction is not the grade you start with. It is how much you can verify, how long it keeps, and how much time you have.
The whole dried stigma. The only format you can inspect, count and test before you trust it. Works best bloomed before use. This is what we would tell a first-time buyer to start with.
See the jarThe same graded threads, milled fine, nothing added. It dissolves quickly in a spoon of warm liquid, which suits dough, batter and drinks, but a powder cannot be visually verified, so it is only ever as good as the house behind it.
For speedSaffron already drawn into liquid. No steeping, no waiting, and a consistent colour, if stored as directed. A few drops carry the colour into rice, tea or dessert.
No waitingChapter 06 · The impostors
What is sold as saffron but is not?
Safflower petals, corn silk and dyed paper are all sold as saffron somewhere in the world this morning. None of them come from a crocus. Turmeric is a real and excellent spice that is not saffron and is not a substitute for it (except for colour), whatever a supermarket shelf implies by putting them side by side.
You do not need a laboratory to catch the crudest of these. A glass of water and ten minutes, sometimes up to an hour, will expose dyed fakes and safflower. Blends, powders and added weight need a lab report.
The short version