What is kief? How to collect it from your grinder and store it
By the Golden High teamUpdated 14 October 20268 min read
Accessories and know-how
What is kief? Kief is the fine golden powder that builds up at the bottom of your grinder: trichomes, the tiny resin glands covering the flowers, knocked loose while grinding and sifted through the screen. It's the raw material of traditional hash. Here's where it comes from, how to collect it with the right grinder, how to store it without spoiling it, what to do with it, and why its name comes from the Arabic word kayf.
Grinder Metal Weed Gold
A 4-piece metal grinder with a fine screen and a bottom chamber to collect your kief.
From8,90 €See the grinder →
Grinder Kush Box 2-en-1
A grinder with a built-in storage box, so you grind and store in one place.
From2,90 €See the grinder →Kief: definition
What is kief? Trichome dust.
Take a close look at a flower: it's covered in tiny shiny hairs, as if it had been dusted with sugar. These are glandular trichomes. They make and store the plant's resin, meaning most of its cannabinoids and terpenes. When the flower is handled, dried or ground, some of these glands break off. Piled up, they form a sandy powder, from pale green to golden blond: kief.
People also call it "pollen", but that's misleading. In the botanical sense, pollen comes from male plants. Kief comes from female flowers: it's made of bits of resin, not reproductive cells.
- What it is: trichomes broken off the flower, in powder form.
- Where you find it: at the bottom of the grinder, in the chamber under the screen.
- Why you keep it: it concentrates the resin, so the aromas and the cannabinoids.
- What it becomes: once pressed, that's the basic idea behind traditional hash.
Under the microscope
Resin glands a few tenths of a millimetre wide.
A study published in 2023 in the Journal of Cannabis Research used an electron microscope to follow how trichomes develop on cannabis flowers. The glandular heads measured 40 to 110 µm across, sitting on stalks of widely varying length. The authors also cite earlier measurements: around 129 µm on average for high-THC varieties, versus 80 µm for hemp.
Capitate-stalked trichomes
The biggest ones: a round head on the end of a stalk. According to the 2023 study, they dominate on mature flowers.
Small bulbous trichomes
Much smaller (15 to 30 µm heads in the same study), they barely count in the harvest.
Another study, published in PLOS One, describes these trichomes as small projections made of a stalk and a head, responsible for producing the resin. The head works like a tiny chemical workshop fed by the flower. That's why kief smells so strong: it concentrates the most fragrant part of the plant.
Kief grinder
The third chamber, where it all happens.
A basic two-piece grinder grinds the flower, and that's it. Three- and four-piece models add a screen: trichomes knocked loose while grinding pass through the mesh and drop into a bottom chamber, while the ground herb stays on top. The more you use the grinder, the more the chamber slowly fills up.
| 2-piece grinder | 4-piece grinder with screen | |
|---|---|---|
| Grinding | Yes | Yes |
| Screen | No | Yes, fine mesh |
| Kief collection | No, it sticks to the teeth | Yes, in the bottom chamber |
| Best for | Occasional use, on the go | Enthusiasts who want to keep everything |
Our Grinder Metal Weed Gold Edition is one of these: four pieces, sharp teeth, an ultra-fine screen and a bottom chamber with a built-in scraper. The Grinder Kush Box 2-en-1 takes a different approach: grind and store your flowers in one place. We covered them, along with others, in 5 accessories that really change your experience, and you'll find the whole range in our accessories.
Grind dry
A flower that's too moist sticks to the teeth and clogs the mesh: a well-dried flower works better.
Let the screen do its job
A few light taps on the closed grinder help the powder get through the mesh.
Collect it cleanly
Use a small scraper or a brush to clear the chamber without damaging the screen.
What the sources say
What science says about kief.
Kief is a craft product, but it rests on well-documented biology. Here are the references that shed light on how it's made and how it keeps.
EUDA · European cannabis markets
The EU drugs agency describes resin production as separating the glandular trichomes, found mainly on the flowers, to get a fine powder that is then compressed. Traditional methods: rubbing and sieving.
PLOS One · 2021
Glandular trichomes, small projections made of a stalk and a head, are responsible for producing cannabis resin.
Journal of Cannabis Research · 2023
Glandular heads of 40 to 110 µm, which grow as flowering goes on, then turn brown and enter senescence at maturity.
Photochemical & Photobiological Sciences · 2024
Exposure to light significantly degrades cannabinoids, and the presence of oxygen strongly speeds up this degradation. THC is the most sensitive to light, CBD the most resistant.
In short: kief is the richest part of the flower, but also the most exposed. As a powder, its contact surface with air and light is huge. References at the bottom of the page.
How it's used
Sprinkle it, coat with it or press it.
Kief is rarely used on its own. It's usually added to a session to boost the aroma and intensity. Three uses come up most often.
- Sprinkled on ground flower, in a joint or a vaporizer, in small amounts.
- As a coating, like on "moon rock" style flowers: we wrote a whole article on moon rock.
- Pressed into a slab: heat and pressure fuse the powder, which turns into resin. That's the basic idea behind traditional hash, which we explain in what is hash.
Making hash from kief is really the home version of dry sift, the dry sieving done on a large scale. We go through this technique in our article on static hash and dry sift.
Concentrating means concentrating everything. Kief gathers the resin, so the cannabinoids too, including any traces of THC from a hemp flower. The percentage shown on a flower no longer applies to the powder you get from it. Keep it for personal use, start with a very small amount, and never before driving.
Storage
Light, air, heat: the three enemies.
Because it's a powder, kief spoils faster than a whole flower. The 2024 study on photodegradation is clear: light degrades cannabinoids, and oxygen strongly speeds up the process. So the smart move is to limit both.
- Leaving it in the grinder for weeks. The chamber isn't airtight and the kief gets compacted.
- A clear jar on the shelf. Light is one of the main causes of degradation.
- A big half-empty jar. The more air there is, the faster it oxidises.
- Near a heat source. The resin gets sticky and clumps together.
Ideally: a small airtight, opaque jar, or one made of tinted glass, kept somewhere cool and dry, filled as close as possible to the level of the powder. And as always, out of reach of children and pets.
Where the word comes from
From the Arabic "kayf" to Moroccan kif.
The word comes from the Arabic kayf, kīf in Maghrebi Arabic, which according to the Trésor de la langue française means "pleasure; well-being, health; joy", then the cheerful state caused by hashish, and finally hashish itself. French adopted it in several stages.
1670
First recorded as "Kaif", meaning "rest, well-being", in a translation of a history of the Ottoman Empire.
1789
The spelling "Kief" appears in a translation from Italian of the Letters of Abbot Sestini.
1857-1859
For the painter and writer Eugène Fromentin, "kief" refers to a mix of tobacco and Indian hemp.
1885
The form "kif" takes hold, notably with Alphonse Daudet.
In the Maghreb, kif traditionally means the dried flowers of a hemp variety, mixed with tobacco and smoked in a pipe. According to the EUDA, Morocco is still the main source of the cannabis resin found on the European market. Today, in shops and on grinders, "kief" mostly means trichome powder.
Your questions
What people ask us about kief.
What is kief?
It's the powder made of trichomes, the tiny resin glands on the flowers, which break off while grinding. You collect it at the bottom of a grinder fitted with a screen.
What's the difference between kief and pollen?
In everyday language, both words mean the same powder. But in the botanical sense, pollen comes from male plants, whereas kief is resin from female flowers.
How do you collect kief from a grinder?
You need a three- or four-piece grinder with a screen. The powder goes through the mesh and builds up in the bottom chamber, which you scrape out with a small scraper.
How should you store kief?
In a small airtight, opaque jar, somewhere cool and dry. Light and oxygen degrade cannabinoids, and all the faster because kief is a powder.
Can you make hash with kief?
That's the basic idea behind traditional hash: the trichome powder is compressed, often with heat, until it forms a resin. Careful: this also concentrates the cannabinoids.
What's the difference between kief and kif?
Both words come from the Arabic kayf, "well-being". In the Maghreb, kif means a mix of hemp and tobacco, while today kief mostly means trichome powder.
Is kief stronger than flower?
It concentrates the resin, so the cannabinoids and aromas, compared with the flower it comes from. That's why it's used in small amounts.
Sources
The references cited in this article.
- EUDA. EU Drug Market: Cannabis — Production.
- PLOS One (2021). Characterization of the Cannabis sativa glandular trichome proteome.
- Journal of Cannabis Research (2023). Glandular trichome development, morphology, and maturation are influenced by plant age and genotype in high THC-containing cannabis (Cannabis sativa L.) inflorescences.
- Photochemical & Photobiological Sciences (2024). Photodegradation of cannabidiol (CBD) and Δ9-THC in cannabis plant material.
- CNRTL, Trésor de la langue française informatisé. Definition and etymology of KIF (in French).
