What Kief Is
Kief is the loose resin that breaks off cannabis flower when you handle it or grind it. That resin comes from trichomes, the glands where the plant makes and stores cannabinoids and terpenes. A 2020 study in The Plant Journal compared stalked and sessile glandular trichomes on cannabis flowers and tied the stalked type to high cannabinoid levels.
What that means at your table: a pinch of kief is a lot of the flower packed into very little volume. You can’t judge a kief dose by eye the way you can with a bud. If you take one habit from this guide, make it this one: weigh it.
Three Ways to Collect Kief
| Method | Effort | What you get | Good for |
|---|---|---|---|
| Three-chamber grinder | Almost none | Small amounts over time, some plant bits mixed in | Anyone who already grinds |
| Chill, then grind | Low | The same grinder catch, from flower that was cold first | People who want a bit more from each batch |
| Sift box | Medium | Cleaner, lighter-colored powder | Collecting enough to infuse |
Grinder with a kief catcher
Grind as usual, let the grinder sit a few minutes so the powder settles through the screen, then tap the bottom chamber over a flat surface and brush it out. Keep a small jar for it. Grinder kief builds slowly, and a jar that fills over weeks is how most people end up with enough to cook with.
Chill first
Cold resin is brittle, which is why trichome heads break off more easily when flower has spent a few hours in a sealed bag in the freezer. Use dry, cured flower, break it into chunks, and grind it straight from the cold. We haven’t measured the yield difference ourselves, so treat “more kief” as a reasonable expectation, not a number.
Sift box
A box with a fine mesh screen on top does the same job with more control. Gently shake broken-up flower over the mesh and scrape what falls through. Go gently: hard shaking pushes plant material through the screen. As a rule of thumb, lighter and more golden powder is cleaner, and darker green powder has more leaf in it.
Kief Dosing: A Worked Example
Kief doses are easy to get wrong because the numbers are bigger than they look. Say your kief’s lab label reads 50% total THC (a made-up number for the math, so read your own label). Labels usually report total THC, which already applies the 0.877 weight factor for THCA losing its carboxyl group, so a fully activated gram can’t exceed what the label says.
- 1 g of kief = 1,000 mg. At 50%, that’s up to 500 mg of THC.
- 0.1 g of kief = 100 mg. At 50%, that’s up to 50 mg of THC.
- The same 50 mg of THC takes 0.25 g of flower at 20% total THC.
Now spread 0.05 g to 0.5 g of that kief across a batch of 12 edibles:
| Kief in the batch | THC in the batch (ceiling) | Per serving, 12 servings |
|---|---|---|
| 0.05 g | 25 mg | about 2 mg |
| 0.1 g | 50 mg | about 4 mg |
| 0.25 g | 125 mg | about 10 mg |
| 0.5 g | 250 mg | about 21 mg |
These are ceilings. Some potency is lost in the oven, in the butter and in the strainer, so real servings land lower. That’s a good reason to start at the small end and work up on a second batch. If you’re new to edibles, our guide to edible dosing mistakes covers where people tend to start and what goes wrong, and the Cannabutter Dosing Calculator on the recipe wizard takes a THC percentage and a per-serving dose, so you can check your math against someone else’s.
Decarb Before You Infuse
Raw kief is mostly THCA, which isn’t the form you’re after in an edible or a tincture. Heat converts it. In a 2016 lab study of acidic cannabinoids in Cannabis and Cannabinoid Research, THCA fell to near zero in 30 minutes at 110°C (230°F), 9 minutes at 130°C (266°F) and 6 minutes at 145°C (293°F). The researchers used a vacuum oven to keep oxygen and light out, which your kitchen oven does not, and home ovens often run 10 to 25°F off their dial. That’s why our decarboxylation guide builds in margin with 240°F for 40 minutes for flower.
For kief:
- Spread it in a thin layer on parchment so heat reaches all of it.
- Check the time with the decarb calculator, which has a separate kief setting, and use an oven thermometer.
- Watch the color. Kief that has gone dark brown ran too hot.
You only need this step for edibles, infusions and tinctures. Sprinkled on a joint or a bowl, kief gets its heat when you light it, so it doesn’t need to be decarbed first. If you want the lower-temperature argument for kief and hash, we cover it in decarb temperature for kief and hash.
Four Ways to Use Kief
On a joint or bowl
Roll the joint with a little room at the top, add a thin layer of kief, and finish. In a bowl, a light layer over the top works. This is the fastest way to use kief, and the easiest way to overdo it. Add less than you think, wait, and then decide on more.
In edibles
Infuse the decarbed kief into butter or oil on low heat, strain, and cook as normal. The cannabutter guide has the infusion temperatures and ratios, and you can swap kief in for flower once you’ve done the weight math above. Remember the timing: an edible and an inhaled dose are not on the same clock. A review of human cannabinoid pharmacokinetics in Chemistry & Biodiversity puts the bioavailability of ingested THC as low as 4% to 20%, against a much wider and often higher range when smoked (reported as 2% to 56% because it depends so heavily on technique), and describes slower, more delayed absorption after eating. Same kief, very different session. Why edibles take so long to kick in explains how to plan around that.
In a tincture
Decarb the kief first, then steep it in high-proof alcohol in a sealed glass jar, shaking now and then, and strain through cheesecloth into a dropper bottle. High-proof alcohol is flammable, so keep it away from the stove and any open flame. For ratios and sublingual use, see our guide to cannabis tinctures.
Layered with concentrates
Coating a concentrate in kief stacks potency on potency. Count the two as a single dose and start with the smallest amount you can measure. If concentrates are new to you, Concentrates 101 is the place to start.
Log Kief Separately From Flower
Kief changes the shape of a session. The same strain can feel like a different night once kief is on top, which makes it hard to learn from if it all goes into one entry as “the usual.” A simple way to keep the signal clear:
- Pick the vibe first. Decide what you’re going for (Relax, Focus, Creative, Sleep, whichever fits) before you consume. In DankLog’s Log Session screen, that’s the “What are you going for?” step.
- Write the amount down. The Amount field is optional and its smallest preset is 0.1g, so put your real pinch weight in Notes. Add the word “kief” there too.
- Note the method. A joint, a bowl and a vape are different sessions. Pick the closest method, and use “Eaten” for anything infused.
- Rate it afterward. Then compare the same strain with and without kief across a few sessions.
If you are layering one strain’s kief onto a different strain’s flower, strain pairing walks through how to think about combinations. And if your sessions have been creeping up in strength, the tolerance calculator is a quick way to see where your habits put you.
Storing Kief
Keep it in an airtight glass jar in a cool, dark place. Kief is fine and sticky, so a small, full jar is easier to manage than a big, half-empty one. If you do not plan to use it within a few weeks, label the jar with the strain and the date so that you can tie it back to your session notes.
The Short Version
- Weigh kief. Don’t estimate it by eye.
- Do the milligram math from the lab label before you infuse.
- Decarb only for edibles and tinctures, not for joints and bowls.
- Log kief sessions separately so you can see what it does to your vibe.
Happy experimenting.
