Last checked: October 21, 2026
Twist open a grinder after a few weeks of use and there it is: a fine, sandy layer of gold-green powder sitting under the bottom screen. Somebody at the table always says the word like a password. So, what is kief, really? It's the loose resin that falls off cannabis flower, collected before anyone presses it into anything. That's the whole trick. No mystery, no lab coat. This guide is for adults 19 and over, and it sticks to three questions: what kief is, how it differs from hash, and how the law and the label treat it.
Start with the trichome
Get close to a dried bud and you'll see a frosty coat. That frost is made of trichomes: tiny hair-like glands on the surface of the flower, each topped with a little bulb of resin. Those resin heads are fragile. Shake the flower, rub it or roll it across a fine screen, and the heads snap off and fall away as dust.
Collect enough of that dust and you have a pile with its own name. People call it kief, keef or dry sift. "Dry" because no water or solvent was involved, "sift" because screens did the sorting. Different slang, same stuff: loose trichome resin, separated from the plant by mechanical action.
What is kief, in one sentence?
Kief is loose, unpressed trichome resin that has been knocked or sifted off cannabis flower. It looks like powder, it pours like fine sand, and it stays loose until someone does something to it.
That last part matters, because the moment kief gets compacted, it starts going by a different name.
Kief vs hash: loose vs pressed
Here's the cleanest way to settle kief vs hash:
- Kief is the loose powder. Nothing has been done to it beyond collecting it.
- Hash is resin that has been compressed into a solid: a block, a slab, a coin, a ball. Pressure and handling turn the powder into something you break rather than pour.
Same raw material family, different form. Think flour vs dough. The difference you can feel in your fingers is texture: kief drifts and spills, hash holds its shape. What neither word tells you is how much THC is inside. That number lives on the package, not in the name.
We're keeping this to the loose-vs-pressed split on purpose. Hash has its own family of style names on menus, and that's a separate conversation. This one is about the dust.
Where the law puts kief
Here's the part most kief explainers skip. In Canada, kief is not "dried cannabis", even though it comes straight off dried flower.
The Cannabis Act defines dried cannabis as any part of a cannabis plant that has been subjected to a drying process, other than seeds. Kief is something else. In an August 2021 notice to the industry, Health Canada said that mechanical extraction of trichomes from fresh or dried cannabis "by sifting, beating, rubbing and other mechanical actions", which produces "cannabis extracts such as kief or hashish", is considered a cannabis extract under the Cannabis Regulations.
Health Canada's consumer guide to labels says the same thing in shopper language: its list of product classes puts kief, hash, resin, rosin, wax and shatter under cannabis extracts. So when you see kief or hash on a legal shelf, expect the class line on the label to read "cannabis extract", not "dried cannabis".
No screen, no solvent, no heat? Doesn't matter. Separating the resin from the plant is what moves it into the extract class.
Reading a kief or hash label
The menu name gets your attention. The label tells the truth. Under the Cannabis Regulations (section 123) and Health Canada's label guide, a legal package has to show:
- The class of cannabis. For kief and hash, look for "cannabis extract".
- Total THC and Total CBD. Front of the label. These are the only numbers that speak to cannabinoid content. A golden colour or a fancy name doesn't.
- Net weight. How much is actually in the container.
- A list of ingredients. Health Canada says extracts must carry one, with food allergens listed.
- Lot number and packaging date. Handy if you ever need to contact the producer about a quality problem.
- Recommended storage conditions. Follow what's printed.
- "KEEP OUT OF REACH OF CHILDREN", the yellow health warning box, and the standardized cannabis symbol on anything over 10 micrograms of THC per gram.
If the menu title and the class line ever seem to disagree, trust the class line.
How kief shows up on a menu
On a legal menu, kief and hash don't sit with the flower. They live in the concentrates section, alongside the other extract-class products. Menus rotate, so we won't promise what's on the shelf on any given day. If kief is what you're after, ask at the counter and check the package class before you pay.
One more thing to know: weight math works differently for extracts. Ontario's public limit is 30 grams of dried cannabis or the equivalent, and the province's own conversion puts 0.25 grams of concentrates at the same weight as 1 gram of dried flower. A small jar of kief eats into that limit fast, so add everything up before you leave with a mixed bag.
Quick answers
What is kief made of?
Trichome resin heads separated from the flower, loose. Sometimes fine plant bits come along for the ride.
Is the powder in my grinder kief?
That catch-screen layer is loose resin knocked off your own flower, so yes, that's the same kind of material people mean by kief.
Kief vs hash: does the name tell you anything about THC?
The name doesn't tell you. Read Total THC and Total CBD on the label of the exact package.
Is kief legal to buy in Ontario?
Ontario sets the minimum age at 19 to buy, use or possess recreational cannabis, and kief sold legally falls in the cannabis extract class.
Finch Mall House: let the label do the talking
At Finch Mall House we'd rather spend the words on the stuff that matters: what's in the jar and what the label says. Now you know what is kief, where it sits on a legal menu, and why the class line reads "cannabis extract". Bring valid ID (19+), ask to see the package, and read it before you buy. Directions and walk-in notes are on our visit page.