
Professor Herb
Professor Herb Hemp Briquette Hash 3.5g
£13.99
In stock — dispatched today if ordered by 3pm
A 3.5g heat-pressed block of Italian hemp pollen, terpene infused, from a range running to fifteen flavours. Tobacco free and nicotine free. 18+ only.
- Free UK delivery on orders over £30
- Third-party lab-tested — COA on every batch
- Discreet plain packaging, no branding outside
- Sold to over-18s only, age-checked at checkout
Professor Herb Hemp Briquette Hash 3.5g is CBD hash: hemp pollen heat-pressed into a solid 3.5g block, infused with terpenes, from a range that runs to fifteen flavours. It arrives hard. That catches people out, because not one page currently selling this product tells you what to do with a pressed block, and the page ranking above all of them says the product is completely legal for a reason that does not actually follow. Both of those are fixed below, along with the full flavour list, which the top result promises and then does not give.
What a hemp briquette actually is
Hash is not a plant product in the way flower is. It is made from the resin, the sticky material that collects on the surface of hemp flowers and carries most of the plant's cannabinoids and aromatic compounds. Separate that resin from the plant material, and you have a powder often called pollen. Press the powder under heat, and you have hash.
The briquette is that last step done deliberately rather than by hand. Professor Herb describes it as a heat-pressed block of Italian hemp biomass pollen with its own terpene and flavour layer added, which is where the strain-style names come from. The pressing is what gives it the dense, faintly waxy character and the slow burn.
It is worth being clear about what this is not. It is not the loose milled blend the brand also sells, which is whole plant material rather than resin, and it is not one of the brand's 2g solid extracts, which sit in the same aisle under confusingly similar names and are made and rated differently. If you have compared the two and come away unsure, that is because nobody on the shelf explains the difference.
One packaging note. Two of the shops ranking for this product describe it arriving in a smell-proof resealable foil zip-lock pouch. The brand's current artwork shows something different: a hanging card with a small screw-top pot. The packaging appears to have changed and the retailer copy has not caught up, so do not be surprised if what arrives is not the pouch other listings describe.
| Specification | Detail |
|---|---|
| Format | Heat-pressed solid briquette |
| Weight | 3.5g |
| Base material | Italian-grown industrial hemp biomass pollen |
| Flavouring | Terpene infused, strain-inspired profiles |
| CBD content | Published by resellers as 175mg. The brand publishes no figure. See below |
| Nicotine | None |
| Tobacco | None |
| Flavours in the range | Fifteen, of which we carry thirteen |
| Testing | Third-party analysis with a QR code to the report on pack |
| Packaging | Hanging card with a screw-top pot on current brand artwork |
| Made in | United Kingdom and EU |
| Age restriction | 18+ only |
How to break one up without ruining it
This is the single largest gap on the whole search results page. Every listing we examined records no usage instructions at all. The brand says the product can be vaporised, cooked with or smoked, and then explains none of the three. A pressed block is genuinely unusable until somebody tells you this.
Do not try to crumble it cold. A cold briquette is hard and brittle, and forcing it apart shatters it unevenly and scatters fine powder across whatever you are working on, which is the material you actually paid attention to.
Warm it first, in your hands. Thirty seconds held in a closed palm is usually enough for body heat to soften the plant waxes and make the block pliable. You will notice the aroma lift as it warms, which is the terpenes becoming volatile and is a decent sign of freshness.
If hand warmth is not enough, pass a lighter flame near it rather than at it, briefly. The aim is to soften, not to cook. Direct sustained flame burns off the terpene layer that the whole flavour range is built on, and you will taste the difference immediately.
Aim for grains about the size of rice. That is the texture that mixes evenly and leaves enough air gaps to burn steadily. Crumbled too fine, it packs down, chokes the airflow and burns through far quicker than you expect. This is the most common mistake and it is easy to avoid once you know the target.
Two format notes. In a pipe or a bong bowl you need a screen, or the material simply falls through. In a dry herb vaporiser, the working range people generally use for concentrates of this kind is around 180 to 200 degrees Celsius, and pushing much beyond that starts destroying the aromatics rather than releasing them.

All fifteen flavours, and the two we do not stock
The page ranking first for this product announces that it comes in fourteen great flavours and then names exactly one of them. Only a single listing anywhere names the full set, and it is still one short of what the brand actually carries in this format.
There are fifteen. We carry thirteen. We do not stock Wedding Cake, and we do not stock the Orange Creamsicle limited edition, so if either of those is what you came for, we cannot help.
Because of how our catalogue currently holds this range, six of our thirteen are flavour options on this listing and seven are their own separate pages. That is a fault on our side rather than anything to do with the product, it is explained further down, and the table below tells you exactly where each one lives so you are not hunting.
On the flavours themselves: these are terpene and flavour layers added to the pressed pollen, not extracts of the strains they are named after. The base material has its own character underneath, warm and slightly sweet, and every flavour reads over the top of that rather than replacing it. The dessert profiles sit closest to the base, and the citrus profiles sit furthest from it.
| Flavour | Profile | Available here |
|---|---|---|
| Original | The unflavoured base, warm and resinous with a natural sweetness | Yes, on this listing |
| Lemon Haze | Sharp citrus peel, the brightest and least sweet of the set | Yes, on this listing |
| Grape Kush | Dark grape confectionery over the resin base | Yes, on this listing |
| Sour Blueberry Kush | Jammy blueberry with a genuine sour edge | Yes, on this listing |
| Strawberry Cough | Ripe, slightly creamy red fruit, the roundest profile | Yes, on this listing |
| Mango Sherbet | Tropical mango with a fizzy sherbet lift | Yes, on this listing |
| Bubba Gum OG | Sweet bubblegum against a heavier earthy base | Yes, as its own listing |
| Pineapple Express | Bright tart pineapple, listed by our distributor as Express | Yes, as its own listing |
| Forbidden Fruit | Mixed dark fruit, deeper and less sugary than Grape Kush | Yes, as its own listing |
| Gelato | Creamy dessert sweetness with a citrus lift behind it | Yes, as its own listing |
| Guava Dog | Tropical guava, softer and less sharp than the pineapple | Yes, as its own listing |
| Moonrock Cookies | Sweet biscuit and earth, the heaviest of the dessert profiles | Yes, as its own listing |
| Tangerine Dream | Rounded sweet orange rather than sharp citrus | Yes, as its own listing |
| Wedding Cake | Sweet vanilla and dough, the softest profile in the range | Not stocked |
| Orange Creamsicle | Orange and vanilla cream, a limited edition | Not stocked |
Where the 175mg figure comes from
Every reseller ranking for this product publishes 175mg of CBD per pouch. Professor Herb publishes nothing, on its product pages or on its range page, and the pack artwork carries only the words high strength.
The arithmetic is at least consistent for once. 175mg in 3.5g is exactly five per cent, which is the same concentration the brand's loose hemp blend runs at. Nobody on the search results page shows that working or connects the two products, but it does mean the reseller figure is internally coherent rather than invented.
We are not going to print it as ours. It is a number the manufacturer does not publish, on a product line where we have already found the packaging description out of date across two sites, and our position on this has been consistent: if the cannabinoid content is what decides your purchase, ask us and we will tell you what documentation we actually hold from our distributors. The pack carries a QR code to a third-party analysis, which is the right thing to read.
Hash, cannabis resin, and what UK law actually asks
The page currently ranking first for this product says it is completely legal because the hemp was grown under licence. That reasoning does not work, and on a hash product it fails harder than it does on anything else in this aisle. It is worth setting out properly.
Start with the definition. Under the Misuse of Drugs Act 1971, cannabis resin means the separated resin, crude or purified, obtained from any plant of the genus Cannabis, and cannabis resin is a named controlled drug. Hash is separated resin. That is not a technicality, it is what the word means.
So a compliant CBD hash product does not become lawful by pointing at the field it grew in. A Home Office industrial hemp cultivation licence covers the stalk, fibre and seed of the plant. Resin comes from the flower, which the licence does not cover. And the percentage figure that gets quoted everywhere governs what a licensed grower's standing crop may contain, which is a rule about farming rather than a rule about what may be sold to you.
The route that actually matters runs through the exempt product provisions in the Misuse of Drugs Regulations 2001, and it is about the finished product in your hand rather than the plant it came from. Central to it is the quantity test our whole site is built around: no more than 1mg of controlled cannabinoids, meaning THC, THCV and CBN, in the container, whatever the container's size and whatever percentage that works out at.
One practical point that no page selling this product makes, and that we think you should hear. A compliant hemp hash and a controlled cannabis resin are not distinguishable by eye, by smell or by a roadside test. That is worth knowing if you carry it about. Keep the pack, keep the QR code intact, and keep your proof of purchase with it. That is not us being dramatic, it is the single most useful thing anybody can tell you about buying hash in the UK, and the silence on it across the whole search results page is telling.
None of this says this product is non-compliant, and we are not suggesting it is. It says the reassurance you are being given elsewhere is not doing the work it appears to do, and that you are better off knowing the real test than a comfortable one.
Briquettes against the other solid hemp we stock
Solid formats in this aisle vary far more than the shared word hash suggests, and the differences are mostly about concentration and how much you use at once.
The briquette is the mildest and the most flavour-led of the group, which is exactly what makes it the sensible entry point. The solid extracts carry a stated percentage and are meant to be used in much smaller amounts. At the far end, a distillate concentrate is a different proposition altogether and needs equipment the others do not.
| Product | Weight | Stated concentration | Format | Note |
|---|---|---|---|---|
| Professor Herb Hemp Briquette Hash 3.5g | 3.5g | Resellers publish 175mg, which is five per cent | Heat-pressed pollen briquette | The mildest and most flavour-led. Fifteen flavours |
| Professor Herb Hemp Solid Extract 2g Bubble Hash 19% | 2g | 19 per cent | Solid extract | Roughly four times the concentration, in a smaller piece |
| Professor Herb Hemp Solid Extract 2g Hash 22% | 2g | 22 per cent | Solid extract | The strongest of the brand's own solid line |
| Euphoria Bubble CBD Hash 40% 1g | 1g | 40 per cent | Solid hash | A different brand and a considerable step up in concentration |
| Diamonds & Sauce Full Spectrum 95% 1.5g | 1.5g | 95 per cent | Crystalline diamonds in terpene sauce | The far end of the aisle, and it needs concentrate equipment |
| Professor Herb H4CBD Solid Extract 2.0g | 2.0g | Not comparable | Solid extract | H4CBD is a semi-synthetic hydrogenated cannabinoid, not CBD, and holds no Novel Foods authorisation |
Why some flavours appear as separate listings here
You will notice while browsing that six of these flavours are options on this page and seven are pages of their own. That is not deliberate merchandising and it is not a difference in the product. It is a fault in how our catalogue currently imports this range from our distributor, which supplies some of the flavours grouped and others individually.
Every one of them is the same 3.5g terpene-infused briquette from the same maker. The flavour is the only thing that changes.
We are telling you rather than quietly leaving you to work it out, and it is on our list to merge them into one listing. The table above is the map in the meantime, and the links at the foot of this page go straight to each of the separate flavours.
Who should not buy this
If you have no way to warm and crumble it, or no papers, pipe or vaporiser to use it in, this is the wrong purchase. It is raw material and it comes with nothing else. A pre-rolled option or a loose blend gets you further with less equipment.
If you want a stated milligram figure you can rely on, look elsewhere in the range. The maker publishes none for this format and we are not going to adopt a reseller's number as our own. An oil or an e-liquid gives you a figure printed by the manufacturer.
If you are used to concentrated extracts, this will feel mild. That is the design rather than a flaw, but if you were expecting something in the range of the solid extracts in the table above, you will be underwhelmed.
If you would rather not think about the legal position set out above, that is a fair reason to choose a different format. Oils, capsules, e-liquids and topicals do not raise the resin question at all, and our aisles are full of them.
And this is 18+ only. Not for anyone under 18, anyone pregnant or breastfeeding, anyone trying to conceive, or anyone on prescribed medication without speaking to their doctor first.
Frequently asked questions
- What is a hemp briquette and how is it different from CBD flower?
- A briquette is hemp resin rather than hemp plant matter. The resin that collects on the surface of the flowers is separated into a powder, often called pollen, then pressed under heat into a solid block. Flower is the whole plant material with the resin still on it. That is why a briquette is denser, burns more slowly and behaves completely differently when you handle it.
- How do you break up a Professor Herb hemp briquette?
- Warm it before you touch it properly. Thirty seconds held in a closed palm softens the plant waxes enough to crumble it cleanly, and the aroma lifting is your cue that it is ready. If body heat is not enough, pass a lighter flame near it rather than at it. Aim for grains roughly the size of rice, because anything finer packs down and burns through far too fast.
- How many flavours does the Professor Herb briquette hash range have?
- Fifteen, including Wedding Cake and an Orange Creamsicle limited edition. We carry thirteen of them and do not stock those two. The listing ranking first for this product claims fourteen and names only Original, and the one page that does list them all is still a flavour short of what the brand actually makes.
- How much CBD is in a 3.5g hemp briquette?
- Resellers publish 175mg per pouch, which works out at exactly five per cent, the same concentration as the brand's loose hemp blend. Professor Herb itself publishes no figure at all and the pack says only high strength. We are not adopting a number the maker does not print, so read the QR code on the pack and ask us what documentation we hold.
- Is CBD hash the same thing as cannabis resin under UK law?
- In definitional terms, yes, and that is the point people miss. The Misuse of Drugs Act 1971 defines cannabis resin as the separated resin obtained from any cannabis plant, and hash is separated resin. A compliant product gets there through the exempt product provisions in the Misuse of Drugs Regulations 2001, which turn on the finished product and the 1mg-per-container quantity test, not on where the hemp was grown.
- Why should you keep the certificate of analysis with CBD hash?
- Because a compliant hemp hash and a controlled cannabis resin look and smell the same, and there is no roadside test that separates them. Keeping the pack, the intact QR code and your proof of purchase together is simply sensible if you carry it around. No page selling this product mentions it, which is why we do.
- Do you need a screen to smoke hash in a pipe?
- Yes, in a pipe or a bong bowl, otherwise crumbled hash falls straight through the hole. A simple metal gauze sorts it. This is one of the small practical things that nobody selling a pressed block bothers to mention, and it is the difference between using the pouch and wasting some of it.
- Why does GoCBD list some briquette flavours as separate products?
- Because of how the range imports from our distributor, which supplies some flavours grouped together and others individually. It is a fault on our side rather than a difference in the product: every one is the same 3.5g terpene-infused briquette. We are working on merging them, and until then the flavour table on this page tells you where each one sits.
- What temperature should you vaporise hemp hash at?
- The range generally used for material of this kind is around 180 to 200 degrees Celsius. Going much hotter starts destroying the terpenes that carry the entire flavour rather than releasing them, which is the same reason you warm a briquette gently rather than holding a flame on it.
Updated July 2026
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