Walking into the cannabis market for the first time can feel like learning a new language. Terpenes, cannabinoids, indica, distillate, 510-thread — the terminology gets thrown around constantly, and not every retailer takes the time to explain what any of it actually means.

This guide cuts through the jargon. Here are 8 essential cannabis terms every new buyer should understand before making their first purchase — explained clearly, without the fluff.

1. Cannabinoids

Cannabinoids are the naturally occurring chemical compounds found in the cannabis plant that interact with your body’s endocannabinoid system — a network of receptors in the brain, nervous system, and immune system that regulates mood, pain, sleep, and appetite.

Over 100 cannabinoids have been identified in cannabis, but two dominate the conversation:

THC (tetrahydrocannabinol) is the primary psychoactive cannabinoid — the one responsible for the high. THC percentage is displayed on every legal cannabis product in Canada and is the most widely used indicator of potency.

CBD (cannabidiol) is non-psychoactive. It produces no high regardless of the dose and is associated with potential wellness benefits including pain relief, reduced anxiety, and improved sleep. CBD products are popular with users who want the therapeutic properties of cannabis without any impairment.

Understanding the THC and CBD content of a product before you buy is the single most important habit a new cannabis buyer can develop. All products at The Purple Leaf display accurate cannabinoid percentages on every listing.

2. Terpenes

Terpenes are the aromatic compounds found in cannabis — and in thousands of other plants — that give each strain its distinctive smell and flavour. The sharp citrus of one strain, the earthy pine of another, the sweet berry notes of a third — these are all terpene profiles at work.

But terpenes do more than smell good. Research suggests they interact with cannabinoids to shape the character of the overall experience — a concept sometimes called the entourage effect. For example, the terpene myrcene (common in many indica strains and associated with sedation) is one reason why two strains with identical THC percentages can produce noticeably different effects.

Common terpenes you’ll encounter in cannabis:

• Myrcene — earthy, musky, associated with relaxation and sedation
• Limonene — citrusy, associated with mood elevation and energy
• Caryophyllene — spicy, peppery, associated with stress relief
• Pinene — pine-scented, associated with alertness and mental clarity
• Linalool — floral, lavender-like, associated with calm and anxiety reduction

When two products have similar THC percentages and you’re not sure which to choose, the terpene profile is often the deciding factor for experienced buyers.

3. Indica, Sativa, and Hybrid

These three terms are the foundation of how cannabis strains are categorised and sold across Canada.

Indica strains are associated with relaxing, body-focused effects — popular for evening use, sleep, pain relief, and unwinding after a long day.

Sativa strains are associated with uplifting, cerebral effects — popular for daytime use, creativity, focus, and social situations.

Hybrid strains are a cross between indica and sativa genetics, designed to blend characteristics of both. Most cannabis on the legal Canadian market today is some form of hybrid.

In practice, the indica/sativa distinction is a useful starting point rather than a precise science — the full effect of any strain is shaped by its complete cannabinoid and terpene profile. But as a framework for making purchase decisions, it remains the most practical shorthand available to new buyers.

The Purple Leaf organises our entire flower menu by indica, sativa, and hybrid so you can filter immediately to the experience you’re looking for.

4. THC Percentage

THC percentage refers to the concentration of THC in a cannabis product, expressed as a percentage of total weight. It is the primary potency indicator on legal cannabis packaging in Canada and the most widely referenced number when comparing products.

As a general guide for new buyers:

• Under 15% THC — mild, manageable, well suited to first-time users and those sensitive to THC
• 15–20% THC — moderate potency, the sweet spot for many recreational users
• 20–25% THC — high potency, better suited to experienced users with established tolerance
• Above 25% THC — very high potency, not recommended for new or occasional users

It’s worth repeating the point from earlier: THC percentage is not the only measure of quality. A 17% THC strain with a rich terpene profile and excellent cultivation can easily outperform a 27% THC product that was grown and processed carelessly.

For new buyers, starting under 15% THC regardless of consumption method is the safest, most comfortable entry point.

5. Concentrates

Concentrates are cannabis products made by extracting the cannabinoids and terpenes from the plant material, resulting in a highly potent end product. While flower typically ranges from 15–30% THC, concentrates commonly reach 60–90% THC — making them significantly more intense than anything in the flower category.

Common types of cannabis concentrates available at The Purple Leaf:

• Shatter — a hard, brittle, glass-like concentrate with high THC content
• Live resin — extracted from freshly frozen plants, preserving the full terpene profile
• Hash rosin — a solventless extract prized for purity and flavour
• Distillate — highly refined oil with very high THC content, widely used in vape cartridges
• Crumble — a dry, crumbly concentrate with a texture similar to brown sugar
• Hash — one of the oldest forms of cannabis concentrate, made by compressing trichomes

Concentrates are best suited to experienced cannabis users who are comfortable managing high-potency products. New buyers are generally advised to start with flower or low-dose edibles before exploring concentrates.

6. Edibles

Edibles are cannabis-infused food and drink products — gummies, chocolate, baked goods, capsules, drinks, and more. They are one of the most popular product categories in the legal Canadian cannabis market, particularly among users who prefer not to smoke or vape.

The key thing every new buyer must understand about edibles is the onset time. Unlike smoking or vaping, which deliver effects within minutes, edibles are processed through the digestive system and typically take 30 minutes to 2 hours to take effect. The resulting experience is also generally more intense and longer-lasting than inhaled cannabis.

The most common mistake new edibles users make is consuming more because they don’t feel anything after 45 minutes — and then having both doses hit simultaneously. Always start with a low dose of 2.5–5 mg THC and wait a full two hours before considering more.

Edible products at The Purple Leaf clearly display THC and CBD content per serving, making it straightforward to manage your dose accurately.

7. Pre-Rolls

A pre-roll is simply a pre-rolled cannabis cigarette — a joint that has been rolled and packaged by the retailer, ready to smoke straight out of the package. No grinding, no rolling, no preparation required.

Pre-rolls are one of the most convenient cannabis products available and a popular choice for new buyers who want a familiar format without the learning curve of rolling their own. They come in a wide range of strain options — indica, sativa, and hybrid — and in various sizes from single-serving to larger formats.

A step up from the standard pre-roll is the Moon Rocket — a densely packed, concentrate-infused pre-roll that delivers significantly more potency than a regular joint. Moon Rockets are not recommended for new or low-tolerance users.

Pre-rolls are available in our full strain selection and are a great way to try a new strain without committing to a larger quantity of flower.

8. 510-Thread

If you’re considering cannabis vaping, you’ll encounter the term 510-thread almost immediately. It refers to the industry-standard connection type used by the vast majority of cannabis vape batteries and cartridges — a threaded fitting with a 5mm diameter and 10 threads per centimetre (hence 510).

In practical terms, this means that any 510-thread cartridge will fit any 510-thread battery, regardless of brand. It’s a universal standard that gives you complete flexibility when mixing and matching batteries and cartridges.

When shopping for vaping products, look for:

• 510-thread battery — the reusable device that powers the cartridge. Rechargeable via USB, lasts months to years with normal use.
• 510-thread cartridge — the replaceable tank pre-filled with cannabis oil (distillate, live resin, CBD, etc.). Screws onto the battery and is discarded when empty.

This two-component system offers better value over time than disposable vapes for regular users, and access to the full range of oil types and strain options available on the legal Ontario market.

Putting It All Together — A Quick Reference

• Cannabinoids — the active compounds in cannabis (THC gets you high, CBD does not)
• Terpenes — the aromatic compounds that shape smell, flavour, and effects
• Indica / Sativa / Hybrid — the three categories of cannabis strain by effect profile
• THC percentage — the primary potency indicator; start under 15% as a new buyer
• Concentrates — high-potency extracts for experienced users (60–90% THC)
• Edibles — cannabis-infused food products with delayed onset and longer-lasting effects
• Pre-rolls — pre-rolled joints ready to smoke straight from the package
• 510-thread — the universal connection standard for cannabis vape batteries and cartridges

Frequently Asked Questions

What is the difference between THC and CBD? THC is the psychoactive compound in cannabis that produces the high. CBD is non-psychoactive and is associated with wellness benefits including pain relief and reduced anxiety. Both are legal for adults 19+ in Ontario from a licensed retailer like The Purple Leaf.

What is the best cannabis product for a first-time buyer? A low-THC hybrid flower (under 15% THC) or a low-dose edible (2.5–5 mg THC) are the most commonly recommended starting points for new buyers. Our team at The Purple Leaf is available 7 days a week to help you find the right product — call 519-777-9498.

What is a safe THC percentage for a beginner? Under 15% THC is the recommended starting range for first-time and occasional cannabis users. This applies to flower, vapes, and any other inhaled product.

Are cannabis concentrates suitable for beginners? No. Concentrates reach 60–90% THC and are best suited to experienced users with established tolerance. New buyers should start with flower or low-dose edibles before exploring concentrates.

Where can I buy legal cannabis products in London, Ontario? The Purple Leaf is a fully licensed cannabis retailer serving London, Ontario and shipping Canada-wide. Browse our full menu at thepurple-leaf.com or call 519-777-9498 any day between 9 AM and 9 PM.

Shop at The Purple Leaf — We’ll Help You Find the Right Product

Now that you’ve got the vocabulary down, shopping for cannabis should feel considerably less daunting. Whether you’re buying for the first time or exploring a new product category, The Purple Leaf has the selection, the knowledge, and the service to point you in the right direction.

Visit thepurple-leaf.com or call 519-777-9498 any day of the week between 9 AM and 9 PM.

The Purple Leaf — London, Ontario’s trusted cannabis dispensary. Licensed, tested, knowledgeable. Local delivery available. Ships across Canada.