Medicinal Cannabis Flower: How to Check Quality and Prepare It for Your Vaporiser

Medicinal cannabis flower can work beautifully in a dry herb vaporiser - if the flower is good quality and properly prepared. Below is a practical guide to checking it and preparing it.

1. How to check the quality of your flower

Even with regulated products, handling and storage can affect quality. When you first open the container, check:

a) Appearance (visual check)

• Colour: healthy medicinal flower is usually green with orange/brown pistils. Very dark, brown, or dull-looking flower can indicate age or poor curing.
• Trichomes: look for a light "frosting" - these are the resin glands that contain cannabinoids and terpenes.
• No seeds/stems in excess: a couple of stems is normal, but a jar full of stemmy material is lower quality.

b) Aroma (terpenes)

Open the jar and take a gentle smell.

• You should notice a distinct, plant-based aroma (citrus, pine, herbal, earthy - depends on the strain).
• No smell can mean it's too dry or old.
• Off, musty, or "wet cupboard" smell → don't use it. Contact the supplier/pharmacy.

c) Moisture level

Vaporisers need slightly moist, not wet, not bone dry flower.

• If it crumbles to dust immediately → too dry.
• If it feels spongy or damp → too wet (harder to vape evenly).
• Ideal: breaks apart but still a little springy.

If your product seems unfit for use (mould, contamination, broken seal), contact your pharmacist or your Medio prescriber.

2. Storage to protect quality

To keep your flower vape-ready:

• Store in original container (often opaque/child-resistant).
• Keep in a cool, dark place (not bathroom, not car, not window).
• Avoid the fridge/freezer (can damage trichomes and invite condensation).
• If you live in a very dry climate, ask your pharmacist about a humidity pack (58-62%).

3. Preparing flower for your vaporiser

Step 1: Weigh or measure your dose

Follow the dose your prescriber gave you. If you were given a range (e.g. 0.05-0.1 g), start at the lower end and titrate slowly.

Step 2: Grind the flower

Use a herb grinder (not kitchen scissors if you can avoid it).

Aim for a medium-fine grind:

• Too coarse → poor extraction.
• Too fine/powdery → can clog some vaporisers.
• Some devices prefer a fluffier grind - check your device manual.

Step 3: Load the chamber correctly

Gently fill the oven/chamber.

• Don't overpack - warm air has to move through the plant material.
• Light tamp is okay, but don't compact it unless your device recommends it.
• How firm the pack should be depends on how your device heats. Devices that heat the flower by contact with a hot chamber want firm, even contact; devices that heat it with moving air want a looser load. See convection vs conduction for how to tell which you have.

Step 4: Set the right temperature

The temperature you set depends on the effect you are after, and it takes some trial and error.

One thing to clear up first, because most charts get it wrong: you cannot pick out a single terpene with the temperature dial. Terpenes are released across a broad range rather than switching on at their boiling point, so every setting gives you a mixture. What the dial actually controls is the balance: the quickest-releasing compounds low, and the slower-releasing ones plus more THC as you climb. The quickest terpenes are also released early, so how far through the dose you are matters as much as the number.

Lower settings (170°C to 185°C)

• Full release of most of your terpenes: pinene, myrcene, limonene, terpinolene and linalool
• Proportionally less of the two slowest to release, caryophyllene and humulene
• Low release of THC, so more flavour and a milder effect
• Less harsh on the throat

Higher settings (195°C to 210°C)

• Those same terpenes, still fully released, plus more caryophyllene and humulene
• Higher release of THC, so a stronger effect and less aroma
• Vapour may feel warmer, so make sure your device is clean
• Above 220°C terpenes and cannabinoids degrade faster, and you gain nothing

Most patients settle between 180°C and 205°C. Temperature is part of your dose: begin at the lower end and raise it only if your symptoms are not adequately controlled.

5. How to tell it's "spent"

A well-vaped flower (often called "ABV" - already-been-vaped):

• Turns light to medium brown
• Loses most of its aroma
• Produces very little vapour even at higher temps

If the flower turns black → it's too hot, close to combustion. Drop the temperature.

If it comes out darker at the edges and greener in the middle, the heat reached the outside of the load first, which points to contact heating that needs stirring between draws rather than a hotter setting. There is more on reading your spent flower and what each pattern is telling you.

6. Common problems (and fixes)

"I'm not getting vapour." → Grind a bit finer, check battery, raise temperature slightly, don't overpack.

"It's too harsh." → Lower temperature, check moisture (not bone dry), clean the mouthpiece.

"It tastes bad." → Clean your device, use fresh flower, check for overcooking (too high temp).

7. Safety and legality in Australia

Use only your prescribed medicinal cannabis.

Don't drive if impaired or if prescribed a product containing THC. Make sure you read our post on the driving laws in Australia.

If you develop dizziness, anxiety, chest symptoms, or interact with other meds, contact your prescriber.