The short answer
Cannabis flower is the dried, cured bud of the cannabis plant. The buds hold cannabinoids like CBD and THC along with terpenes, the aromatic oils that give each batch its smell. In a CBD store, cannabis flower usually means hemp flower: cannabis grown to stay at or under 0.3% delta-9 THC by dry weight, with CBD as the main cannabinoid.
Cannabis flower vs. hemp flower: same plant, different chemotype
Hemp and marijuana are legal terms, not botanical ones. Both are Cannabis sativa L. The difference comes down to chemistry. Federal law defines hemp as cannabis with no more than 0.3% delta-9 THC on a dry weight basis. THC-dominant cannabis sits well above that line. CBD flower is bred for high CBD and low THC, so it produces little to no intoxicating effect for most people.
State law still matters. Hemp is federally legal, but some states restrict flower sales or require specific licenses. Check your state before you order.
How to read a lab test before you buy
A certificate of analysis (COA) is the receipt for a batch. I look for a few things:
- A batch or sample ID that matches the product label
- Total THC and total CBD numbers, not just the word hemp
- A terpene profile if the seller claims a strain-specific aroma
- Pesticides, heavy metals, microbials, and mycotoxins
- A testing lab that is not owned by the seller
Total THC is usually calculated as delta-9 THC plus THCA multiplied by 0.877. That conversion matters because THCA turns into THC when heated.
What to look for in the bud
Fresh flower smells like something. If the jar smells like hay or cardboard, the cure went wrong or the harvest is old. Good buds are sticky but not wet, with visible trichomes (the frosty crystals), a trim that leaves some sugar leaf, and a moisture level that springs back when you squeeze it instead of crumbling.
Ask for the harvest date. Flower peaks in the first few months after a proper cure, then loses terpenes over time. A two-year-old harvest is not a bargain.
Ways people use cannabis flower
Smoking and vaping are the fastest routes. A dry herb vaporizer runs cooler than a lighter and preserves more terpenes, though it still produces vapor, not smoke. For edibles, you need to decarboxylate first: heat the ground flower in an oven at about 240°F for 30 to 40 minutes to convert CBDA and THCA into CBD and THC, then infuse it into butter or oil. Skip that step and the edible does almost nothing. Flower also works in teas, but water does not pull cannabinoids well, so add a fat like milk or coconut oil.
Storing flower so it lasts
Keep buds in an airtight glass jar, out of direct light, at room temperature. A 62% two-way humidity pack keeps them from drying to dust. Do not use the fridge or freezer; condensation and freezer burn wreck trichomes. Label the jar with the strain and date.
A quick buying checklist
- Confirm the product is hemp flower with a current COA.
- Check total THC, not just delta-9.
- Look for a harvest date within the last six to nine months.
- Smell before you commit when buying in person.
- Know your state rules on hemp flower.