Hemp flower tea: what boiling water does, and does not do, to the bud

The short of it. You can make tea from hemp flower, but it behaves differently from smoking it. Boiling water is cooler than the temperatures that convert THCA quickly, and cannabinoids barely dissolve in water, so a cup is weaker and less predictable than people expect. Made with fat and simmered, tea from high-THCA hemp flower can still get you high, and it takes an hour or more to be felt.

Set Oct. 4, 2026.

☞ Heat: why a kettle is not a lighter

THCA turns into THC with heat, and the rate climbs steeply with temperature. A study at the University of Mississippi measured the reaction at 80, 95, 110, 130 and 145 °C and found it follows the same pattern at each, only faster as the heat goes up (Wang and colleagues, Cannabis and Cannabinoid Research, 2016). Water boils at about 100 °C at sea level, and lower at altitude. In a pot of simmering water, conversion is partial and slow. In a lit joint it is quick.

That is why the same flower feels different as tea. Some of the THCA stays THCA.

☞ Fat: why water alone falls short

Cannabinoids are oily molecules. In a classic study of THC’s physical properties, Garrett and Hunt measured its solubility in water at only a few milligrams per litre (Journal of Pharmaceutical Sciences, 1974). Most of what is in the bud stays in the bud, or clings to the pot.

Researchers in Leiden studied cannabis tea directly, varying boiling time, handling and storage to see what reaches the cup and what is lost (Hazekamp and colleagues, Journal of Ethnopharmacology, 2007). It is the paper to read if you want the numbers.

The practical upshot: brew with some fat. Whole milk, cream or a spoon of butter or coconut oil carries far more into the cup than water alone.

☞ A plain method

1. Grind a small amount of flower. Start smaller than you think: no home method tells you how strong the cup will be.
2. Simmer it for 15 to 30 minutes in a cup of water with a tablespoon of butter, or in milk. Do not let milk boil over.
3. Strain through a fine sieve or cloth.
4. Drink it fresh. Cannabinoids stick to the walls of a jug and break down as it sits.
5. Stir before pouring. The fat floats; the cannabinoids float with it.

☞ Timing: the most important part

Swallowed THC is slow. A standard review of cannabinoid pharmacokinetics puts the onset at 30 to 90 minutes after you swallow, with the peak at two to three hours and effects lasting four to twelve hours (Grotenhermen, Clinical Pharmacokinetics, 2003). Smoked THC arrives within minutes.

So if a cup seems to do nothing after half an hour, do not have another. Wait. Do not drive, and keep the tea and the flower away from children and pets.

☞ Which flower for tea?

Every packet on this shop’s menu is high-THCA hemp flower. Tea made from it is a THC drink: it can get you high and it will show up on THC drug tests. If what you want is a cup with little or no THC, this is not the flower for it, and no hemp flower is entirely THC-free (see Hemp flower with THC).

☞ The law

Hemp flower is regulated by what it contains, not by how you prepare it. Several states ban smokable hemp flower or high-THCA flower, and the shop blocks no address, so check your state’s law before ordering. From Dec. 11, 2026, federal law counts THCA toward the 0.3 percent hemp limit (Public Law 119-37, Sec. 781; date set by H.R. 6500, Sec. 2019). After that, this shop sells only flower that meets the new rule.

Adults 21 and over only. Not medical advice: if you take medicines or are pregnant, ask a doctor before using any cannabis product.