# Testing thc? After harvest **URL:** \ **Category:** Grow Cycle\ **Created:** [May 5, 2022, 8:07pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702 "2022-05-05T20:07:45Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Turtlehead](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/turtlehead/32/531309_2.png) [@Turtlehead](https://ilgmforum.com/u/Turtlehead)\ **Post date:** [May 5, 2022, 8:07pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/1 "2022-05-05T20:07:45Z")
How would I go about having flour tested for potency THC levels what is the process ---
**Author:** ![Breezy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/breezy/32/395747_2.png) [@Breezy](https://ilgmforum.com/u/Breezy)\ **Post date:** [May 5, 2022, 9:01pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/2 "2022-05-05T21:01:05Z")
I usually just smoke it and see if I melt into the couch šŸ˜‚ ---
**Author:** ![Dennis62](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dennis62/32/1072794_2.png) [@Dennis62](https://ilgmforum.com/u/Dennis62)\ **Post date:** [May 5, 2022, 9:03pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/3 "2022-05-05T21:03:07Z")
@Carpenter and @SilvaBack203 do testing šŸ˜ƒ maybe they can help ---
**Author:** ![VF](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vf/32/755229_2.png) [@VF](https://ilgmforum.com/u/VF)\ **Post date:** [May 5, 2022, 9:09pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/4 "2022-05-05T21:09:42Z")
You could give me some and Iā€™d tell you if it had a lot of THC or a little. ---
**Author:** ![beachglass](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/beachglass/32/683364_2.png) [@beachglass](https://ilgmforum.com/u/beachglass)\ **Post date:** [May 5, 2022, 9:31pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/5 "2022-05-05T21:31:32Z")
There seriously are a few thc testers on amazon. ---
**Author:** ![Carpenter](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/carpenter/32/617847_2.png) [@Carpenter](https://ilgmforum.com/u/Carpenter)\ **Post date:** [May 5, 2022, 9:34pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/6 "2022-05-05T21:34:50Z")
I usually do the same, take a few hitā€™s and see how how hard it hits backā€¦ šŸ˜‚ šŸ˜ TCheck has a device that tests the total cannabinoids with the THC being dominant. They donā€™t have a device yet that will check CBD though. Only THC Raw flower(non-decarbinated) Decarbed flower Infusion Winterized concentrate and maybe a few more! IMO @Turtlehead hope this helps. You do need the expansion pac to check raw flower if you decide to purchase it. šŸ‘ŠāœŒ ---
**Author:** ![Audiofreak](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/audiofreak/32/696429_2.png) [@Audiofreak](https://ilgmforum.com/u/Audiofreak)\ **Post date:** [May 5, 2022, 10:17pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/7 "2022-05-05T22:17:59Z")
I will make an exception for you as i dont know you but send me an ounce or three and i will test it and let you know! ---
**Author:** ![SilvaBack203](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/silvaback203/32/588262_2.png) [@SilvaBack203](https://ilgmforum.com/u/SilvaBack203)\ **Post date:** [May 6, 2022, 12:37am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/8 "2022-05-06T00:37:49Z")
Havent tested yet but i also have a tcheck ---
**Author:** ![MrPeat](https://avatars.discourse-cdn.com/v4/letter/m/73ab20/32.png) [@MrPeat](https://ilgmforum.com/u/MrPeat)\ **Post date:** [May 6, 2022, 1:07am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/9 "2022-05-06T01:07:12Z")
I have several taste testers in person as all weed tastes exactly the same for me. They do an amazing job for me and I donā€™t have to guess. ---
**Author:** ![DRsDank](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/drsdank/32/628580_2.png) [@DRsDank](https://ilgmforum.com/u/DRsDank)\ **Post date:** [May 6, 2022, 1:59am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/10 "2022-05-06T01:59:25Z")
Itā€™s not all about thc. Thc works with other cannabinoids. A lower thc can sometimes get you higher than a higher thc depending on those other cannabinoids. ---
**Author:** ![Graysin](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/graysin/32/546358_2.png) [@Graysin](https://ilgmforum.com/u/Graysin)\ **Post date:** [May 6, 2022, 2:00am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/11 "2022-05-06T02:00:49Z")
> [@Carpenter](#): > > TCheck has a device that tests the total cannabinoids with the THC being dominant. They donā€™t have a device yet that will check CBD though. Only THC The tcheck2 tests CBD if it is a CBD dominant strain. But it canā€™t really give the kind of breakdown a real lab test would. I donā€™t have a super helpful thought on how to test flower with a professional lab though. ---
**Author:** ![DRsDank](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/drsdank/32/628580_2.png) [@DRsDank](https://ilgmforum.com/u/DRsDank)\ **Post date:** [May 6, 2022, 2:19am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/12 "2022-05-06T02:19:55Z")
Tcheck is + - 15% ---
**Author:** ![Audiofreak](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/audiofreak/32/696429_2.png) [@Audiofreak](https://ilgmforum.com/u/Audiofreak)\ **Post date:** [May 6, 2022, 2:22am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/13 "2022-05-06T02:22:01Z")
15%Ɨ- isnā€™t that like close to Tarot Cards??? ---
**Author:** ![Graysin](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/graysin/32/546358_2.png) [@Graysin](https://ilgmforum.com/u/Graysin)\ **Post date:** [May 6, 2022, 2:26am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/14 "2022-05-06T02:26:43Z")
I think itā€™s actually + or - about 3% for flower testing. Close enough for my purposes. Itā€™s either ā€œover 20%ā€ or not. ---
**Author:** ![plumbdand](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/plumbdand/32/515126_2.png) [@plumbdand](https://ilgmforum.com/u/plumbdand)\ **Post date:** [May 6, 2022, 5:00am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/15 "2022-05-06T05:00:10Z")
I test potency/quality by pressing 7g of flower if I get 1.5g or more of rosin its good. Less than a gram its just ok or crap. May not be accurate but it a pretty good indicator. ---
**Author:** ![DRsDank](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/drsdank/32/628580_2.png) [@DRsDank](https://ilgmforum.com/u/DRsDank)\ **Post date:** [May 6, 2022, 5:39am UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/16 "2022-05-06T05:39:01Z")
> [@Graysin](#): > > think itā€™s actually + or - about 3% for flower testing. Close enough for my purposes. Itā€™s either ā€œover 20%ā€ or not. I had read that on another post somewhere here. Since you said that i decided to do some research. Tchech is accurate to Ā± 3% of an hlpc which is accurate to within Ā± 4.3%. That means to me it is accurate with in 7.3%. So in other words you are correct close enough. Just goes to show always do your own research. Thank you for the info. ---
**Author:** ![Graysin](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/graysin/32/546358_2.png) [@Graysin](https://ilgmforum.com/u/Graysin)\ **Post date:** [May 6, 2022, 2:16pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/17 "2022-05-06T14:16:58Z")
> [@DRsDank](#): > > That means to me it is accurate with in 7.3%. So in other words you are correct close enough. Thatā€™s a valuable correction to have. I have tested a few strains without ever really getting up over ~11% THC, which could mean as high as ~18%. But that all goes also to @Carpenter ā€™s point which is _only_ testing THC doesnā€™t equate to potency. I think @JaneQP and @Mr_Wormwood can probably verify but seems highly unlikely that Frosted Jungle - the strain that tested right around 11% - is ā€œweakā€ from a smoking standpoint. > [@DRsDank](#): > > Just goes to show always do your own research. Thank you for the info. Absolutely. I learned from @Tylersays that the things I need to know can be good to get the gist from the forum but the real nerdy in-depth knowledge is often lurking with other sources. Thank you for doing the legwork on the tCheck research and following back up with us! > [@plumbdand](#): > > pressing 7g of flower if I get 1.5g or more of rosin its good. Less than a gram its just ok or crap. Honestly thatā€™s not a terrible practice either. I would do a QWET wash with trim and the yield from the trim usually tells me enough. At this point though itā€™s all blended together in a 5gal grove bag so I have no hope of figuring out which one of 20 plants was the best yielder šŸ˜‚ pressing probably makes more sense. ---
**Author:** ![Carpenter](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/carpenter/32/617847_2.png) [@Carpenter](https://ilgmforum.com/u/Carpenter)\ **Post date:** [May 6, 2022, 6:36pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/18 "2022-05-06T18:36:28Z")
Excellent break down @Graysin I have the Tcheck2 and I believe your right about the CBD being dominant. My wife gave it to me because it wasnā€™t suitable for CBD. Info from the company! Does what I need it to do for myself. And yes donā€™t take anyoneā€™s word for anything always do your own research šŸ§. Plus you gain knowledge a win win! šŸ¤Ÿ ---
**Author:** ![JaneQP](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/janeqp/32/555131_2.png) [@JaneQP](https://ilgmforum.com/u/JaneQP)\ **Post date:** [May 6, 2022, 6:38pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/19 "2022-05-06T18:38:40Z")
Having spent many years in laboratories - analytical uncertainty is a real thing. The messier the matrix the more uncertainty due to interference. If you painstakingly go through error analysis of every step in the process from purity of standards, pipettes, balances, etc. it adds up. I never understood why defense lawyers on DUI cases didnā€™t grab this concept to argue that the client may have actually been below the limit. Laboratory QC has acceptable limits for QC that vary from, 10-50% as acceptable depending on the analyte of interest. ---
**Author:** ![Newt](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/newt/32/688722_2.png) [@Newt](https://ilgmforum.com/u/Newt)\ **Post date:** [May 6, 2022, 7:24pm UTC](https://ilgmforum.com/t/testing-thc-after-harvest/86702/20 "2022-05-06T19:24:20Z")
> [@JaneQP](#): > > I never understood why defense lawyers on DUI cases didnā€™t grab this concept Likely has to do with the fact that getting a law degree does _ **not** _ require much lab analyticsā€¦ Just a thought. [Next page](https://ilgmforum.com/t/testing-thc-after-harvest/86702.md?page=2)