Evaluating Hemp Strains


CBD to THC Ratios

The question that needs to be answered is:”What percentage of CBD should be present when the THC percentage approaches the legal limit for this industrial hemp strain?” By testing for a strain’s CBD to THC ratio the answer to the question can be approximated with enough precision to confidently put a high CBD industrial hemp growing plan in place. It allows seed selection with a good level of insight as to how it will perform.

​Our research indicates that a cannabis strain’s CBD to THC ratio remains relatively stable throughout it’s growth cycle. Of course the same growing condition variables outlined on the home page can influence these ratio values too. Cannabis has proven to be an unbelievably vital species that is constantly adapting to its environment. The quality and quantity of a grower’s harvest will depend on latitude, the nutrient program, weather conditions, soil composition and quality, attention and care during growth plus all the other considerations that could be called good growing techniques. After that, the timing of the harvest and the methods for processing, drying and storing or processing of the flower will determine the final quality and quantity of oil.

At this very early stage in the industry, strains are not developed for different latitudes or weather conditions. Our strains are hybrids of cannabis sativa and cannabis indica, like any other high CBD hemp strain. They will grow vigorously in Florida as well as Maine. For each locality the seeds would have to be germinated and vegetated at the proper time of year for the proper amount of time and development and then planted in the field under favorable conditions. All of that is the grower’s responsibility.

Beyond that, as far as medical values go, a strain should be selected based on its full cannabinoid profile as well as its terpenoid profile. These tests results are available on this website for our Mountain Mango strain.

The CBD to THC Ratio Table

The table to the right shows the calculated CBD percentage of a hypothetical hemp test sample when the THC level reaches 0.3% for the following CBD to THC ratios.

​As an example, for a strain to yield a 15% CBD percentage in the field, its CBD to THC ratio would have to test around 50:1, extremely high and rare!

Tested CBD:THC Ratio Calculated CBD % at 0.3% THC
10:1 3.00
20:1 6.00
25:1 7.50
30:1 9.00
35:1 10.50
40:1 12.00
50:1 15.00
60:1 18.00
70:1 21.00
80:1 24.00
90:1 27.00
100:1 30.00
The small table the right illustrates the way a lab will typically report cannabinoid test profiles. This particular test from a very young plant showed a CBD to THC ratio of 19.5 to 1 (0.39/0.02). As it grows and matures, the THC and CBD levels will increase proportionally. When the THC level reaches 0.30%, the CBD level should be 5.85% (0.30 X 19.5).
Total Cannabinoids
Analyte Total*
THC 0.02%
CBD 0.39%
CBG 0.03%
CBC 0.02%
CBDV 0.01%
*Total is the sum of the neutral (active) cannabinoid and the completely converted acidic cannabinoid.

Knowing the CBD to THC ratio of the strains being planted and the consequent maximum CBD percentage yield possible under the law, rational business plans can be made. The amount of CBD produced can be calculated if the expected dried flower yield per plant is accurate. A simple formula: dried flower weight yield per plant X number of plants X tested CBD percentage = CBD yield. 100 plants with dry weight of 2 lbs. each testing at 7% CBD will yield 14 lbs of CBD in the extracted oil.

The processing or extraction method that is used to process your crop will determine the actual product that will be sold. In our opinion, high quality crops should be extracted with a state of the art ethanol extraction system, this will yield the purest full-spectrum oil. It will be about 80-85% CBD, the other cannabinoids, terpenes and flavonoids make up the rest of the yield (assuming the extractor removed the unwanted waxes, lipids and chloryphyll). In the above example, the 100 plants would yield around 16.5 lbs of full-spectrum oil, about 7.5 kilos or 7.5 liters (kilos and liters are pretty much equal for oil).

Timing is Everything

The trick in this whole matter is knowing when to harvest each strain in the field. It’s the difference between success and a complete wipe out (regulator mandated crop destruction).

​Whatever merits or pitfalls the current industrial hemp regulations possess, federal or state, as growers we are obliged to fully comply with them. Now, it’s all about the testing.

The only way to know when to harvest any strain in the field is to test, test, test. Simply put, when the THC level tests close to the legal limit, harvest the strain. All the nuances beyond that are up to the individual grower; how long to wait, how many tests to perform, how to gather your samples, how many days it will take to harvest the strain, etc. Read more about field and lab testing.

Our Strains

Mountain Mango

Mountain Mango is some of the sweetest hemp we’ve produced.  It sets bud really quick. Great calyx development, frosty and sticky.

Cherry Wine

A classic cross of The Wife X Charlotte’s Cherries.  With a sweet terpene profile, it will produce a high quality flower.

Leave a Reply

Your email address will not be published. Required fields are marked *