Koffee Seed List

CHA is excited to offer a bunch of new crosses coming out of the Koffee lineage. Koffee (Alien OG x Alien Kush).


The Koffee originated from Kaya. It was named Kaya’s Koffee and subsequently given to a few breeders. Nick from Greensource Gardens took it all the way to Koffee F8. CHA was able to procure the seeds from Nick directly at a seed swap. The Koffee breeding project through CHA is using the Koffee F8 from Greensource Gardens.

Koffee is a THC dominant variety often chosen to treat conditions such as depression, chronic pain, mood swings, chronic fatigue, and chronic stress. This F8 flower has a super pungent aroma of a chocolate/kushy spice and pine/citrus with mint. Almost smells like Eucalyptus. Very complex, nicely intoxicating

Koffee Seed List
Koffee Seed List

Main Instagram Account Suspended !!!


Instagram is at it again, and has suspended CHA’s main account

Please follow CHA’s backup up account: @cha_humboldt



Cannabis Seeds Available Now on CHA Website!!!

Seed List 2022 - Cannabis Horticultural Association

Some of the Best Deals for Elite Genetic Crosses!!!

$100 for 25 seeds

Living in Humboldt County for the past 15 years has provided the CHA access to world class genetics that has helped develop a unique library of flavors for both flower and concentrates. These genetics will contain award-winning phenotypes, it’s up to you to grab a few packs and hunt them out to find the winners. That is why we have included 25 seeds in most packs, this gives you the ability to have a larger group to hunt from. The quality of the flowers will match any other famous breeders but at a fraction of the cost. Some of the pictures below are from our Slapz and Tropaya Lines (photos of outdoor grown flowers) Check out the seeds page to learn more.

Also Don’t Sleep on the Lemon Hashplant Line!!!!

The Lemon Hashplant line was a 2022 project in conjunction with a local Humboldt farmer/breeder. A large number of male seeds were grown out from Bodhi seeds Lemon Hashplant (Lemon G x 88 G13. 2 select males were chosen for smell, structure and vigor and used in an open pollination project with a select group of elite award winning genetics. The crosses that come out of this line are sure to win some awards. These seeds are now available for purchase on the website #CHAnetics

Understanding The Role of Silicon in Plant Health

When most people think about fertilizing plants, they think about the major nutrients like nitrogen, potassium, phosphorus, calcium and magnesium. And there are quite a few other micronutrients that all play important roles in plant health, but arguably there is no other micro-nutrient as important as silicon for optimizing plant health. Silicon plays an integral role in plant health by interacting with several key components of plant stress signaling systems leading to induced resistance. The terminology is confusing because there are differences between silicon, silica, silicic acid and silicate. Sometimes they’re used interchangeably by the fertilizer industry but these terms mean very different things. So, here are the definitions of some common terms involved when talking about silicon in plants.

Silicon: a tetravalent nonmetallic element that occurs combined as the most abundant element next to oxygen in the earth’s crust. It is an element with the symbol Si and atomic number 14. The elemental form itself is unassimilable to plants.

Silica: another name for silicon dioxide (SiO₂); found in the mineral quartz and also a major component of sand. Sometimes you will find products that contain micronized silicon dioxide to be amended in or there is even liquid silicon dioxide as well.

Silicates: compounds containing silicon-oxygen tetrahedrons (SiO4)4-that are used as fertilizers like calcium silicate, potassium silicate, sodium silicate and combinations of diatomaceous earth with minerals.

Silicic Acid: any of various weakly acid substances obtained as gelatinous masses by treating silicates with acids. It is a compound of silicon, oxygen, and hydrogen, regarded as the parent substance from which is derived a large family—the silicates—of minerals, salts, and esters. The only form of silicon which is available for entry or uptake into a plant is silicic acid, Si(OH)4

Monosilicic Acid (MSA): Synonym: orthosilicic acid (OSA). MSA or Si(OH)4 is the simplest form of soluble silicic acid. MSA is found universally in seawater, river water and soils at a concentration of a few ppm. Although MSA is in dynamic equilibrium with disilicic acid, it is considered the only bioavailable form of silicon.

What’s the Difference?

Because most of the silicon in the plant’s crust is held in forms plants cannot take up. These include silicon dioxide (silica) and various silicate minerals. While plants can’t take up silica, they can take up another form of silicon —monosilicic/orthosilicic acid. Bacteria can convert other silicon compounds into monosilicic acid. However, this process takes weeks or months. By the time silicon is in a plant available form, the plant might be too far along in it growth cycle for the silicon to be of much value. Therefore, growers often apply silicon in the form of monosilicic acid.


Potassium silicate (K2SiO3) is a salt of silicic acid (H4SiO4).

As mentioned above, silicates are not available to plants. So, plants cannot take up or use potassium silicate. First, bacteria must convert it to monosilicic acid.

Therefore, applying potassium silicate does not have the same effects as applying monosilicic acid. Depending on the level of nutrient cyclying and silica solubilizing bacteria present in the soil or on the leaf surface (foliar application), your plants will not be able to uptake potassium silicate for potentially weeks, it just depends on a variety of biotic and abiotic factors.

Role of Silicon in Plant Health

Silicon promotes plant growth by increasing the growth of cells which leads to faster growth of the roots stems and shoots. A few studies have shown that the application of silicon yields plants with taller and thicker stems. Silicon also helps protect plants from harmful fungi.

Eventually, silicic acid molecules polymerize into insoluble silica, which is deposited in plant tissues, first in the abaxial (lower) epidermis and then, as the plant grows, in the epidermis. It then condenses into particles of hard, polymerized silica gel, also known as phytoliths. It is this silica that imparts silicon’s benefits to plants by strengthening plant tissues and structures.

Primary Effects on Plant Growth

Mono-silicic acid has three primary effects on plants:

  1. Mechanical – Builds structure and resistance to stress
    Deposits silicon directly into the outer layer of the cell creating a rigid barrier and a more solid structure.
  2. Nutritional – Increased and more balanced uptake of nutrients
    Pressurizes the plant sap to allow a better and more even flow of nutrients throughout the plant circulatory system.
  3. Immunity – Stimulates plant’s immune system
    Triggers the production of immunity compounds, as well as drawing silicon to the point of attack to rebuild and strengthen tissue.

Improves Resistance to Fungal and Bacterial Pathogens

Although it’s not fully known how, silicon helps protect plants against harmful fungi. Some of these fungi include fusarium wilt and powdery mildew. Scientists think one way this element protects plants is by stimulating plant defenses. When you add silicon to your plants, they can better recognize diseases and begin to fight back LINK

Natural Sources of Silicon

So now that we know a little more about the element silicon and its role in plant health, let’s examine where we can find natural source of it.

  1. Diatomaceous earth Diatomaceous earth, also known as diatomite and DE, is the naturally occurring fossilized remains of diatoms—single-celled aquatic algae. It is a near-pure sedimentary deposit consisting almost entirely of silica.
  2. Horsetail The plant horsetail has found extensive application as a source of silica, The results for the silicon concentration in horsetail reached from 2.64% to 4.80% of the dry matter. The lowest amount of silicon was in the range between 1.52% and 2.51%.

Dr. Duke’s Phytochemical and Ethnobotanical Databases provide some reference points to the values of silica and silicon in the plant and shoot tissue of Horsetail – Equisetum arvense (Equisetaceae)

Horsetail Garden Tea

Here is a quick recipe from No Dig Garden for a horsetail extract to apply as a drench or foliar for your plants,

•2 cups fresh horsetail or 1 cup dried

•10 cups water

•Bring to the boil, reduce the heat and simmer for 30 minutes with the lid on. Leave to cool overnight – you may want to pop it outside as it isn’t the nicest of smells and can make the kitchen smell a bit peculiar, not quite what you need first thing in the morning!

•Strain through a sieve or colander lined with muslin and pour into labelled bottles. Store in a cool place for about a month. Pour any leftover potion into a compost heap.

•To use as a foliar spray or soil feed, dilute 1 part horsetail ‘tea’ to 4 parts water.

Here is a recipe for a smaller quantity which can be increased as you wish.

2 cups fresh horsetail or 1 cup dried

10 cups water

Bring to the boil, reduce the heat and simmer for 30 minutes with the lid on. Leave to cool overnight – you may want to pop it outside as it isn’t the nicest of smells and can make the kitchen smell a bit peculiar, not quite what you need first thing in the morning!

Strain through a sieve or colander lined with muslin and pour into labelled bottles. Store in a cool place for about a month. Pour any leftover potion into a compost heap.

To use as a foliar spray or soil feed, dilute 1 part horsetail ‘tea’ to 4 parts water.


In summation, Silicon has been shown to elicit these types of effects on plants

  1. Have stronger and thicker branches by depositing silicon directly into the outer layer of the cell.
  2. Carry sturdier and heavier fruits with higher nutritional value and a longer shelf-life.
  3. Silicon induced thermotolerance – Improves plants tolerance to heat extremes.
  4. Are more resistant to stress caused by high concentrations of salts in the substrate (high EC).
  5. Alleviates abiotic and biotic stresses, and increases the resistance of plants to pathogenic fungi.

Other Research Articles on Silicon

Role of Silicon on Plant–Pathogen Interactions

Silicon Influences Soil Availability and Accumulation of Mineral Nutrients in Various Plant Species

Silicon and plant disease resistance against pathogenic fungi

Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones

The Effects of Foliar Sprays with Different Silicon Compounds

Agriculture increases the bioavailability of silicon, a beneficial element for crop, in temperate soils


Featured are some of the custom genetics bred by the Cannabis Horticultural Association here in Humboldt County


The Cannabis Horticultural Association is pleased to announce a new perk to joining the CHA, Seeds!

All new members in the Silver, Gold, and Platinum tiers will receive an exclusive pack of non-feminized seeds from a specialty breeding project for 2021 that is selecting for a diverse array of terpenoids and concentrate production. A Slapz (Runtz x Grease Monkey) male plant was chosen and bred into a few select females of Gelonade, White Runtz, and Blood Orange Kush. Members can contact us directly for more info after signing up and to choose varieties and inquire if any new genetics are available. ***Seeds are for novelty use only and are collectors items.

White Runtz x Slapz showcased in gallery below

Green Member $9.99/year

  • Full Database Access

Sign up nowSilver Member $29/year

  • Full Database Access
  • 10 Seeds

Sign up nowGold Member $49/year

  • Full Database Access
  • Advanced Support
  • 15 Seeds

Sign up nowPlatinum Member $99/year

  • Full Database Access
  • Advanced Support
  • Customized Content Creation
  • 30 Seeds

USDA Publishes Final Rule for the Domestic Production of Hemp

Summary from Virginia Hemp Coalition:

Listed below is a summary of some of the changes from the IFR to the Final Rule that have been already identified: The Final Rule still insists that only DEA-certified laboratories test material, but it delays enforcement of this provision until 12/31/22.

The negligence standard has been increased from 0.5% THC to 1.0% THC, a helpful development to protect farmers’ economic interests.

The sampling window has been extended from 15 to 30 days of anticipated harvest, a welcome relief to help avoid bottlenecking in testing procedures.

Instead of rigid requirements for sampling being mandated from the federal level, the Final Rule establishes “performance-based” sampling requirements, giving states the flexibility to achieve performance objectives, such as a reliability of 95%.

The Final Rule continues to require pre-harvest samples to be taken from the flower material – not the whole plant as many requested — but it provides some relief by requiring the samples to be taken from 5 to 8 inches from the main stem, terminal bud, or central cola of the flowering top.

The USDA retains its requirement for testing total THC, instead of limiting the testing to Delta-9 THC as requested by some in the industry.

The more flexible disposal options that the USDA proposed last year – including on-farm or at-production disposal flexibility – have been made permanent.

Banker Plants – 2019 Research Project

Explosive Ember Peppers Intercropped with Cannabis
explosive ember pepper plants

In 2019, the Cannabis Horticultural Association (CHA) embarked on a small research project with Matthew Gates to investigate the use of explosive ember pepper plants in banker plant systems for cannabis. The link to the research information as well a tips on growing and purchasing the peppers is here: EXPLOSIVE EMBER PEPPER PLANTS

Cannabis Microbiome and the Role of Endophytes in Modulating the Production of Secondary Metabolites: An Overview

Meysam Taghinasab and Suha Jabaji *
Plant Science Department, Faculty of Agricultural and Environmental Sciences, MacDonald Campus of McGill University, QC H9X 3V9, Canada; Received: 13 January 2020; Accepted: 28 February 2020; Published: 2 March 2020

This is a very interesting article examines cannabis microbiota studies and the effects of endophytes on the elicitation of secondary metabolite production in cannabis plants. The review aims to shed light on the importance of the cannabis microbiome and how cannabinoid compound concentrations can be stimulated through symbiotic and/or mutualistic relationships with endophytes.

Pathogens and Molds Affecting Production and Quality of Cannabis sativa L.

Original Research ARTICLE Front. Plant Sci., 17 October 2019 |

This is a very interesting research article that covers the different pathogens affecting both the root and shoot growth of Cannabis sativa L. Inoculation experiments were conducted on developing buds and the roots of Cannabis sativa to determine the extent of disease development caused by pathogenic fungi. LINK BELOW

Have you had an experience with a pathogenic fungi or bacteria? Let us know about your experience in the comments below.

Shopping Cart
CHA NewsletterGet Connected with the Cannabis Horticultural Association

Subscribe to our newsletter below! Get access to the latest releases on seeds from CHA. See whats going on with newest entries into the membership database. Plus tips and tricks on horticultural practices!