A sensible approach for commercial and home growers alike that boosts quality and resilience in cannabis cultivation. For help implementing this approach, sign up for our 1-on-1 growing guidance program
Mediocre flower no longer flys off the shelves for $3500 a pound. To stay competitive, you need to be cost-conscious while producing top-tier quality. On top of that, buyers are constantly looking for new and unique flavors.
With thinning margins, mistakes like losing crops to pests and disease are harder to recover from. The good news? The synganic approach can help improve quality and strengthen your plants defenses against pests and disease.
Current Landscape: Sterile vs Living Soil Growers
For years, growers have relied on biologicals to defend against pests and pathogens while promoting plant health—using tools like Bacillus spp., Beauveria bassiana, SF nematodes, and mycorrhizae. In controlled environments, we do our best to keep harmful nature out while encouraging the good nature to come in.
There has however been a significant trend towards sterile growing. It’s clean, straightforward, and helps avoid microbial testing failures. This method often delivers high THC percentages and strong yields, with good terpenes at first—but the pungency and aroma tend to fade a bit more quickly.
On the other side of the spectrum are the living soil growers, the dreamers, the raised bed farmers spraying who knows what bubbling concoction teaming with microscopic life. In many ways more sustainable but elusive on how best to do it on a commercial scale with consistent results. It does however produce undeniably some of the tastiest flower.
Whats is the Synganic Approach?
The Synganic Approach – This method blends a salt-based fertigation program with organic amendments and foliar applications. It offers the best of both worlds—yield and consistency from mineral nutrients, with enhanced flavor and resilience from organic inputs.
Key Considerations
- Substrate Matters: Most inert growing media (like rockwool and coarse coco blends) struggle to retain biological life in the root zone.
- Workaround: You can still gain benefits through foliar applications, but for full synergy, choose a substrate that holds water and nutrients longer to support microbial activity.
Below are some common challenges and ways to solve them using the synganic approach.
Challenge #1 – Managing Strains with Different Nutritional Needs
- In a complex operation, custom nutrient recipes for every strain isn’t feasible. Most growers simply remove strains that don’t fit the program.
- However, foliar sprays and organic amendments can deepen the pool of available nutrients, allowing plants to access what they need when they need it.
- This approach helps even the most finicky strains thrive by providing tailored nutrition without overcomplicating the feeding program.
Challenge #2 – Strengthening Natural Defenses Against Powdery Mildew & Botrytis
- For disease to take hold, three factors must align: a susceptible plant, a favorable environment, and the presence of a pathogen (the “disease triangle”).
- Despite best efforts, equipment failures or imperfect biosecurity can create a conducive environment.
- Strengthening plant defenses—such as strong cell walls and a robust lipid layer on the leaf—makes them more resilient.
- Organic amendments, beneficial microbes, and foliar applications of Silicic Acid, Calcium, and Kelp all contribute to stronger plant structures.
Challenge #3 – Reducing Attractiveness to Sap-Sucking Pests
- Just as with disease prevention, the goal is to make plants less appealing to pests like aphids, thrips, and spider mites.
- Research shows that nutrient composition impacts plant attractiveness to pests.
- Excess NO₃⁻ (nitrate-based nitrogen), common in salt-based blends, promotes soft, lush growth, which pests love.
- Diverse organic amendments with key micronutrients help convert NO₃⁻ to NH₄⁺ within the plant, making plants less appealing to sap-suckers (see the “A Bit More Science for the Curious” section for details).
- Additionally, a weak cuticle or lipid layer on leaves makes penetration easier for pests—another reason to reinforce plant structure with proper nutrition.
The Disease Triangle
Solutions:
Foliar Applications (Weekly Rotation Until Week 4 of Flower):
- Kelp Extract, Silicic Acid, and Calcium Chloride Dihydrate: These promote a thick lipid layer on the leaves and strengthen cell walls. Be sure to keep readily available Calcium in late flower even if you are “flushing” to keep cell walls strong.
Microbial Boosters: (Apply once every 2-4 weeks)
- Mycorrhizae, Trichoderma Fungi, other Beneficial Bacteria: Mycorrhizae act as an extension of the root system, improving nutrient uptake, while Trichoderma and Beneficials enhance the microbial population that outcompete soil-born pathogens like fusarium.
Organic Amendments:
- Humic and Fulvic Acid, Seaweed Extract and Amino Acids: Supports microbial life and provides hormones like cytokinins and auxins that promote stress resistance and improve nutrient absorption and soil health.
Monitoring:
- Regular SAP Analysis/Tissue Testing: Use SAP analysis in conjunction with crop registration (data collection) to monitor nutrient uptake to make tailored adjustments and develop your own in-house protocol.
Nitrogen Conversion:
- Evaluate and promote the nitrate reductase process: (the conversion of NO₃⁻ to NH₄⁺) This aids in amino acid and complex carbohydrate production which in turn makes plants less appealing to sap-sucking insects.
**Be sure to buy organic supplements from reputable sources to avoid heavy metals and contaminants.
A Bit More Science for the Curious
- Nitrate Reduction & Enzyme Activity: Molybdenum is an essential cofactor for nitrate reductase, the enzyme that converts nitrate (NO₃⁻) to nitrite (NO₂⁻) and ultimately to ammonium (NH₄⁺). This conversion allows plants to incorporate carbon skeletons (produced through photosynthesis) to form amino acids. The resulting synthesis of complex carbohydrates and proteins strengthens cell walls and the leaf cuticle.
- Sulfur Assimilation & Plant Defense: Adequate sulfur—taken up and converted into amino acids like cysteine—is critical for producing defense compounds and reinforcing structural components. When plants have a balanced supply of nitrogen and sulfur, they develop robust amino acid profiles and complex carbohydrates, making their tissues less attractive to sap-sucking insects. However, excessive nitrate can antagonize sulfur uptake. Some studies suggest that maintaining an S:N ratio near 1:10 (by weight) is beneficial for combating powdery mildew and ensuring proper sulfur assimilation. (Marschner, 2012)
Key Takeaway
- A multi-pronged approach is important.
- By increasing the biological life, we in turn increase the amazing smells and flavors which we all love. These compounds, while critical to quality flower, exist to be defense compounds and thus benefit the plant as well.
Does this all make your nutrient regimen slightly more challenging? Sure, but if it was easy, everyone would do it. Elevate your thinking and rise above the rest.
About the Author
Matt, Co-Founder of Triangle Hemp – Matt has been growing plants commercially since 2013, starting with Endless Sun Farms before co-founding Triangle Hemp in 2017 alongside childhood friend Chase. Over more than a decade, Triangle Hemp has produced and sold over a million seeds to home growers, homesteaders, and hemp farmers across the United States. Matt and Chase manage seed selection person
