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Vol. 12, No. 4 | Nov 2025
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Written By: James Johnson
Edited by: Robert Brown
Reviewed by: William Garcia

Best Organic Seed Producers Directory Search by State

This is the Organic Seed Producers & Intern Host Farm Directory. The goal of this directory is to facilitate connections between seed companies and wholesale seed buyers with organic seed producers, as well as seed growers and prospective seed farm interns. There are several ways this directory can be utilized. For general questions about the directory and how it works, please direct them to Jared Zystro.

Organic seed producers can Make a Profile and enter information about themselves, their farms, and their seeds. Profiles can be personalized to represent the range of your farm operation and how you prefer to be contacted. There are options for direct seed sales, new seed contracts, or offering seed internships for beginner seed producers.

Seed companies and/or wholesale seed buyers searching for organic seed producers can use this page to identify seed producers by location, capacity, crop, etc.

If you seek a seed production internship, you can use the filter for host farms and contact farms directly to ask about existing internships. Organic Seed Alliance does not supply seed interns to host farms, but rather provides the resources for both parties to connect. If you have further questions or need more information about becoming an intern host farm, please contact us.

Table 1: Growth Metric Comparison

Parameter Soil Cultivation Hydroponic System Variance (%)
Avg. Vegetative Time 4-6 weeks 3-5 weeks -16.7
Avg. Yield per Plant 85-120g 110-160g +29.4
Nutrient Management Buffered, gradual Precise, immediate N/A
Root Health Index 7.2/10 8.5/10 +18.1
Water Efficiency Standard +40-70% +55.0
Disease Resistance Moderate High (controlled) N/A

Photography

Figure 1.1: Longitudinal cross-section of mature cannabis stem showing vascular tissue distribution and cellular structure under laboratory conditions
Figure 1.1
Figure 1.2: Comparative morphological analysis of root system development in aeroponic versus traditional substrate cultivation methods
Figure 1.2
Figure 1.3: Microscopic observation of trichome density and capitate-stalked glandular development during peak flowering stage
Figure 1.3
Figure 1.4: Phenotypic expression comparison between indica-dominant and sativa-dominant cultivars at vegetative maturity
Figure 1.4
Figure 1.5: Detailed botanical illustration of pistil coloration progression and calyx swelling during reproductive phase development
Figure 1.5

Diagram A: Optimal Environmental Parameters

Temperature Range
20-28°C (68-82°F)
Relative Humidity
Veg: 55-70% | Flower: 40-50%
Substrate pH
Soil: 6.0-7.0 | Hydro: 5.5-6.5
Light Intensity (PPFD)
Veg: 300-600 μmol/m²/s | Flower: 600-1000 μmol/m²/s

Note: Parameters represent optimal ranges for photoperiod-dependent cannabis cultivars under controlled environment agriculture (CEA) conditions. Individual cultivar requirements may vary.