BlackTree Farms logo BlackTree Farms
Hemp field at sunset

How to Grow Hemp in Oklahoma (2025 Step-by-Step Guide)

Want to grow hemp in Oklahoma? Here's a complete guide to help you get licensed, stay compliant, and start growing successfully — from scratch.

1. Are You Eligible?

Before you start your application, make sure you meet these basic requirements:

  • You must be 18 years or older
  • You must not have a felony drug conviction in the past 10 years

Link to application

2. Gather These Documents

You'll need the following to apply:

  • Proof of land ownership OR a signed lease agreement
  • Criminal history report for each key participant (dated within 60 days)
  • Map of your grow area with GPS coordinates

Map Instructions

You can use this guide to creating hemp application maps.

How to create your Hemp Application Map and GPS coordinates

Outdoor Growers:

  • Total acreage
  • Legal description (township, range, GPS)

Indoor Growers:

  • Total square footage
  • Full address with GPS coordinates

3. Calculate Your Grow Area

Indoor (Square Footage):

  1. Measure length × width in feet
  2. Example: 50 × 20 = 1,000 sq. ft

Outdoor (Acreage):

  1. Multiply length × width
  2. Divide by 43,560 (sq. ft in one acre)
  3. Example: 600 × 400 = 240,000 ÷ 43,560 = 5.51 acres

Use Google Maps to help

Using Google Maps to Calculate Acreage

  1. Open Google Maps: https://www.google.com/maps
  2. Find Your Location: Enter your field’s address and zoom into the grow area.
  3. Activate the Measurement Tool:
    • On a computer: Right-click and select “Measure distance.”
    • On mobile: Press and hold on the starting point, tap the menu icon, and choose “Measure distance.”
  4. Outline Your Field: Click or tap along the field’s edges to create a polygon.
  5. View the Area: Once the shape is complete, Google Maps will display the total area.
  6. Convert the Units to Acres:
    • Square Meters × 0.000247 = Acres
    • Square Feet ÷ 43,560 = Acres

Using Apple Maps to Calculate Acreage

Using Apple Maps to Calculate Acreage

Apple Maps doesn’t include acreage tools, but you can use free apps like:

  • Map Area Calculator – Marea
  • GPS Area Measure – FieldCalc
Steps:
  1. Download and open the app.
  2. Find Your Location: Use Apple Maps to navigate to your grow area.
  3. Outline Your Field: Use the app’s drawing tool to trace your field’s boundaries.
  4. View the Area Measurement: The app will display your field’s area in square meters, square feet, or acres.

4. Submitting the Application

Once you’ve gathered all your documents, you’re ready to submit your application to the Oklahoma Department of Agriculture, Food and Forestry (ODAFF).

You have a few options:

Email:

Send your completed application and all documents to:
hemp@ag.ok.gov

Mail:

Oklahoma Department of Agriculture, Food and Forestry
2800 N. Lincoln Blvd.
Oklahoma City, OK 73105
Recommended: Use USPS Signature Required for tracking

Hand Delivery:

Drop it off at the same address above.
This often results in faster processing times.

Before you send, make sure:

  • All forms are complete
  • Maps and GPS data are included
  • Criminal history reports are dated within 60 days

Download the 2025 Application Form

5. Sourcing Clones (Start Strong)

Start your grow with healthy, high-performing genetics — it makes a huge difference in your success.

At BlackTree Farms, we offer:

  • ✅ CBD and CBG clones from proven genetics
  • ✅ COAs and compliance paperwork included with every order
  • ✅ Support from real growers who’ve done this before

We’re based in Oklahoma and understand the local environment, compliance process, and market.

Browse Clones

6. Compliance Tips

Stay compliant throughout your grow season — inspections and testing are part of the process.

  • Be ready for site inspections at any time by ODAFF.
  • Submit a Pre-Harvest Inspection Request Form at least 30 days before harvesting.
  • THC levels must be below 0.3% (measured after decarboxylation).
  • Keep detailed records — planting dates, test results, clone certificates (COAs), and more.

Download the form here

✅ Tip: Start small if it’s your first grow — it helps with record-keeping and compliance.

7. Register Your Farm with FSA

Before you grow, you’ll need to register your land with the USDA Farm Service Agency (FSA) — this is required to access any federal programs.

Find your local USDA office:

USDA Service Center Locator

Bring key documents like:

  • Property deed or lease
  • Personal or business tax ID

After registration, you’ll receive a Farm Number — you’ll need this for federal support programs and crop reporting.

📌 FSA registration is free — and it’s a one-time step unless you change land.

Tips for First-Time Growers

  • Stay compliant — ODAFF can inspect your site at any time
  • Keep detailed records (planting dates, COAs, THC tests, etc.)
  • Monitor THC levels (must stay under 0.3%)
  • Start small if it’s your first season

Need help getting started? Reach out — we’ve helped dozens of Oklahoma growers go from license to harvest.