The Hemp Farmer’s Calendar: A Guide To Seeding, Testing, And Harvesting

Hemp is simultaneously one of the newest (and oldest) crops that grow in the United States. Moreover, it has historically been one of the most significant crops for humankind across the globe. We are now seeing a dramatic renaissance, rediscovery, and resurgence in cultivating this amazing plant for its fiber, seeds, and CBD (cannabidiol) content.

Many farmers – or aspiring farmers – just like yourself are now interested in growing hemp. However, that may be easier as a concept than it is to execute successfully. If you’re interested in breaking into the hemp industry, it is critical that you properly and thoroughly plan before putting seeds into the ground.

One of the first things a grower needs to determine is when to plant. Regions across the United States have significantly different growing conditions, so a one-size-fits-all approach will not work.


To help you plan, execute and track planting activities and growth progress, we designed the Hemp Farmer’s Calendar to assist you in achieving optimal growth and an abundantly successful harvest.

The Hemp Farmers’ Calendar supports hemp growers not just by telling you when to plant your seeds, but also by supplying reminders and general information on the best time to test your soil, prepare the seedbed, order tests for THC monitoring, and schedule regulatory inspection and analysis – all before your anticipated harvest date.


The Hemp Farmer’s Calendar is customized for the Northeast, Midwest, South, and West regions of the United States. These areas have distinctly different climates, so make sure that you choose the correct region for where you are growing your hemp. 

Also please note that for each state within each region there are different state-specific regulations and compliance monitoring. Make sure you check the information for your state.

Ultimately, you need to avoid planting the crop too early in the year, resulting in the plants dying due to the soil and air being too cold. Also, you need to avoid planting the plants too late to ensure that the plants have enough time to go through the full growth cycle. 


You can sync the 2021 Hemp Farmer’s Calendar to your existing calendar. It will help you determine a schedule for:

Soil Testing

Hemp grows best in loose, deep soils rich in organic matter, fertile loams, and a pH from 6.0 to 7.5. Testing the soil 3 months before planting allows you enough time to remediate the soil before planting. 


Knowing the desired end-use for your hemp plants is key to choosing the right hemp seed variety to cultivate. 

Check for frost potential and day length before planting. Some hemp varieties germinate at temperatures as low as 35°F, but germination is quicker and more dependable when the soil is around 50°F. Keep in mind that if hemp seeds are planted when days have less than approximately 14 hours of sunlight, hemp may begin to flower before the plants have had a chance to undergo any vegetative growth. Similarly, if growers plant too late, plants may flower prematurely.

THC Testing

Regular testing for THC potency levels during flowering is a critical step. This allows growers to know when to harvest their crops. If THC levels begin to approach the legal threshold during flowering maturation, a simple THC potency test will help growers know when to harvest their crop before it gets hot (>0.3% THC).


This calendar has been specifically designed as a reference tool for established or aspiring hemp farmers. It can be seen at a glance via printable PDF or can be automated via Google Calendar. Once you sign-up for the Hemp Farmer’s Calendar, you will be prompted to accept the calendar events according to your region.

Make sure you revisit it often to maximize your growth potential. If you ever have any questions, we are here for you. Don’t ever hesitate to reach out to We’d love to hear from you!

Start syncing the Hemp Farmer’s Calendar today. We wish you a bountiful hemp-growing season!

Note: This calendar is a guide and is not a guarantee for a successful harvest. It is up to you to make the best of your growing season. If you have questions about sustainable hemp cultivation or efficient testing, our support team is standing by.