harvesting hemp for cbd

Harvesting hemp for cbd

It is difficult to estimate the square footage of drying space needed per plant. Using a flu-cured tobacco with 800 square feet a grower was able to dry 1 acre worth of plants (approximately 1350 plants) in 3 days. Another grower was able to dry approximately 1.5 acres worth of hemp (plant number not stated) in a 2500 square foot barn.

Hemp biomass made from chipping the entire hemp plant. This biomass is low quality and will receive a reduced price. Photo by George Place

Hanging entire plants upside down on wires in the drying barn is a common practice. Unfortunately, as those plants dry the branches droop down in the formation of a closing umbrella. That closing umbrella shape results in less airflow to the center of that entire hemp plant. Thus more mold and mildew will grow in that center portion. We advise growers to break off the individual branches from the hemp plant and hang branches on the drying wire, not whole plants. This step is more labor intensive but will help minimize mold and mildew.

Weekly testing of CBD content can inform the grower of when harvest should be initiated. This is in addition to the required THC test with the North Carolina Department of Agriculture. While some of the tests for CBD, cannabinoids, terpenes, pesticide residue, mold, and heavy metals can cost as much as $300 the return on investment can be significant. For example, if 1000 lbs of biomass will be harvested on one acre the difference between harvesting when the crop is at 6% CBD versus when the crop is at 7%CBD is equivalent to 10 pounds of CBD oil. Current prices for CBD oil are $5 per gram. With 454 grams per pound, a 1% discrepancy in CBD content on one acre can be a $20,000 crop value difference. Growers need to test frequently to make the right decision regarding harvest timing.

Drying and Curing Hemp

Weather will also be a key factor in determining when to pull the harvest trigger. Harvest time for hemp coincides with the hurricane season. Growers will have an easier time drying and curing their hemp floral biomass if they can bring it in before the arrival of a storm. This is the time when adequate labor is crucial. The vast majority of hemp growers for the CBD market are relying on labor to cut the stalk (the machete is the current tool of choice) and load the biomass. This takes a lot of time and physical exertion. I have heard reports of growers that had an excellent crop of hemp floral biomass but suffered massive losses because they could not harvest it in time (their two-person harvest team was not adequate). The importance of measuring the labor requirement is a big reason why we recommend that first-year hemp growers for the CBD market start with 1 acre or less. Growers need to keep track of the amount of man and woman hours that it takes to bring in the harvest. Maintaining sharp tools during the harvest process will also save time and effort.

Once hemp is harvested growers should immediately move the floral biomass to the drying facility. This could be a simple structure like a barn. The facility should be under roof, out of direct sunlight, and well ventilated. Growers need to set up several fans and have them blowing continuously. Significant ventilation is crucial! Ideal temperatures for drying and curing are 60 to 70 degrees F at 60% humidity. Some processors say that hemp growers should not dry their floral biomass at the same temperatures as flu-cured tobacco. Those temps are too high and dry the hemp too quickly. A slow drying with high airflow will cure the hemp, produce a higher quality end product (better cannabinoid and terpene spectrum), and fetch a higher price.

CBD oil extraction process. Photo by George Place

There is a lot of interest in growing industrial hemp for CBD production, especially since hemp was legalized in the 2018 Farm Bill. Take a look at some of my previous articles regarding the potential risks and rewards in the CBD market as well as agronomic considerations for successful industrial hemp production.

Harvesting hemp is a critical stage for CBD production. The presence of molds and mildews will lower the value of hemp floral biomass so a timely harvest is essential. There are visual clues on the hemp bud that growers should monitor. When trichomes on the hemp bud shift from white to milky white it may be time to harvest.

Harvesting hemp for cbd

Quickly load a follow trailer or truck for rapid harvesting with minimal labor. With a total working width of approximately 12 feet, the CBD hemp harvester can be matched to most tractors and trailers.

The KIRPY CBD Hemp Harvester is an automatic, whole plant harvester for cutting, notching, and loading entire plants. Capable of processing up to 5 acres per day, the KIRPY Hemp Harvester makes quick work of large-scale hemp crops.

Harvest CBD hemp with a stalk diameter of up to 2.5″ and a height of up to 5′. Designed to for commercially grown CBD hemp flowers.

AUTO LOADING

After rigorously testing the original KIRPY tobacco harvester on hemp, the machine was re-engineered and strengthened to meet the unique demands of the hemp plant. The result is the KIRPY CBD hemp harvester, designed and built from the ground up for fast, worry-free hemp harvests.

Process up to 5 acres of CBD hemp or cannabis in a single day while keeping the plants off the ground and structurally pristine.

Designed for tractors with a PTO drive and 40 HP, the CBD hemp harvester can be raised and lowered to adapt to field and crop conditions. The CBD hemp harvester can handle flat and sloping terrain.

Rapid Harvests