Cannabis Guide - 2022 - 10

LIGHTING
they are growing, as this will determine their success from a
crop scheduling perspective. They will need to know when to
plant based on when day lengths are long enough to keep the
plant vegetative in the spring but also soon enough so they
can take advantage of the natural long days throughout the
summer to build vegetative growth on the plant. They will then
need to understand at what photoperiod their crop will initiate
flowering and schedule their state testing based on this along
with their harvest schedule.
There are some cultivators in more southern regions in the
Greenhouse growers should be aware of their natural day length and the total
light penetrating their greenhouse. Photos: Travis Higginbotham.
OUTDOOR PRODUCTION
Cultivation of cannabis outdoors is currently dominated by
field hemp production. There are cultivators growing THC
crops outdoors in certain states, but the area taken up with
hemp far exceeds that of THC field crops. With this said, most
hemp cultivators have one cycle per year. There may be a few
farmers out there pushing the limits of this with auto-flower
genetics or short-day crops in specific regions but for the most
part, most cannabis production outdoors has one crop per year.
For this style of production, cultivators need to have a strong
understanding of the photoperiodic response of the genetics
U.S. who are using spotlights or string lights outdoors to keep
their crops vegetative. This works but is challenging at scale and
is used when the day lengths are not long enough to bulk a crop
adequately before flowering. Spring and fall frosts in parallel
to a field cultivator's day length need to be considered because
in specific latitudes a cultivator may have a long enough day to
plant but could risk their whole crop dying from a late spring
frost even though they did their due diligence at planting as
soon as possible without premature flower.
Keep in mind that in all three of these production systems,
light is tied to all other influencing factors to plant growth. As
a simple example, if you were to push high light levels indoors
or in a greenhouse, if you don't have the proper CO2
levels
nor VPD (vapor pressure deficit) control, or nutrition regime/
delivery - the lighting can only do so much for you. v
Travis Higginbotham is vice president of production at
Harborside, Inc. He can be reached at travis.h@hborgroup.com.
WHITE GROUND
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3
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GROGRO
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Flexible Planter Bag
Flexible Planter Bag2
2
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4
DeWitt White Ground Cover
DeWitt White Ground Cover is a 3.2 oz UV-stabilized
white woven polypropylene fabric that is permeable,
allowing water and nutrients to pass through. White
Ground Cover provides light reflection to the plant
which supports the growing process.
DeWitt GRO - POTS
GRO - POTS are compatible with drip or overhead irrigation and
hydroponic flood trays. The ventilated design allows drainage
and creates a healthy root system . A durable, flexible fabric
planter bag for indoor and outdoor applications. Made of 100%
coated polypropylene and UV protected . 10 sizes available.
DeWitt Sunbelt®
DeWitt's Sunbelt®
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consists of 3.2 oz. polypropylene,
which resists tearing, puncturing and weed penetration.
Ideal for greenhouses, outdoor displays and as a
weed barrier for plantings without topical coverings.
Striped every 12 " to aid in plant alignment.
SUNBELT
WOVEN GROUND COVER
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Cannabis Guide - 2022

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