Impact of Indole-3-butyric Acid Concentration and Formulation and Propagation Environment on Rooting Success of ‘I3’ Hemp by Stem Cuttings

As the industrial hemp ( Cannabis sativa L.) market grows, there is a need for methods to clonally propagate parental breeding stock and new cultivars. Information is lacking on vegetative cutting propagation of hemp. We evaluated how propagation environment (intermittent mist vs. subirrigation unde...

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Bibliographic Details
Published in:HortTechnology (Alexandria, Va.) Va.), 2022-06, Vol.32 (3), p.321-324
Main Authors: McLeod, Adigun, Vining, Kelly, Hoskins, Tyler, Contreras, Ryan
Format: Article
Language:English
Subjects:
cannabis sativa
clonal propagation
humidity
iba
intermittent mist
quick dip iba
talc
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Summary:As the industrial hemp ( Cannabis sativa L.) market grows, there is a need for methods to clonally propagate parental breeding stock and new cultivars. Information is lacking on vegetative cutting propagation of hemp. We evaluated how propagation environment (intermittent mist vs. subirrigation under a humidity dome), indole-3-butyric acid (IBA) formulation (talc rooting powder vs. IBA in solution), and IBA concentration (0, 3000, or 8000 ppm) affected stem cuttings from ‘I3’, a cannabinoid-free cultivar of industrial hemp. Under mist or domes, rooting quality and percent declined at 8000 ppm IBA. Root and shoot quality and rooting percentage also were reduced in 3000 ppm IBA in solution treatment compared with talc. Our data show that for the cultivar tested, cuttings rooted at the highest percentage and produced the highest-quality roots and shoots with either no hormone or 3000 ppm talc powder. These treatments did equally well under humidity domes or intermittent mist.
ISSN:1063-0198
1943-7714
DOI:10.21273/HORTTECH05016-21