January 2024 - 38

PGRs
also varies, with uniconazole as the longest duration
of control and daminozide the most transient. Keep in
mind the value of growth retardants like daminozide with
shorter periods of control - these can be very useful for
holding crops at the end of production without negatively
impacting their garden performance for consumers.
For many spring crops, we can also take advantage
of those growth retardants, including ancymidol,
flurprimidol, paclobutrazol and uniconazole, that are
taken up by roots. By drenching substrate with growth
retardants, longer-lasting growth control is possible. In
addition to drenches, root-active compounds can be used
for plug and liner dips. By placing a plug or liner tray into
a PGR solution ~1/2 to 2/3 the depth of the tray and
allowing it to sit for 30 seconds to two minutes, crops
can get treated with growth retardants prior to planting.
This is an efficient way to treat plants before they are
planted out and a much lower density in the greenhouse
for finishing. Additionally, liner dips are useful for treating
aggressive cultivars before planting when they are mixed
with less-vigorous crops in mixed containers together.
ETHEPHON
If you are looking for a PGR that can do several things,
look no further than ethephon (Collate, Florel, Pistil).
While it doesn't slice and dice, it suppresses growth,
promotes branching, aborts flowers and ripens fruits.
For spring crops, ethephon is most commonly used
for suppressing unwanted growth, like the anti-GA
If you are looking
for a PGR that can
do several things, look
no further than ethephon
(Collate, Florel, Pistil).
While it doesn't slice
and dice, it suppresses
growth, promotes
branching, aborts flowers
and ripens fruits.
38
JANUARY 2024 GPNMAG.COM
Photos courtesy of Christopher J. Currey.
compounds already discussed. It can also be used to
enhance branching on crops. This is especially useful
for getting containers to fill in more quickly, enhancing
quality and minimizing production time.
Ethephon is especially useful for those containers with
a long production time that you want to keep vegetative
early on, such as hanging baskets and mixed containers.
Premature flowering is not desirable when you are bulking
up the plants and spent flowers become a magnet for
pathogens. But instead of pinching or shearing or handpicking,
ethephon sprays help knock off buds and flowers
and keep crops vegetative. Early ethephon applications
New Guinea impatens
IBA spray (ppm)
75
150
300
450
5
10
20
40
Flurprimidol
Paclobutrazol
Uniconazole
2.5
5
10
20
Un-pinched control
300 ppm BA

http://www.GPNMAG.COM

January 2024

Table of Contents for the Digital Edition of January 2024

Table of Contents
Editor's Report | Guess Who's Back?!
AmericanHort | Resolve to Drive Your Business Forward in 2024
Forty Under 40 Perspectives | Invest in the Community
Dr. Bugs | Can Plants Influence Susceptibility to Insecticides?
SGAFT | Energy Curtain Performance
Varieties | Winners' Circle
Technology | Shaping the Future
Intern of the Year | Ian Kelly
PGRs | Annuals and Perennials — Part 2
Big Grower | North Creek Nurseries
Big Grower | Product Showcase
Culture Report | Centaurea 'Silver Swirl'
Research | Thrips & Botrytis Online Resource Library
Product Marketplace
Classifieds/Ad Index
January 2024 - 1
January 2024 - 2
January 2024 - Table of Contents
January 2024 - Editor's Report | Guess Who's Back?!
January 2024 - 5
January 2024 - AmericanHort | Resolve to Drive Your Business Forward in 2024
January 2024 - 7
January 2024 - Forty Under 40 Perspectives | Invest in the Community
January 2024 - 9
January 2024 - 10
January 2024 - 11
January 2024 - Dr. Bugs | Can Plants Influence Susceptibility to Insecticides?
January 2024 - 13
January 2024 - 14
January 2024 - 15
January 2024 - SGAFT | Energy Curtain Performance
January 2024 - 17
January 2024 - 18
January 2024 - 19
January 2024 - Varieties | Winners' Circle
January 2024 - 21
January 2024 - 22
January 2024 - 23
January 2024 - 24
January 2024 - 25
January 2024 - Technology | Shaping the Future
January 2024 - 27
January 2024 - 28
January 2024 - 29
January 2024 - 30
January 2024 - 31
January 2024 - 32
January 2024 - 33
January 2024 - Intern of the Year | Ian Kelly
January 2024 - 35
January 2024 - PGRs | Annuals and Perennials — Part 2
January 2024 - 37
January 2024 - 38
January 2024 - 39
January 2024 - 40
January 2024 - 41
January 2024 - Big Grower | North Creek Nurseries
January 2024 - 43
January 2024 - 44
January 2024 - 45
January 2024 - 46
January 2024 - Big Grower | Product Showcase
January 2024 - Culture Report | Centaurea 'Silver Swirl'
January 2024 - 49
January 2024 - 50
January 2024 - 51
January 2024 - 52
January 2024 - 53
January 2024 - Research | Thrips & Botrytis Online Resource Library
January 2024 - 55
January 2024 - 56
January 2024 - 57
January 2024 - Product Marketplace
January 2024 - 59
January 2024 - 60
January 2024 - 61
January 2024 - 62
January 2024 - 63
January 2024 - 64
January 2024 - 65
January 2024 - Classifieds/Ad Index
January 2024 - 67
January 2024 - 68
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https://www.nxtbook.com/greatamericanmediaservices/GPN/2024-guide-to-cannabis-production
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-december-2023
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https://www.nxtbook.com/greatamericanmediaservices/GPN/new-varieties-digital-guide-2024
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2023
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https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-april-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/2023-guide-to-hemp-production
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/2023-guide-to-cannabis-production
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-december-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-october-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/october-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/gpn-new-varieties-digital-guide-2023
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-april-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/newvarieties-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/december-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-november-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/october-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-september-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/newvarieties-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/december-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-november-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/october-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-september-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/californiaspringtrials-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/december-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-november-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/october-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-september-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/californiaspringtrials-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/undercontrol-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2019
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2019
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