July 2022 - 34

PRODUCTION
of unique requirements and limitations, such as which crops
you can safely use them on. This can add to the challenge of
determining the best product to use for your operation.
TIMING
Determining the appropriate time to apply a PGR can be tricky.
It's important to know the typical development of your crop so
you can time the application appropriately. This will help you
avoid too early of an application, which may shut down plant
growth, or too late of an application that results in leggy plants.
Optimal timing is just before plants rapidly grow.
If you wait too long, you may need additional product or miss
the window for the product to be effective. PGRs reduce the
growth rate of plants; they cannot reduce the plant size once they
have grown too large.
PGRs can be applied early in the growth stage of plants or prior
to shipping to help plants hold their shape at retail.
During the later stages of production, PGRs can also be
drenched several times at lower concentrations. These " toning "
drenches are typically one half to one quarter the concentration
of the holding drench and should be applied when growers want
to manage growth week by week, rather than one strong dose to
hold the crop. A toning drench is just enough to slow growth and
cause slightly darker foliage.
It's important to not only study your crops' growth timeline but
also to read the PGR label to know if it's the right choice for your
operation and crop.
RELIABLE
VENTILATION EQUIPMENT
Family-Owned
Since 1937
Quietaire's Angle Flow:
Aluminum or Galvanized.
Designed to maximize
efficiency.
Quietaire's Stainless Steel Evaporative
Cooling System:
No sump required.
Replacement
cooling pads
also available.
Quietaire's HAF18: Affordable option
to move air through your greenhouse.
Serving the greenhouse
industry for over 75
years with prompt
service and durable,
low maintenance and
quality ventilation products.
TROPICALS
SUCCULENTS
CELL PACK LINERS
NEW VARIETIES
1 TRAY MINIMUM
PRODUCED IN THE USA
www.quietaire.com
info@quietaire.com
866-228-9421 Fax 713-228-9425
505 North Hutcheson Houston, TX 77003
34 JULY 2022 GPNMAG.COM
CONTACT US FOR MORE INFORMATION
AND REQUEST A CATALOG
(407) 889-8487 * Info@ag2tc.com
www.ag2tc.com
TISSUE CULTURE LINERS
4341 Round Lake Road Apopka, FL 32712
FERNS
FOLIAGE
ADDITIONAL APPLICATION TIPS
PGRs should only be applied to plants that are not under stress.
LANDSCAPE
Be sure to evaluate root conditions prior to application. The root
system should be healthy with active roots for proper absorption.
It is important to water plants the day before application, so
drench applications are absorbed evenly, and spray applications
are not rinsed off with additional irrigation. Additionally, the
growing medium should be moist before application, and moisture
levels should be similar from pot to pot within the crop block.
Uniform application is also critical for achieving consistent
results. The amount of active ingredient per pot is based on the
concentration (ppm) and the final volume of solution applied. If
more solution is applied to some pots but not others, the result
will be stronger growth regulation in those pots receiving more of
the active ingredient, even if the concentration in the solution is
the same.
SHOULD ALL PLANTS RECEIVE THE SAME RATE?
It can be difficult to balance the different factors that affect the
PGR application rate, such as growing location, plant species and
age. Plant vigor can differ significantly between the region and
climate zone of your operation. Crops grown in moderate-to-warm
climates typically require lower rates than those grown in hot and
humid climates. There can also be significant differences in plant
vigor within a species. The taller, more vigorous varieties typically
require a higher rate than the naturally short, less vigorous
varieties. Lastly, younger, smaller plants of the same species will
respond differently than older, larger plants even though volume
and pot size may remain the same.
It is best to treat a small subset of a specific crop before
treating the entire plot. Adjust the rate of your PGR to achieve the
desired height and length of control.
Quick Lead Time!
http://www.quietaire.com http://www.ag2tc.com http://www.GPNMAG.COM
July 2022

Table of Contents for the Digital Edition of July 2022
