June 2024 - 36

CULTURE REPORT
FLOWER INITIATION AND DEVELOPMENT
The first stage of flowering begins 5-7 days after
the critical day length is reached (12 hours). Flower
development is the time from flower initiation to pollen
shed. This period is 7-8 weeks.
Plants color early with a long peak and hold late.
Natural season is mid- to late November, depending on the
location. Lighting is required for late crops through night
interruption or day length extension.
PINCHING
The timing of pinching depends on several factors
including:
1. Desired number of nodes on the stem
2. Scheduled start date of short days
3. Root establishment.
For the desired number of flower heads on the finished
plant, in general:
* 4-inch crop, leave 4-5 nodes
* 6-inch crop, leave 5-8 nodes below the pinch
* The number of nodes above 8 will not be viable, as
a large amount of space will be required between
the plants.
Princettia is very free branching. Plants tend to over
branch. More branches mean smaller overall bract size.
Keep in mind, this is a different look. The number of
bracts desired plus one is plenty.
GROWING TEMPERATURES
For establishment of the crop after propagation, the day
temperature should be 75° F-80° F and night temperature
of 56° F-65° F. For the final finishing, day temperature of 70°
F-75° F is best, with night temperature between 65° F-78° F.
MANAGING GROWTH
Except for the Princettia Queen series, all Princettia
varieties are naturally compact and mounding. Maintain
adequate space to achieve this form. Minimal to no PGRs
are required but are recommended in small doses to help
even the growth. Growers can use Cycocel after pinching
to even things up. Northern growers have found success
with Cycocel at rates of 750-1,250 ppm.
PESTS AND DISEASES
Monitor and control pests and diseases typical for
poinsettia production. Fungus gnat control is critical in
the beginning. Water management plays a role. Princettia
has a stronger root system, but constant inspection is
recommended. Apply fungicides as needed. Botrytis can
be a risk near or at harvest, especially on very ripe plants
postharvest.
36
JUNE 2024 GPNMAG.COM
Queen Shell Pink
SECRETS OF SUCCESS
Pay attention to water, fertility and temperatures.
Princettia is a more compact, low-vigor plant. Plants will
use less water than standard poinsettias. The trick is to
maintain adequate fertility to promote maximum growth.
For maximum bract expansion, maintain warm
temperatures through finish. Do not grow Princettia as
a cool crop.
Delilah Onofrey is marketing director for Suntory Flowers,
North America. For more information on Princettia, visit
suntoryflowers.com.
Queen Rose Punch

http://www.suntoryflowers.com http://www.GPNMAG.COM

June 2024

Table of Contents for the Digital Edition of June 2024

Table of Contents
Editor's Report | Labor updates
Legislation | Tackling ag labor
Management | All-in-one installation
Labor | Labor survey report
Labor | New H-2A worker protections will start this year
CAST 2024 | CAST crazes of 2024
Pest & Disease Management | Start clean, stay clean
Biologicals | Plant health and biologicals
Dr. Bugs | Biological control agent of Western flower thrips
Forty Under 40 Perspectives | Remote Sales success
Culture Report | Sparkling new Princettia varieties
Duets | Plant pathology perspective from floriculture royalty
AmericanHort | Dive deeper and gain an edge
Product Marketplace
Industry News
Classifieds/Ad Index
June 2024 - 1
June 2024 - 2
June 2024 - Table of Contents
June 2024 - Editor's Report | Labor updates
June 2024 - 5
June 2024 - 6
June 2024 - 7
June 2024 - Legislation | Tackling ag labor
June 2024 - 9
June 2024 - Management | All-in-one installation
June 2024 - 11
June 2024 - 12
June 2024 - 13
June 2024 - Labor | Labor survey report
June 2024 - 15
June 2024 - Labor | New H-2A worker protections will start this year
June 2024 - 17
June 2024 - CAST 2024 | CAST crazes of 2024
June 2024 - 19
June 2024 - 20
June 2024 - 21
June 2024 - 22
June 2024 - 23
June 2024 - Pest & Disease Management | Start clean, stay clean
June 2024 - 25
June 2024 - Biologicals | Plant health and biologicals
June 2024 - 27
June 2024 - 28
June 2024 - 29
June 2024 - Dr. Bugs | Biological control agent of Western flower thrips
June 2024 - 31
June 2024 - Forty Under 40 Perspectives | Remote Sales success
June 2024 - 33
June 2024 - Culture Report | Sparkling new Princettia varieties
June 2024 - 35
June 2024 - 36
June 2024 - 37
June 2024 - Duets | Plant pathology perspective from floriculture royalty
June 2024 - 39
June 2024 - 40
June 2024 - 41
June 2024 - AmericanHort | Dive deeper and gain an edge
June 2024 - 43
June 2024 - Product Marketplace
June 2024 - 45
June 2024 - 46
June 2024 - 47
June 2024 - Industry News
June 2024 - 49
June 2024 - Classifieds/Ad Index
June 2024 - 51
June 2024 - 52
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