Princettia Production Planner Culture and Timing Guide
Cultivar: Princettia by Suntory Container Size: 6” / 15cm - 1PPP
SOURCE: Plantpeddler
Desired Finish Date
10/3
10/10
10/17
11/21
12/5
Finish Week Crop Type Start Date
Finish Week Operation Transplant RC
41
42
43
48
50
Black Cloth Black Cloth Black Cloth Natural
Natural
5/30 6/27
6/6 7/4
6/13 7/11 7/18
7/18 8/15 8/22
8/1
4 6 7
Pinch Date
8/29
Optional CCC*
7/4
7/11 7/25
9/5
Space
7/18
8/1
9/5 NA
9/19
10 16 17
Short Days
8/1
8/8
8/15 9/26
NA
Opt. Fascination** 9/12
9/19 10/3
10/31 11/14
11/14 11/28
Early Ship
9/26
10/10
Notes Adjust based on your experience & growing conditions. Typically: Deduct 1 LD (long day) week for 4.5” production, add 1 LD week for 6.5”- 1ppp production. Allows for compact mounded finished form. For larger spec, allow one additional week LD. Must use short day/black cloth treatment for early flowering. Natural season is 7.5 wks. Be aware of heat build-up under black cloth. Shade at dark. Extend morning for 13 hours short day minimum. * With good culture, irrigation and spacing, growth regulators are typically not required. ** To expand bracts at finish, apply Fascination at starting rates of 3-4 ppm
Grower To Grower Advice Mike Gooder of Plantpeddler shares secrets of producing the best Princettia crop:
C ompared to a traditional poinsettia, Princettia is easier to grow with less height, disease and pest management. It’s most applicable for 4-inch to 6.5-inch production, along with bowls and pans. Timing schedule is similar to poinsettia. Varieties have a stronger root system that establishes quickly and good root health. Princettia also has a long sales window and is easily timed through the seasons, being photoperiod responsive. Scheduling: Flower timing is 7.5 weeks with gradual maturity. Plants color early with a long peak and hold late. Natural season is late November, depending on location. For early finish, like for October breast cancer awareness sales, black cloth must be used 13 hours continuously. Lighting is required for late crops – night interruption or day-length extension. Starting: 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. Start warm with media temperatures of 72 ˚ -75 ˚ F day/night. As plants develop, growers can reduce temperatures to 65 ˚ -68 ˚ F day/night as bracts expand. For maximum bract
expansion, maintain warm temperatures through finish. Do not grow Princettia as a cool crop. Branching: Princettia is very free branching. Plants can have a tendency to over branch. More branches mean smaller overall bract size. Keep this in mind; it is a different look. Count nodes. The number of bracts desired plus one node is plenty. Many European and Asian producers do a no-pinch production. The earliest stage to consider Fascination is at inflorescence, two weeks prior to shipping. This is very optional. Managing growth: With the exception of Queen Pink, all Princettia varieties are naturally compact and mounding. Maintain adequate space to achieve this form. Minimal to no PGR is required. Growers can use Cycocel post pinch to even things up. PGR sprays and drenches are recommended. We have found success with Cycocel at 750-1250 ppm. Pests & diseases: Monitor and control pests and diseases typical for poinsettia production. Fungus gnat control is critical, especially 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.
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