Sunfinity ® PGR Guide VEGETATIVE • Vegetative Sunfinity ® is a naturally free-branching, and blooming sunflower that is truly unique from any other annual sunflower on the market. • Due to its habit, vegetative Sunfinity ® benefits from one to two applications of plant growth regulators (PGRs) during finishing. • This PGR Guide is designed to help growers make the best choice about when and what PGRs to apply to their crops. • For additional questions or support, reach out to the Syngenta Flowers Technical Team .
Late Summer – Fall Production Recommendation
Spring Production Recommendation
Weeks After Stick
NO PGR
Early 2,500 ppm B-Nine ® WSG Spray + 2 ppm Bonzi ® Drench
2 ppm Bonzi ® Drench (Twice)
2,500 ppm B-Nine ® WSG Spray
2 ppm Bonzi ® Drench
0 1
- -
Stick
Stick
Stick
Stick
-
-
-
-
2,500-3,500 ppm B-Nine ® WSG Spray Transplant (Recommended Pinch)
2,500-3,500 ppm B-Nine ® WSG Spray * Transplant (Recommended Pinch)
2,500-3,500 ppm B-Nine ® WSG Spray * Transplant (Recommended Pinch)
2,500-3,500 ppm B-Nine ® WSG Spray Transplant (Recommended Pinch)
2
-
3
-
-
-
-
-
-
4
2,500 ppm B-Nine ® WSG Spray
2,500 ppm B-Nine ® WSG Spray
2 ppm Bonzi ® Drench
2 ppm Bonzi ® Drench
-
5
- - - - - -
- - - -
- - - -
- -
- -
6 7 8 9
2 ppm Bonzi ® Drench
2 ppm Bonzi ® Drench
-
-
Finish (unpinched)
Finish (unpinched)
Finish (unpinched)
Finish (unpinched)
10 11
Finish (pinched)
Finish (pinched)
Finish (pinched)
Finish (pinched)
N O
P I N C H
P I N C H E D
Pinched at transplant 7-10 day delay in flowering was observed when plants were pinched.
Trial Details: Gilroy, CA (week 46, 2023 to 2, 2024); Photo taken 7 weeks after transplant; Container: 1-gallon (2.5 quart) with 1ppp, Average Daily Temperature: 65.5 °F (18.6 °C), DLI: 9.3 mols/day. * If more control is required for liner shipping, replace the B-Nine ® WSG Spray with a Bonzi ® (paclobutrazol) media sprench at 0.5–1.0 ppm at 2.5–3 weeks after stick. Estimated finish crop time is from transplant of a 105-cell tray and finished at an Average Daily Temperature (ADT) of 69 °F (20°C) and lighting to 13 hours during natural short day.
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