2026-2028 Grower Success Guide

ANNUALS | SEED FINISHING

Penstemon hartwegii F1 Penstemon ARABESQUE ® FINISH PGRs

TECH TIPS

Pinching Arabesque penstemon will result in more blooms at the finishing stage but will delay flowering by 2–3 weeks.

Sumagic ® at 5–10 ppm or a tank mix of B-Nine ® WSG at 1,500 ppm plus Altercel ® at 750 ppm. Alternatively, drench with Bonzi ® at 0.5–2.0 ppm. One to two applications are generally needed.

Penstemon hartwegii F1 Penstemon PARTYBELLS ™ FINISH PGRs

TECH TIPS

Provide long days and 68 °F (20 °C) average daily temperature for fastest flowering and finishing.

If grown cool will likely not require PGR applications. However, if needed spray applications of Bonzi ® at 10–15 ppm or Sumagic ® at 5 ppm are effective in controlling stem elongation.

Pentas lanceolata F1 Pentas BEEBRIGHT ™ FINISH PGRs

TECH TIPS

B-Nine ® WSG at 2,500–5,000 ppm, Altercel ® at 750–1,000 ppm, Bonzi ® at 5–10 ppm or A-Rest ® at 3–5 ppm.

Use calcium and nitrate-based fertilizers to maintain pH above 6.1 to prevent iron toxicity symptoms. Additional applications of magnesium sulfate at 1 lb. per 100 gallons every three weeks are recommended to help maintain healthy, green color. Warm temperatures and high light levels will accelerate growth and flowering.

Pentas lanceolata F1 Pentas BEEHIVE ™ FINISH PGRs

TECH TIPS

B-Nine ® WSG at 2,500–5,000 ppm, Altercel ® at 750–1,000 ppm, Bonzi ® at 5–10 ppm or A-Rest ® at 3–5 ppm.

Use calcium and nitrate-based fertilizers to maintain pH above 6.1 to prevent iron toxicity symptoms. Additional applications of magnesium sulfate at 1 lb. per 100 gallons every three weeks is recommended to help maintain healthy, green color. Warm temperatures and high light levels will accelerate growth and flowering.

Pentas lanceolata F1 Pentas HONEYCLUSTER ™ FINISH PGRs

TECH TIPS

B-Nine ® WSG at 2,500–5,000 ppm, Altercel ® at 750–1,000 ppm, Bonzi ® at 5–10 ppm or A-Rest ® at 3–5 ppm.

Use calcium and nitrate-based fertilizers to maintain pH above 6.1 to prevent iron toxicity symptoms. Additional applications of magnesium sulfate at 1 lb. per 100 gallons every three weeks are recommended to help maintain healthy, green color. Warm temperatures and high light levels will accelerate growth and flowering.

Petunia grandiflora F1 Petunia grandiflora DUVET ™ FINISH PGRs

TECH TIPS

VARIETY

VIGOR TIMING MPR

Providing cool temperatures, high light and growing on the dry side will help keep petunias more compact. Early morning DIF treatments also help. Providing long day lighting during short days will shorten time to flower.

B-Nine ® WSG at 2,500–3,500 ppm or Bonzi ® at 5–15 ppm. Bonzi ® drenches are not recommended.

Duvet ™ Blue 70067196

M 11.5 hrs. M 10.5 hrs.

Duvet ™ Burgundy 70059297 Duvet ™ Mix 70048780 Duvet ™ Pink 70040978 Duvet ™ Red Imp. 70059290 Duvet ™ Salmon 70040985

M 11.5 hrs. M 13.5 hrs. E–M 10.5 hrs.

Duvet ™ White 70040988 E–M 10.5 hrs. *MPR is Minimum Photoperiod Recommendation. See page 130 for further explanation of how to use this MPR.

Petunia grandiflora F1 Petunia grandiflora FROST ™ FINISH PGRs

TECH TIPS

Providing cool temperatures, high light and growing on the dry side will help keep petunias more compact. Early morning DIF treatments also help. Providing long day lighting during short days will shorten time to flower.

Responds well to B-Nine ® WSG sprays at 2,500–3,500 ppm. Bonzi ® drenches at 1–2 ppm during later stages in the crop will reduce stretch and will not affect flowering as much as B-Nine ® WSG.

GROWER SUCCESS GUIDE 2026–2028

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