ANNUALS | SEED FINISHING
Impatiens walleriana F1 Impatiens XTREME ™ FINISH PGRs
TECH TIPS
Responsive to B-Nine ® WSG, Bonzi ® and Sumagic ® . Xtreme Impatiens are bred to be more compact than standard Impatiens so may require less PGRs.
Use a calcium-based fertilizer and feed once a week at most to avoid soft growth and stretching of plants. Do not let plants go into the night with wet foliage or tip abortion may occur, especially during early stages of growth. Downward cupping or twisting of immature leaves may be caused by overuse of PGRs. It is better to use less water and fertilizer than PGRs to control growth. Preventive fungicide applications for foliar and root disease are recommended, especially in high humidity environments. Subdue Maxx ® , Mural ® , Micora ® , and Segovis ® fungicides can be used in a rotation program to control the common disease problems of Impatiens.
Mimulus × hybrida F1 Mimulus MAGIC ™ FINISH PGRs
TECH TIPS
If plugs were provided 14-hour days, then day extension lighting isn’t required after transplant. Growing Magic mimulus in cool conditions will give the best quality plants. Control thrips to reduce the chance of INSV infections.
Under proper growing conditions, PGRs are usually not needed. If warm and/or dark conditions exist, sprays of B-Nine ® WSG at 2,500 ppm are effective.
Nicotiana × sanderea F1 Nicotiana PERFUME ™ FINISH PGRs
TECH TIPS
Under low light conditions supplemental light at 60–80 µmol·m -2 ·s -1 will induce earlier flowering. An overapplication of Bonzi ® can cause the foliage to crinkle.
If needed to control height, spray with B-Nine ® WSG at 2,500–5,000 ppm, A-Rest ® at 3–7 ppm, Bonzi ® at 10–30 ppm, or Sumagic ® at 5–10 ppm.
Nicotiana × alata F1 Nicotiana SARATOGA ™ FINISH PGRs
TECH TIPS
Under low light conditions, supplemental light at 60–80 µmol·m -2 ·s -1 will induce earlier flowering. An overapplication of Bonzi ® can cause the foliage to crinkle.
If needed to control height spray with B-Nine ® WSG at 2,500–5,000 ppm, A-Rest ® at 3–7 ppm, Bonzi ® at 10–30 ppm or Sumagic ® at 5–10 ppm.
Nicotiana × alata Nicotiana WHISPER ™ FINISH PGRs
TECH TIPS
Not applicable.
Flowers will be harvestable 4–6 weeks after transplanting and will continue to flower until frost. Plant can be sheared with regrowth in 6 weeks.
Osteospermum ecklonis F1 Osteospermum ASTI ™ FINISH PGRs
TECH TIPS
B-Nine ® at 2,500–5,000 ppm or Altercel ® at 750–1,000 ppm as needed.
Do not apply PGRs after buds have set to avoid reduction in flower size. Asti Osteospermum does not require vernalization to flower but will have the highest bud count grown under high light coupled with cool temperatures.
Pelargonium × hortorum F1 Geranium BULLSEYE ™ FINISH PGRs
TECH TIPS
3–5 sprays of Altercel ® at 750 ppm will help control growth and speed flowering. Do not apply more than 750 ppm Altercel ® or leaf edge yellowing may occur. Using a spray adjuvant such as CapSil ® will reduce the chance of leaf edge yellowing. Spray every 10–14 days depending on environmental conditions and plant growth. Stop applying Altercel ® when flower buds are visible.
Geraniums are irradiance plants so the more light they receive the faster they will flower. Under short days or cloudy conditions it is beneficial to provide supplemental lighting of around 80 µmol·m -2 ·s -1 to speed up flowering. All geraniums are especially sensitive to bacterial diseases so be sure to start with clean containers, media and growing areas. Do not subirrigate or use recycled water. Do not grow a hanging geranium crop over another geranium crop. Media pH should not drop below 6.0 or the plants may suffer from iron and/ or manganese toxicity. Avoid use of ammonium-based fertilizers to help maintain proper media pH. Instead, use nitrate-based Cal-Mag ® Plus fertilizers for the entire growth cycle of geraniums. Keeping media saturated will promote Pythium root rot infections. Proper air circulation is very important at time of flowering to reduce likelihood of Botrytis flower petal blight.
GROWER SUCCESS GUIDE 2026–2028
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