ANNUALS | SEED FINISHING
FINISH PGRs
TECH TIPS
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.
Under low light conditions supplemental light at 300–400 foot candles (60–80 micro mols) will induce earlier flowering. An overapplication of Bonzi ® can cause the foliage to crinkle.
FINISH PGRs
TECH TIPS
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.
Under low light conditions, supplemental light at 300–400 foot candles (60–80 micro mols) will induce earlier flowering. An overapplication of Bonzi ® can cause the foliage to crinkle.
FINISH PGRs
TECH TIPS
B-Nine ® at 2,500–5,000 ppm or Altercel ™ at 750–1,000 ppm as needed.
Do not apply plant growth regulators (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.
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 (400 foot candles) 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.
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 (400 foot candles) 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.
FINISH PGRs
TECH TIPS
2–3 sprays of Altercel ™ at 750 ppm will help control growth and speed flowering, and is recommended for pack production. Depending on environmental conditions pints may not need any plant growth regulator (PGR) applications except in the plug stage. 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 plainly 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 (400 foot candles) 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 2024–2025
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