ANNUALS | SEED FINISHING
FINISH PGRs
TECH TIPS
Usually not required if growing cool. If conditions are warmer or darker than ideal spray with B-Nine ® WSG at 2,500–5,000 ppm.
Keep media pH below 5.8 to help avoid Thielaviopsis infections. Under hot temperatures provide lower light levels to reduce heat stress. Do not hold Pansy plugs—transplant before plugs get root bound. Malformed and puckered leaves indicate calcium or boron deficiencies. To prevent this, fertilize with plug special (13–2–13) or a Cal-Mag ® Plus fertilizer (14–4–14). Boron deficiencies can be distinguished by tip abortion, upper leaf stunting, puckering and thickening of leaves, along with shortened internodes and/or a gnarled mass of lateral shoots. Boron deficiency is more prevalent during warm weather with frequent watering. A borax or Solubor ® drench will help overcome these problems, as well as increase the airflow within the greenhouse.
FINISH PGRs
TECH TIPS
Usually not required if growing cool. If conditions are warmer or darker than ideal spray with B-Nine ® WSG at 2,500–5,000 ppm.
Keep media pH below 5.8 to help avoid Thielaviopsis infections. Under hot temperatures provide lower light levels to reduce heat stress. Do not hold Pansy plugs—transplant before plugs get root bound. Malformed and puckered leaves indicate calcium or boron deficiencies. To prevent this, fertilize with plug special (13–2–13) or a Cal-Mag ® Plus fertilizer (14–4–14). Boron deficiencies can be distinguished by tip abortion, upper leaf stunting, puckering and thickening of leaves, along with shortened internodes and/or a gnarled mass of lateral shoots. Boron deficiency is more prevalent during warm weather with frequent watering. A borax or Solubor ® drench will help overcome these problems, as well as increase the airflow within the greenhouse.
FINISH PGRs
TECH TIPS
B-Nine ® WSG at 2,500–5,000 ppm 1–3 times depending on container size and environmental conditions. Start PGR applications early—about one week after transplant. To prevent late flower stem, stretch drench with Bonzi ® at 1–2 ppm when flowers start to show color.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections. Incorporate Postiva ™ into chemical rotation plan for bacterial leaf spot (BLS) control.
FINISH PGRs
TECH TIPS
B-Nine ® WSG at 2,500–5,000 ppm if needed.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections. Incorporate Postiva ™ into chemical rotation plan for bacterial leaf spot (BLS) control.
FINISH PGRs
TECH TIPS
Spray with B-Nine ® WSG at 2,500–5,000 ppm 1–3 times depending on container size and environmental conditions. Start plant growth regulator (PGR) applications early—about one week after transplant. To prevent late flower stem stretch drench with Bonzi ® at 1–2 ppm when flowers start to show color.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections. Incorporate Postiva ™ into chemical rotation plan for bacterial leaf spot (BLS) control.
FINISH PGRs
TECH TIPS
Spray with B-Nine ® WSG at 2,500–5,000 ppm 1–3 times depending on container size and environmental conditions. Start plant growth regulator (PGR) applications early—about one week after transplant. To prevent late flower stem stretch drench with Bonzi ® at 1–2 ppm when flowers start to show color.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections. Incorporate Postiva ™ into chemical rotation plan for bacterial leaf spot (BLS) control.
FINISH PGRs
TECH TIPS
Spray with B-Nine ® WSG at 2,500–5,000 ppm 1–3 times depending on container size and environmental conditions. Start plant growth regulator (PGR) applications early—about one week after transplant. To prevent late flower stem stretch drench with Bonzi ® at 1–2 ppm when flowers start to show color.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections. Incorporate Postiva ™ into chemical rotation plan for bacterial leaf spot (BLS) control.
FINISH PGRs
TECH TIPS
Spray with B-Nine ® WSG at 2,500–5,000 ppm 1–3 times depending on container size and environmental conditions. Start PGR applications about 10–14 days after transplant. To prevent late flower stem stretch drench with Bonzi ® at 0.5–1 ppm when flowers start to show color.
Extending the day length during short days to 14 hours will help ensure the first flowers will be fully double. Do not overwater—Zinnias are susceptible to root rot diseases. Growing at lower than recommended temperatures can also lead to root disease issues. Proper air circulation will help reduce the likelihood of powdery mildew infections.
GROWER SUCCESS GUIDE 2024–2025
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