SEED FINISHING
FINISH PGRs
TECH TIPS
If needed sprays of B-Nine ® WSG at 2,500–5,000 ppm or A-Rest ® at 2–4 ppm may be applied.
Start with a disinfected growing area and keep media pH below 5.8 to help avoid Thielaviopsis infections. Control Thrips to prevent INSV or TSWV infections. Do not try to finish Vinca early in the North since the plants need high light and warm temperatures to grow adequately. Plant growth regulators (PGRs) are usually not required except in pack production. Never apply Bonzi ® to Vinca since leaf spotting may occur.
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. Also, if very frequent irrigation occurs due to high temperatures, apply a supplemental feed of Solubor ® to avoid boron deficiency.
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. Also, if very frequent irrigation occurs due to high temperatures, apply a supplemental feed of Solubor ® to avoid Boron deficiency.
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. Also, if very frequent irrigation occurs due to high temperatures apply a supplemental feed of Solubor ® to avoid boron deficiency.
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. Also, if frequent irrigation occurs due to high temperatures, apply a supplemental feed of Solubor ® to avoid boron deficiency.
FINISH PGRs
TECH TIPS
Fall crops usually require a plant growth regulator (PGR) application due to the warmer temperatures. Sprays of B-Nine ® WSG at 2,500 ppm plus Cycocel ® at 1,000 ppm are effective as are sprays of Bonzi ® at 20 ppm.
Providing day length of longer than 13 hours in the spring will promote faster flowering. Do not let media stay saturated during periods of low light levels or root rot may occur.
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.
G R O W E R S U C C E S S G U I D E 2 0 2 2 – 2 0 2 3 | A N N U A L S
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