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Grower Success Guide A–Z growing guidelines in an easy-to-read, quick-reference format. Updated for 2021–2022 and is now standalone for easy reference in the greenhouse or on-the-go!
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SEED PROPAGATION
SEED PROPAGATION
SEED PROPAGATION
SEED PROPAGATION
SEEDS/CELL SEED COVER GERM TIME MEDIA pH/EC Grower Success Guide 7–8 weeks 72–7 °F (22–26 °C) 1-2 Not required for germination pH: 5.5–5.9 SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC SOIL TEMP 7–9 weeks 72–78 °F (23–25 °C) 1 Not required for germination pH: 5.5–5.9 No 14 days Cleome SPARKLER™ F1 Cleome hassleriana REC TRAY FORMS PLUG TIME 288-cell tray Primed 3–4 weeks SME 0.5–0.75 mS/cm 72–78 °F (23–25 °C)
SOIL TEMP Cel sia BRIGHT SPARKS™ OP Celosia plumosa erecta R C TRAY FORMS PLUG TIME
Begonia BADA BING®/BADA BOOM® F1 Begonia semperflore s REC TRAY FORMS PLUG TIME
Begonia BADA BING®/BADA BOOM® F1 Begonia semperflorens REC TRAY FORMS PLUG TIME SOIL TEMP GERM LIGHT
Celosia BRIGHT SPARKS™ OP Celosia plumosa erecta REC TRAY FORMS PLUG TIME MEDIA pH/EC SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
GERM LIGHT S EDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw, Pelleted
7–8 weeks
1-2
288-cell tray No
Raw, Pelleted 6–8 days
Raw 2–4 days pH: 5.5–5.9 SME 0.9–1.3 mS/cm Comments: Br ght Sparks is a facultativ shor day variety and will flower fast r under short days. If sowing under sho t ays, it is vital to gr w the plugs under a day l ngth of at least 14 hour to promote sufficient vegetat ve growth before flowering. No 288-cell tray 6–8 days 72–78 °F (22–26 °C) 4–5 weeks Not required for germination pH: 5.5–5.9 1 Yes Raw
288-cell tray pH: 5.5–5.9 SME 0.9–1.3 mS/cm Comments: Bright Sparks is a facultative short day variety and will flower faster under short days. If sowing under short days, it is vital to grow the plugs under a day length of at least 14 hours to promote sufficient vegetative growth before flowering. 4–5 weeks 70–7 °F (21–24 °C) 1 Required for germination Yes 2–4 days 70–75 °F (21–24 °C) Required for germination
SME 0.5–0.75 mS/cm Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If germinating on the bench it is helpful to cover trays with Reemay or similar t help retain humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around in the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplemental HID light ill promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobutrazol grown in them. Most Begonia semperflorens will stop growing if exposed to any level of paclobutrazol. Do not irrigate with recycled water for this reason. SME 0.5–0.75 mS/cm
Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If g minat on the bench i is h lpfu to cover rays with Reemay r similar t help r tain humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around i the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplemental HID light ill promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobut azol grown in them. Mo t Begonia semperflorens will top growing if ex os d to any level f pacl but azol. Do not irrigate with recycled water for this reason.
Cleome SPARKLER™ F1 Cleome hassleriana REC TRAY FORMS PLUG TIME SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
Begonia BOSSA NOVA™ F1 Begonia boliviensis REC TRAY FORMS PLUG TIME
Begonia BOSSA NOVA™ F1 Begonia boliviensis REC TRAY FORMS PLUG TIME SOIL TEMP
1
288-cell tray Yes
Primed 4–6 ays
3–4 weeks 80–85 °F (26–30 °C) days; 68–70 °F (20–21 °C) nights
1 Required for germination
Yes
4–6 days
80–85 °F (26–30 °C) days; 68–70 °F (20–21 °C) nights
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
SEEDS/CELL S ED COVER GERM TIME
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
7–9 weeks
1
288-cell tray No
Pelleted
14 days
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Fluctuating day/night temps will help improve germination. Cleome is a heavy feeder; start feeding in the plug about two weeks after sowing.
Comments: Fluctuating day/night temps will help improve germination. Cleome is a heavy feeder; start feeding in the plug abou wo weeks after sowing.
Comments: Irrigate early in the day to avoid leaf scorch when high light levels are present. Allowing the soil surf ce to dry between irrigations will reduce algae growth.
Comments: Irrigate early in the day to avoid leaf scorch when high light levels are present. Allowing the soil surface to dry between irrigations will reduce algae growth.
Cleome SPARKLER™ 2.0 F1 Cleome hassleriana REC TRAY FORMS PLUG TIME
Cleome SPARKLER™ 2.0 F1 Cleome hassleriana REC TRAY FORMS PLUG TIME SOIL TEMP
Begonia EUREKA™ F1 Begonia semperflorens REC TRAY FORMS PLUG TIME
Begonia EUREKA™ F1 Begonia semperflorens REC TRAY FORMS PLUG TIME SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
3–4 weeks
1
288-cell tray Yes
Raw 4–6 days
3–4 weeks 80–85 °F (26–30 °C) days; 68–70 °F (20–21 °C) nights
1 Required for germination
Yes
4–6 days
80–85 °F (26–30 °C) days; 68–70 °F (20–21 °C) nights
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
288-cell tray
Pelleted
7–8 weeks
1-2
288-cell tray No
Pelleted 6–8 days
7–8 weeks 72–7 °F (22–26 °C)
1-2 Not required for germination pH: 5.5–5.9 No
6–8 days
72–78 °F (22–26 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If germinating on the bench it is helpful to cover trays with Reemay or similar t help retain humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around in the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplemental HID light will promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobutrazol grown in them. Most Begonia semperflorens will stop growing if exposed to any level of paclobutrazol. Do not irrigate with recycled water for this reason. SME 0.5–0.75 mS/cm ANNUALS 2021–2022
FPO 288-cell tray Raw 288-cell tray Raw SOIL TEMP GERM LIGHT MEDIA pH/EC No 6–8 days 72–78 °F (22–26 °C) Not required for germination pH: 5.5–5.9 SOIL TEMP GERM LIGHT MEDIA pH/EC No 6–8 days 72–78 °F (22–26 °C) Required for germination pH: 5.5–5.9 SME 0.5–0.75 mS/cm Cosmos APOLLO™ OP Cosmos bipinnatus REC TRAY FORMS PLUG TIME SEEDS/CELL S ED COVER GERM TIME 288-cell tray Raw 4–5 weeks 1 Yes 3–4 days Comments: Cosmos will flower early under short days, so to allow bulking of the plug provide a 14 hour day length during propagating. Cuph a SRIRACHA™ F1 Cuphea lavea REC TRAY FORMS PLUG TIME SEEDS/CELL S ED COVER GERM TIME 288-cell tray Raw 3.5–4 weeks 1 Yes 3–5 days Dahlia FRESCO™ OP Dahlia hybrida REC TRAY FORMS PLUG TIME SEEDS/CELL S ED COVER GERM TIME pH: 5.5–5.9 SME 0.5–0.75 mS/cm
Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If g minat on the bench i is h lpfu to cover rays with Reemay r similar t help r tain humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around i the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplem ntal HID light will promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobut azol grown in them. Mo t Begonia semperflorens will top growing if ex os d to any level f pacl but azol. Do not irrigate with recycled water for this reason.
Comments: Fluctuating day/night temps will help improve germination. Cleome is a heavy feeder; start feeding in the plug about two weeks after sowing.
Comments: Fluctuating day/ i ht temps will help improve germination. Cleom is heavy feeder; start feeding in the plug abou wo weeks after sowing.
Cosmos APOLLO™ OP Cosmos bipinnatus REC TRAY FORMS PLUG TIME SOIL TEMP
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
Begonia TOPSPIN™ F1 Begonia semperflorens REC TRAY FORMS PLUG TIME
Begonia TOPSPIN™ F1 Begonia semperflorens REC TRAY FORMS PLUG TIME SOIL TEMP
4–5 weeks 61–6 °F (16–18 °C)
1 Not required for germination pH: 5.5–5.9 Yes
3–4 days
61–65 °F (16–18 °C)
Not required for germination pH: 5.5–5.9
SME 0.25–0.5 mS/cm
SME 0.25–0.5 mS/cm
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
Comments: Cosmos will flower early under short days, so to allow bulking of the plug provide a 14 hour day length during propagating.
288-cell tray
Pelleted
7–8 weeks
1-2
288-cell tray No
Pelleted 6–8 days
7–8 weeks 72–7 °F (22–26 °C)
1-2 Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If germinating on the bench it is helpful to cover trays with Reemay or similar to help r t in humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around in the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplemental HID light will promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobutrazol grown in them. Most Begonia semperflorens will stop growing if exposed to any level of paclobutrazol. Do not irrigate with recycled water for this reason. SME 0.5–0.75 mS/cm
Cuphea SRIRACHA™ F1 Cuphea llavea REC TRAY FORMS PLUG TIME SOIL TEMP
Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If g minat on the bench i is h lpfu to cover rays with Reemay r similar to help r t in humidity and reduce irrigation frequency. When irrigating use low pressure/volume nozzles/breakers to avoid moving seeds around i the cell. If the daily light integral (DLI) is less than 12 mols/day adding supplem ntal HID light will promote a more uniform crop. Do not use plug trays that have been used previously and had a crop treated with paclobut azol grown in them. Mo t Begonia semperflorens will top growing if ex os d to any level f pacl but azol. Do not irrigate with recycled water for this reason.
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
3.5–4 weeks 70–7 °F (21–24 °C)
1 Not required for germination pH: 5.8–6.2 Yes
3–5 days
70–75 °F (21–24 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Only the first application of plant growth regulators (PGR) is necessary for the plug. After two weeks, you can altern te moisture bet een 2 and 4 to help to the plugs. Provide supplemental lighting if possible if DLI is lees than 8 mols/day.
SME 0.5–0.75 mS/cm Comments: Only the first application of plant growth regulators (PGR) is necessary for the plug. After two weeks, you can alternate moisture between 2 and 4 to help tone the plugs. Provide supplemental lighting if possible if DLI is lees than 8 mols/day.
Begonia Interspecific BOWLER™ F1 Begonia × hybrida REC TRAY FORMS PLUG TIME
Begonia Interspecific BOWLER™ F1 Begonia × hybrida REC TRAY FORMS PLUG TIME SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
288-cell tray
Pelleted
6–7 weeks
1
288-cell tray No
Pelleted 6–8 days
6–7 weeks 72–78 °F (22–26 °C)
1 Required for germination
Dahlia FRESCO™ OP Dahlia hybrida REC TRAY FORMS
SOIL TEMP
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray Comments: Avoid overwatering to prevent excess algae growth and to promote root growth into the media. If germinating on the bench, it is helpful to cover trays with ReeMay® or similar to help reta n humidity nd reduce irrigation frequency. When irrigating, use low pressure/volume nozzles/breakers to avoid moving seeds around i the c ll. If the daily light integral (DLI) is less than 12 mols/day, adding supplem ntal HID light will promote a more uniform crop.
288-cell tray Comments: Avoid overwatering to prevent excess algae growth and to promote root growth into the media. If germinating on the bench, it is helpful to cover trays with ReeMay® or similar to help retain humidity and reduce irrigation frequency. When irrigating, use low pressure/volume nozzles/breakers to avoid moving seeds around in the cell. If the daily light integral (DLI) is less than 12 mols/day, adding supplemental HID light will promote a more uniform crop. Raw, Co ted 3–4 weeks 1 Yes
Raw, Coated 5 days
3–4 weeks 70 °F (21 °C)
1 Not required for germination pH: 5.5–5.9 Yes
5 days
70 °F (21 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
SME 0.5–0.75 mS/cm
Comments: Provide day extension lighting to 12– 14 hours/day to help prevent premature flower bud set.
Comments: Provide day extension lighting to 12– 14 hours/day to help prevent premature flower bud set.
Begonia Interspecific TOPHAT™ F1 Begonia × hybrida REC TRAY FORMS PLUG TIME
Begonia Interspecific TOPHAT™ F1 Begonia × hybrida REC TRAY FORMS PLUG TIME SOIL TEMP
SOIL TEMP Dahlia HARLEQUIN™ OP Dahlia hybrida REC TRAY FORMS PLUG TIME 6–8 days 72–78 °F (22–26 °C) No
Dahlia HARLEQUIN™ OP Dahlia hybrida REC TRAY FORMS PLUG TIME MEDIA pH/EC SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
GERM LIGHT
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
6–7 weeks
1
288-cell tray No
Pelleted 6–8 days
6–7 weeks 72–78 °F (22–26 °C)
1 Not required for germindation
pH: 5.5–5.9 SME 0.5–0.75 mS/cm
Not required for germindation
pH: 5.5–5.9 SME 0.5–0.75 mS/cm
288-cell tray
Raw, Coated
3–4 weeks
1
288-cell tray Yes
Raw, Coated 5 days
3–4 weeks 70 °F (21 °C)
1 Not required for germination pH: 5.5–5.9 Yes
5 days
70 °F (21 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
SME 0.5–0.75 mS/cm
Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If g minat on the bench, it is helpful to cover trays with Reemay r similar to help retain humidity a d re- duce irrigation frequency. When irrigating, use low pressure/volume nozzles/breakers to avoid moving seeds around i the c ll. If the daily light integral (DLI) is less than 12 mols/day, adding supplem ntal HID light will promote a more uniform crop.
Comments: Avoid overwatering to help prevent excess algae growth and to promote root growth into the media. If germinating on the bench, it is helpful to cover trays with Reemay or similar to help retain humidity and re- duce irrigation frequency. When irrigating, use low pressure/volume nozzles/breakers to avoid moving seeds around in the cell. If the daily light integral (DLI) is less than 12 mols/day, adding supplemental HID light will promote a more uniform crop. Comments: Provide day extension lighting to 12-14 hours/day to help prevent premature flower bud set.
Comments: Provide day extension lighting to 12-14 hours/day to help prevent premature flower bud set.
Dianthus DIABUNDA® F1 Dianthus × barbatus REC TRAY FORMS PLUG TIME
Dianthus DIABUNDA® F1 Dianthus × barbatus REC TRAY FORMS PLUG TIME SOIL TEMP
Calendula COSTA™ OP Calendula officinalis REC TRAY FORMS PLUG TIME
Calendula COSTA™ OP Calendula officinalis REC TRAY FORMS PLUG TIME SOIL TEMP
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
SEEDS/CELL S ED COVER GERM TIME
SEEDS/CELL SEED COVER GERM TIME GERM LIGHT MEDIA pH/EC
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
5–10 days Raw, Pelleted
5–6 weeks
1
288-cell tray Yes
Raw, Pelleted 5 days
5–6 weeks 72–74 °F (22–23 °C)
1 Not required for germination pH: 5.5–5.9 Yes
5 days
72–74 °F (22–23 °C)
Not required for germination pH: 5.5–5.9
288-cell tray
Raw
3–4 weeks
1
288-cell tray Yes
Raw 5–10 days
3–4 weeks 70–72 °F (21–22 °C)
1 Not required for germination pH: 5.5–5.9 Yes
70–72 °F (21–22 °C)
Not required for germination pH: 5.5–5.9
SME 0.9–1.3 mS/cm
SME 0.9–1.3 mS/cm
SME 0.5–0.75 mS/cm
SME 0.5–0.75 mS/cm
Comments: Providing high light and dropping the temperature to an ADT of 60 °F (21 °C) will reduce the need for PGRs. Day extension lighting to 14 hours will hasten flowering of the finished plant.
Comments: Providing high light and dropping the temperature to an ADT of 60 °F (21 °C) will reduc the need for PGRs. Day extensi n ligh ing o 14 ho s will hasten flowering of the finished plant.
Comments: Grow on the cool side. Calendulas are not recommended for fall crops where cool c nditio s cannot be maintained.
Comments: Grow on the cool side. Calendulas are not recommended for fall crops where cool conditions cannot be maintained.
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