SEED PROPAGATION
Gerbera BENGAL ™ / CARTWHEEL ® / ELEPHANT ™ / JAGUAR ™ F1 Gerbera jamesonii REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP
GERM LIGHT
MEDIA pH/EC
128-cell tray pH: 5.5–5.9 SME 0.5–0.75 mS/cm Comments: Under low light conditions provide supplemental HID light if possible; do not extend day length as this will extend the time to flower. It is critical to allow adequate dry back between irrigations to prevent stunted and distorted growth. Because of this do not mist at night. If germinating on a bench it is best to use a tent system to increase humidity and reduce the frequency of irrigations/misting. SatinCoat ™ 5–6 weeks 1 No 4 days 74–76 °F (23–24 °C) Required for germination
Hibiscus HONEYMOON ™ F1 Hibiscus moscheutos REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
200-cell tray
Raw
3–4 weeks
1
Yes
3–5 days
75–81 °F (24–27 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: If Altercel ® is applied, seedlings may temporarily yellow. Begin feeding at 75 ppm N at radical emergence.
Impatiens ACCENT ™ / ACCENT ™ PREMIUM / ATHENA ™ / XTREME ™ F1 Impatiens walleriana REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–5 weeks
1
Yes
3–5 days
72–75 °F (22–24 °C)
Required for germination
pH: 5.8–6.2 SME 0.5–0.75 mS/cm
Comments: Use a calcium-based fertilizer and feed once a week at most to avoid soft growth and stretching of plugs. Do not let plants go into the night with wet foliage or tip abortion may occur. Downward cupping or twisting of immature leaves may be caused by overuse of plant growth regulators (PGRs). Subdue Maxx ® and/or Segway ® drenches are recommended plug stage fungicides for disease management.
Impatiens IMARA ® XDR F1 Impatiens walleriana REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–5 weeks
1
Yes
3–5 days
72–75 °F (22–24 °C)
Required for germination
pH: 5.8–6.2 SME 0.5–0.75 mS/cm
Comments: Use a calcium-based fertilizer and feed once a week at most to avoid soft growth and stretching of plugs. Do not let plants go into the night with wet foliage or tip abortion may occur. Downward cupping or twisting of immature leaves may be caused by overuse of plant growth regulators (PGRs). Subdue Maxx ® and/or Segway ® drenches are recommended plug stage fungicides for disease management, and rotations of Mural ® and Micora ® sprays and Segovis ® sprays or drenches are recommended for the finishing stage. For more information on Imara ® XDR visit us at www.syngentaflowers-us.com/Imara.
Impatiens New Guinea FLORIFIC ® F1 Impatiens hawkeri REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–6 weeks
1
Yes
8 days
70–75 °F (21–24 °C)
Not required for germination pH: 5.8–6.2
SME 0.9–1.3 mS/cm
Comments: Ensure a good scouting program for thrips is in place.
Marigold African ANTIGUA ™ / BIG TOP ™ / INCA II ™ / PERFECTION ™ F1 Tagetes erecta REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Detailed, SatinCoat ™
4–5 weeks
1
Yes
3–5 days
72–75 °F (22–24 °C)
Not required for germination pH: 6.1–6.5
SME 0.5–0.75 mS/cm
Comments: Easy to germinate on the bench. Maintain media pH above 6.2 to avoid iron/manganese toxicity. Short days will shorten time to flower.
Marigold French anemone ALUMIA ™ OP Tagetes patula nana REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Coated, Detailed
3–4 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size.
Marigold French crested CRESTA ™ Tagetes patula nana REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Detailed, SatinCoat ™
3–4 weeks
1
Yes
3–5 days
70–72 °F (21–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: French Marigolds are very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size.
GROWER SUCCESS GUIDE 2023-2024 | ANNUALS
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