ANNUALS | SEED PROPAGATION
Impatiens walleriana F1 Impatiens ACCENT ™ / ACCENT ™ PREMIUM / ATHENA ™ / XTREME ™ 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 walleriana F1 Impatiens IMARA ® XDR 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.
Mimulus × hybrida F1 Mimulus MAGIC ™ REC TRAY FORMS
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
4–5 weeks
1
No
5–7 days
65–68 °F (18–20 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Provide day extension lighting to 14 hours under short days. Using HID lights can promote too early of flowering.
Nicotiana × sandrea F1 Nicotiana PERFUME ™ / SARATOGA ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
4–5 weeks
1
No
3–5 days
70–75 °F (21–24 °C)
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Comments: Cool days with high light will reduce the need to apply plant growth regulators (PGRs).
Osteospermum ecklonis F1 Osteospermum ASTI ™ 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
8–12 days
68–70 °F (21–22 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm Comments: It is very important to spray the plugs with Altercel ™ at 300 ppm about 10 days after sowing to help reduce hypocotyl stretch. Shorter hypocotyls will result in a stronger central stem after transplant and will reduce floppiness in the finished plant.
Pelargonium × hortorum F1 Geranium BULLSEYE ™ / MAVERICK ™ / MULTIBLOOM ™ / PINTO ™ PREMIUM / QUANTUM ™ / RINGO 2000 ™ REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP GERM LIGHT
MEDIA pH/EC
288-cell tray
Coated
4–5 weeks
1
Yes
1–3 days
73 °F (23 °C)
Not required for germination pH: 6.1–6.5
SME 0.9–1.3 mS/cm Comments: 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) especially in the plug tray to speed up flowering. All geraniums are especially sensitive to bacterial diseases so be sure to start with clean plug trays, media and propagation areas. Geranium seeds do not carry bacterial diseases so if you start clean you can stay clean. Do not subirrigate or use recycled water. Media pH should not drop below 6.0 or the plants may suffer from iron and/or manganese toxicity.
Pelargonium peltatum F1 Geranium Ivy REACH OUT ™ / TORNADO ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Coated
5–6 weeks
1
Yes
4 days
73 °F (23 °C)
Not required for germination pH: 5.8–6.2
SME 0.9–1.3 mS/cm Comments: 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) especially in the plug tray to speed up flowering. All geraniums are especially sensitive to bacterial diseases so be sure to start with clean plug trays, media and propagation areas. Geranium seeds do not carry bacterial diseases so if you start clean you can stay clean. Do not subirrigate or use recycled water. Media pH should not drop below 5.8 or the plants may suffer from iron and/or manganese toxicity.
Penstemon hartwegii F1 Penstemon ARABESQUE ® / PARTYBELLS ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
5–6 weeks
1
Yes
7 days
68–73 °F (20–23 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm
Comments: Warm day temperatures can promote soft growth and excessive stem elongation.
GROWER SUCCESS GUIDE 2024–2025
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