ANNUALS | SEED PROPAGATION
Catharanthus roseus F1 Vinca BLOCKBUSTER ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
5 weeks
1
Yes
7–8 days
76–78 °F (24–25 °C)
Not required for germination pH: 5.5–5.9
SME 0.9–1.3 mS/cm
Comments: Soil temperatures lower than 75 °F (23 °C) during germination may decrease germination rates. Keeping media pH at 5.8 or lower will help reduce the likelihood of Thielaviopsis infections.
Catharanthus roseus F1 Vinca CORA ® CASCADE XDR / CORA ® CLASSIC / CORA ® XDR REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
5 weeks
1
Yes
7–8 days
76–78 °F (24–25 °C)
Not required for germination pH: 5.5–5.9
SME 0.9–1.3 mS/cm Comments: Soil temperatures lower than 75 °F (23 °C) during germination may decrease germination rates. Keeping media pH at 5.8 or lower will help reduce the likelihood of Thielaviopsis infections. Although Cora ® XDR performs exceptionally well without the use of fungicides for the control of Aerial Phytophthora, we still recommend chemical rotations as part of a disease resistance management plan against a constantly evolving pathogen. Use Subdue Maxx ® or Segway ® drenches in the plug stage for disease management, and use Medallion ® drenches with rotations of Heritage ® , Micora ® and Segovis ® sprays during the finishing stage. The recommended chemistries also provide additional protection against other diseases that vinca are susceptible to, including Pythium, Rhizoctonia, and Thielaviopsis. For more information on Cora ® XDR visit us at www.syngentaflowers-us. com/cora-xdr.
Catharanthus reseus OP Vinca SUNSTORM ® REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
5 weeks
1
Yes
7–8 days
76–78 °F (24–25 °C)
Not required for germination pH: 5.5–5.9
SME 0.9–1.3 mS/cm
Comments: Soil temperatures lower than 75 °F (23 °C) during germination may decrease germination rates. Keeping media pH at 5.8 or lower will help reduce the likelihood of Thielaviopsis infections.
Celosia plumosa erecta OP Celosia BRIGHT SPARKS ™ 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
2–4 days
70–75 °F (21–24 °C)
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Comments: Bright Sparks celosia will flower early under short days, so to allow bulking of the plug provide a 14-hour day length during propagating.
Cheiranthus cheiri F1 Wallflower SUGAR RUSH ™ 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
9–10 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: To help prevent stretch and floppiness, sprench with Bonzi ® at 1 ppm during seedling emergence.
Cleome hassleriana F1 Cleome SPARKLER ™ 2.0 / SPARKLER ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
3–4 weeks
1
Yes
4–6 days
80–85 °F (26–30 °C) days 68–70 °F (20–21 °C) nights
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Comments: A 15 °F (-9 °C) positive DIF is recommended for best germination results. Cleome is a heavy feeder; start feeding in the plug about 2 weeks after sowing.
Cosmos bipinnatus OP Cosmos APOLLO ™ 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
3–4 days
61–65 °F (16–18 °C)
Not required for germination pH: 5.5–5.9
SME 0.25–0.5 mS/cm
Comments: Cosmos will flower early under short days, so to allow bulking of the plug provide a 14-hour day length during propagating.
Cuphea llavea F1 Cuphea SRIRACHA ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
3.5–4 weeks
1
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 (PGRs) is necessary for the plug. After two weeks, you can alternate moisture levels between 2 and 4 to help tone the plugs. Provide supplemental lighting if possible if DLI is less than 8 mols/day.
GROWER SUCCESS GUIDE 2024–2025
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