2023 Success Guide Annuals | Americas

SEED PROPAGATION

Snapdragon SNAPTASTIC ™ / Snapdragon Dwarf SNAPTINI ™ F1 Antirrhinum majus REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME

SOIL TEMP

GERM LIGHT

MEDIA pH/EC

288-cell tray

Raw, Pelleted

5–6 weeks

1

Yes

5 days

72–75 °F (22–24 °C)

Not required for germination pH: 5.5–5.9

SME 0.5–0.75 mS/cm Comments: High pH levels (above 6.2) may promote iron deficiency causing chlorotic young leaves. Overly wet conditions or watering late in the day can cause shoot tip abortion. Keeping the media too wet can also lead to root rot diseases such as Pythium.

Sunflower SUNFINITY ® F1 Helianthus hybrida REC TRAY FORMS PLUG TIME

SEEDS/CELL SEED COVER GERM TIME

SOIL TEMP

GERM LIGHT

MEDIA pH/EC

72-cell

Raw

4 weeks

1

Yes

5–6 days

68–72 °F (20–22 °C)

Not required for germination pH: 5.5–5.8

SME 1.0–1.5 mS/cm Comments: Apply a Bonzi ® (paclobutrazol) sprench at 2–3 ppm within 48 hours of sowing (3–5 quarts per 100 sq ft.) to control hypocotyl stretch. Plugs must be propagated under long day (+13 hour) photoperiods in order to prevent delays in flowering. During warmer periods of plug production, a B-Nine spray at 1,250–2,500 ppm can be applied 3 weeks after sowing to maintain internode control. This can be done only when the first Bonzi media sprench has not managed growth based on expectations. For more information on Sunfinity ® visit us at www.syngentaflowers-us.com/sunfinity.

Torenia HI-LITE ™ F1 Torenia fournieri 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

4–6 days

75 °F (24 °C)

Required for germination

pH: 5.5–5.9 SME 0.5–0.75 mS/cm

Comments: High light levels can cause leaf scorch. Very wet conditions will promote damping-off diseases. Verbena OBSESSION ™ / OBSESSION ™ CASCADE / TUSCANY ® OP Verbena hybrida REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME SOIL TEMP

GERM LIGHT

MEDIA pH/EC

288-cell tray

Raw, Primed

6–7 weeks

1

Yes

4–7 days

73–76 °F (23–24 °C)

Not required for germination pH: 5.5–5.9

SME 0.5–0.75 mS/cm Comments: Verbena need to be germinated on the dry side at moisture level 3. It is best to water in plug trays to moisture level 3 prior to sow, sow the seeds and then irrigate lightly only when needed to maintain moisture level 3.

Vinca BLOCKBUSTER ™ / SUNSTORM ® F1 Catharanthus roseus 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

75–78 °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.

Vinca CORA ® CASCADE XDR / CORA ® CLASSIC / CORA ® XDR F1 Catharanthus roseus 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.

Viola DELTINI ™ F1 Viola cornuta REC TRAY FORMS

PLUG TIME

SEEDS/CELL SEED COVER GERM TIME

SOIL TEMP

GERM LIGHT

MEDIA pH/EC

288-cell tray pH: 5.5–5.9 SME 0.9–1.3 mS/cm Comments: 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. Raw, Primed 4–5 weeks 1 Yes 5 days 65–68 °F (18–20 °C) Required for germination

Viola ENDURIO ® / TIGER EYE ™ F1 Viola cornuta REC TRAY FORMS PLUG TIME

SEEDS/CELL SEED COVER GERM TIME

SOIL TEMP

GERM LIGHT

MEDIA pH/EC

288-cell tray pH: 5.5–5.9 SME 0.9–1.3 mS/cm Comments: 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. Primed 4–5 weeks 1 Yes 5 days 65–68 °F (18–20 °C) Required for germination

GROWER SUCCESS GUIDE 2023-2024 | ANNUALS

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