2021-2022 Grower Success Guide | NA

SEED PROPAGATION

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. For more information on Sunfinity ® visit us at www.syngentaflowers-us.com/sunfinity.

Torenia DUCHESS ™ 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.

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 ™ 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.

Verbena OBSESSION ™ CASCADE 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.

Verbena 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 ™ 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 germindation

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 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.

G R O W E R S U C C E S S G U I D E 2 0 2 1 – 2 0 2 2 | A N N U A L S

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