2024 Grower Success Guide | Americas

PERENNIALS | VEGETATIVE FINISHING

Helenium autumnale Sneezeweed HAYDAY ™ HARDINESS USDA ZONE

VERNALIZATION

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

5–9

First Year Flowering

pH| 5.8–6.2 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Obligate long day

78–80 °F (26–27 °C)

64–66 °F (18–19 °C)

Tech Tips: Helenium is an obligate long day plant. Helenium will not flower under short days. Day length extension lighting, or night interruption lighting is necessary for flowering under naturally short day lengths. Light the crop with a minimum day length of 14 hours and an average light intensity of 1,200–1,600 µmol·m -2 ·s -1 . Iberis sempervirens Candytuft SNOW CONE ™ / SNOWSURFER ™ / SNOWDRIFT ™

VERNALIZATION

HARDINESS USDA ZONE

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

4–9

Cold Required

37–40 °F (3–4 °C); Avoid pinching after the first week in September to avoid cutting off the next years flowers.

7–10 weeks

7–8 weeks

pH| 5.8–6.2 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Day neutral 68–70 °F (20–21 °C)

58–60 °F (14–16 °C)

Tech Tips: Snow Cone is the fastest Iberis to flower that Syngenta has to offer. This can lead to smaller plants if not given the correct amount of production time. Snowsurfer is best suited for gal. sized containers. Snowdrift is the lastest to flower in the assortment. Iberis x hybrida Candytuft MERMAID ™

VERNALIZATION

HARDINESS USDA ZONE

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

5–9

First Year Flowering

pH| 5.8–6.2 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Day neutral 54–56 °F (12–13 °C)

48–50 °F (9–10 °C)

Tech Tips: Mermaid Iberis do not require vernalization to flower, and will flower in late spring–early summer.

Lavandula angustifolia English Lavender AROMATICO ™ / SENTIVIA ™ HARDINESS USDA ZONE VERNALIZATION

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

5–9

First Year Flowering

pH| 6.1–6.5 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Facultative long day

74–76 °F (23–24 °C)

62–64 °F (17–18 °C)

Tech Tips: Maintain the higher pH range to avoid any nutritional issues. Also it is important to avoid overwatering which could lead to disease issues.

Lavandula angustifolia English Lavender VINTRO ™ HARDINESS USDA ZONE

VERNALIZATION

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

5–9

Cold Required

37–45 °F (3–7 °C); Allow media to dry moderately between thorough waterings.

6–7 weeks

7–8 weeks

pH| 6.1–6.5 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Facultative long day

74–76 °F (23–24 °C)

62–64 °F (17–18 °C)

Tech Tips: Maintain the higher pH range to avoid any nutritional issues. Also it is important to avoid overwatering which could lead to disease issues.

Lavandula stoechas Spanish Lavender JAVELIN ™ / JAVELIN ™ COMPACT HARDINESS USDA ZONE VERNALIZATION REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

7–9

First Year Flowering

pH| 6.1–6.5 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Facultative long day

72–74 °F (22–23 °C)

64–66 °F (18–19 °C)

Tech Tips: Increase air movement around the plants to reduce the chance of foliar disease.

Leucanthemum maximum Shasta Daisy WESTERN STAR ™ HARDINESS USDA ZONE VERNALIZATION

DAY LENGTH

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING CROP TIMING

4–9

Cold Beneficial

Growing cool at 45 °F (7 °C) will ensure a uniform flowering crop.

6–7 weeks

pH| 5.8–6.2 EC| SME EC| 1.5–2.1 mS/cm PourThru EC| 2.3–3.2 mS/cm

Obligate long day

74–76 °F (23–24 °C)

68–70 °F (20–21 °C)

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