2026-2028 Grower Success Guide

PERENNIALS | SEED FINISHING

Lavandula stoechas Spanish Lavender VIOLETA ™ XL VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT BULK CROP TIMING TIMING First Year Flowering

pH: 5.8–6.2 SME EC: 1.5–2.0 mS/cm PourThru EC: 2.3–3.2 mS/cm

Facultative long day 72–74 °F (22–23 °C)

62–64 °F (17–18 °C)

Tech Tips: Once plants are established, one pinch (approximately 10–14 day after transplanting) in the finish container will give the best plant fill and habit.

Papaver nudicaule Iceland Poppy SPRING FEVER ®

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

First Year Flowering

pH: 5.5–5.9 SME EC: 1.5–2.0 mS/cm PourThru EC: 2.3–3.2 mS/cm

Day neutral

60–62 °F (16–17 °C)

58–60 °F (14–16 °C)

Platycodon grandiflorus Balloon Flower TWINKLE ™

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

First Year Flowering

pH: 5.5–5.9 SME EC: 1.5–2.0 mS/cm PourThru EC: 2.3–3.2 mS/cm

Day neutral

64–66 °F (18–19 °C)

60–62 °F (16–17 °C)

Tech Tips: Plants can be grown under short days to bulk plants prior to flowering, but crop time will be longer.

Pritzelago alpina Chamois Cress ICECUBE ™

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

Cold Required

Closely monitor moisture levels and do not allow plants to wilt, with temperatures at 40–50 °F (5–10 °C)

7–8 weeks

7–8 weeks

pH: 5.8–6.2 SME EC: 0.9–1.3 mS/cm PourThru EC: 1.4–2.0 mS/cm

Day neutral

62–64 °F (17–18 °C)

56–58 °F (13–14 °C)

Tech Tips: Best suited for small containers.

Salvia x superba Salvia MERLEAU ®

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

First Year Flowering Option to vernalize for early spring flowering

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

Facultative long day 70–72 °F (21–22 °C)

64–66 °F (18–19 °C)

Tech Tips: No vernalization is required but plants will flower earlier in the spring if vernalized.

Saxifraga x arendsii Saxifraga LOFTY ™

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

Cold Required

Temperatures of 35–45 °F (2–7 °C)

5–7 weeks

9–12 weeks

pH: 5.8–6.2 SME EC: 0.9–1.3 mS/cm PourThru EC: 1.4–2.0 mS/cm

Day neutral

66–68 °F (19–20 °C)

54–56 °F (12–13 °C)

Tech Tips: Keep evenly moist and don’t allow to completely dry out for uniform and consistent flowering.

Sedum telephium Sedum SURRENDER ™

VERNALIZATION (PRE- OR POST-TRANSPLANT)

DAY TEMP

NIGHT TEMP

MEDIA PH / EC

DAY LENGTH

REQUIREMENT CULTURE REQUIREMENT

BULK TIMING

TIMING

First Year Flowering

pH: 5.8–6.2 SME EC: 0.9–1.3 mS/cm PourThru EC: 1.4–2.0 mS/cm

Obligate long day

74–76 °F (23–24 °C)

64–66 °F (18–19 °C)

Tech Tips: Vernalization is not required for this first year flowering, perennial sedum.

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