2024 Grower Success Guide | Americas

PERENNIALS | SEED PROPAGATION

Papaver nudicaule Iceland Poppy SPRING FEVER ®

GERMINATION TEMPERATURE

PRODUCT FORM

HARDINESS USDA ZONE

BLOOMING SEASON

RECOMMENDED TRAY SIZE

SEEDS PER PLUG

SEED COVER

ADT

MEDIA PH / EC

STAGE 1 & 2

STAGE 3 & 4

Raw

3–7

Early Spring–Spring

288-cell tray

3

No Cover

66–72° F (19–22° C)

66–72° F (19–22° C)

62 °F (17 °C)

pH: 5.5–5.9 SME 0.5–0.75 mS/cm

Platycodon grandiflora Balloon Flower TWINKLE ™

GERMINATION TEMPERATURE

PRODUCT FORM

HARDINESS USDA ZONE

BLOOMING SEASON

RECOMMENDED TRAY SIZE

SEEDS PER PLUG

SEED COVER

ADT

MEDIA PH / EC

STAGE 1 & 2

STAGE 3 & 4

Raw

3–8

Spring– Summer 288-cell tray

3–4

No Cover

See ADT

See ADT

62 °F (17 °C)

pH: 5.5–5.9 SME 0.5–0.75 mS/cm

Pritzelago alpina Chamois Cress ICECUBE ™

GERMINATION TEMPERATURE

PRODUCT FORM

HARDINESS USDA ZONE

BLOOMING SEASON

RECOMMENDED TRAY SIZE

SEEDS PER PLUG

SEED COVER

ADT

MEDIA PH / EC

STAGE 1 & 2

STAGE 3 & 4

Raw

3–9

Early Spring– Spring

288-cell tray

3–4

Yes

See ADT

See ADT

63 °F (17.5 °C)

pH: 5.8–6.2 SME 0.5–0.75 mS/cm

Salvia x superba Salvia MERLEAU ®

GERMINATION TEMPERATURE

PRODUCT FORM

HARDINESS USDA ZONE

BLOOMING SEASON

RECOMMENDED TRAY SIZE

SEEDS PER PLUG

SEED COVER

ADT

MEDIA PH / EC

STAGE 1 & 2

STAGE 3 & 4

Raw

4–9

Spring– Summer 288-cell tray

2–3

No Cover

62–68° F (16–20° C)

64–68° F (18–20° C)

68 °F (20 °C)

pH: 5.8–6.2 SME 0.5–0.75 mS/cm

Saxifraga x arendsii Saxifraga LOFTY ™

GERMINATION TEMPERATURE

PRODUCT FORM

HARDINESS USDA ZONE

BLOOMING SEASON

RECOMMENDED TRAY SIZE

SEEDS PER PLUG

SEED COVER

ADT

MEDIA PH / EC

STAGE 1 & 2

STAGE 3 & 4

Raw

4–9

Early Spring– Spring

288-cell tray

2

Yes

See ADT

See ADT

65 °F (19 °C)

pH: 5.8–6.2 SME 0.25–0.5 mS/cm

120

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