2024 Grower Success Guide | Americas

PERENNIALS | SEED PROPAGATION

Delphinium elatum Larkspur DELPHINA ™

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

4–8

Spring– Summer 128-cell tray

2–3

Light Vermiculite 65–72° F (18–22° C)

64–68° F (18–20° C)

65 °F (18 °C)

pH: 6.1–6.5 SME 0.5–0.75 mS/cm

Delphinium elatum Larkspur EXCALIBUR ™

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

4–8

Spring– Summer 288-cell tray

2–3

Light Vermiculite 65–72° F (18–22° C)

64–68° F (18–20° C)

66 °F (19 °C)

pH: 6.1–6.5 SME 0.5–0.75 mS/cm

Delphinium grandiflorum Larkspur HUNKY DORY ™

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

5–9

Spring– Summer 288-cell tray

2–3

Light Vermiculite 65–72° F (18–22° C)

64–68° F (18–20° C)

65 °F (18 °C)

pH: 5.8–6.2 SME 0.25–0.5 mS/cm

Dianthus barbatus Sweet William BARBARINI ®

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

288-cell tray

1–2

Light Vermiculite 65–72° F (18–22° C)

62–65° F (16–18° C)

64 °F (18 °C)

pH: 5.5–5.9 SME 0.9–1.3 mS/cm

Digitalis purpurea Foxglove CAMELOT ™

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 128-cell tray

2–3

No Cover

65–70° F (18–21° C)

64–68° F (18–20° C)

62 °F (17 °C)

pH: 5.8–6.2 SME 0.5–0.75 mS/cm

Doronicum orientale Leopard’s Bane LEONARDO ™

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

Pelleted

4–7

Early Spring

288-cell tray

3

No Cover

68–72° F (20–22° C)

64–68° F (18–20° C)

66 °F (19 °C)

pH: 5.8–6.2 SME 0.9–1.3 mS/cm

Echinacea purpurea Coneflower PRAIRIE SPLENDOR ™ / PRAIRIE SPLENDOR ™ COMPACT / PRAIRIE BLAZE ™

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

Spring– Summer 288-cell tray

2– 4

Yes

70–75° F (21–24° C)

62–65° F (16–18° C)

62 °F (17 °C)

pH: 5.8–6.2 SME 0.9–1.3 mS/cm

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