ANNUALS | SEED PROPAGATION
Phlox drummondii F1 Phlox POPSTARS ™ REC TRAY FORMS
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–5 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Keep EC less than 0.75 mS/cm and avoid the dry-growing method of growth control, as Phlox drummondii are sensitive to high salts.
Primula obconica F1 Primula LIBRE ™ REC TRAY FORMS
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
6–7 weeks
1
Yes
7 days
72–75 °F (22–24 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Control thrips to avoid Tospovirus.
Primula acaulis F1 Primula PRIMERA ™ 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
7 days
64–68 °F (18–20 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Grow plugs on the dry side to avoid excessive algae growth.
Ranunculus asiaticus F1 Ranunculus MACHÉ ™ / MAGIC ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw, Pelleted
8–10 weeks
1
Yes
14–21 days
50–55 °F (10–13 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Control thrips to avoid Tospovirus.
Salvia splendens OP Salvia MOJAVE ™ / SENTRY ™ / SIZZLER ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–5 weeks
1
Yes
5–7 days
72–75 °F (22–24 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Salvia is sensitive to high salts in the plug tray, so do not let the EC rise above 1.5 mS/cm. After fertilization, rinse the plants off with clear water to avoid burning the young growing tips.
Salvia farinacea OP Salvia VICTORIA ™ REC TRAY FORMS
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
6–7 weeks
1
Yes
5–7 days
72–75 °F (22–24 °C)
Not required for germination pH: 5.5–5.8
SME 0.5–0.75 mS/cm Comments: Salvia is sensitive to high salts in the plug tray, so do not let the EC rise above 1.5 mS/cm. After fertilization, rinse the plugs off with clear water to avoid burning the young growing tips. Salvia farinacea is a long day crop so extending the day length to at least 14 hours with HID lights at true leaf stage is beneficial.
Schizanthus × wisetonensis F1 Schizanthus ATLANTIS ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–7 weeks
1
Yes
7–14 days
62–65 °F (17–19 °C)
Not required for germination pH: 5.8–6.2
SME 0.25–0.5 mS/cm
Comments: Keep plugs under short days to avoid premature flowering.
Tagetes erecta F1 Marigold African ANTIGUA ™ / INCA II ™ / PERFECTION ™ REC TRAY FORMS PLUG TIME SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Detailed, SatinCoat ™
4–5 weeks
1
Yes
3–5 days
72–75 °F (22–24 °C)
Not required for germination pH: 6.1–6.5
SME 0.5–0.75 mS/cm
Comments: Easy to germinate on the bench. Maintain media pH above 6.1 to avoid iron/manganese toxicity. Short days will shorten time to flower.
Tagetes patula nana OP Marigold French anemone ALUMIA ™ REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Coated, Detailed
3–4 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size.
GROWER SUCCESS GUIDE 2024–2025
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