2024 Grower Success Guide | Americas

PERENNIALS | SEED PROPAGATION

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

9–10 weeks

Can use 3-4 seeds per cell for more flower stems; light is required for germination, do not cover after sowing; B-Nine ® WSG (daminozide) spray at 1,500–3,000 ppm.

Cold Required

Short vernalization period required for more uniform flowering; if bulking in the plug stage use a 72 cell or larger.

4–5 weeks; Temp 50–55°F (10–13°C); if vernalizing plugs be sure to increase plug size for moisture management.

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

5–6 weeks

Cold Required

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

6–7 weeks

While correct growing temperature will control growth, a B-Nine ® WSG (daminozide) spray at spray at 2,500 ppm can be used.

Cold Required

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

5–6 weeks

As plugs mature, reduce irrigation frequency to tone plants.

First Year Flowering

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

6–7 weeks

Keep fertilizer levels low during plug production because young plants are sensitive to high media salts. Target media EC should be 0.25–0.50 mS/ cm.

First Year Flowering

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

8–9 weeks

If needed, spray B-Nine ® WSG (daminozide) at 1,500–3,750 ppm; Grow plants under short day conditions (less than 12 hours) to avoid early flower initiation.

First Year Flowering

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

9–10 weeks

Grow plants under short day conditions (less than 12 hours) to avoid early flower initiation.

First Year Flowering

CULTURE YOUNG PLANT

VERNALIZATION

PLUG GROW TIME

COMMENTS

REQUIREMENT

CULTURE REQUIREMENT

PLUG TIMING

6–8 weeks

B-Nine ® WSG (daminozide) spray at 2,500 ppm, or a Bonzi ® (paclobutrazol) spray at 5 ppm can be used to tone the plugs; Grow plugs at cool temperatures once germinated for best quality.

First Year Flowering

GROWER SUCCESS GUIDE 2024–2025

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