PERENNIALS | SEED PROPAGATION
Aquilegia caerulea Columbine KIRIGAMI ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
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 spray at 1,500–3,000 ppm.
Cold Required
Arenaria montana Sandwort BLIZZARD ™ COMPACT
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
5–6 weeks
Cold Required
Aurinia saxatilis Alyssum SUMMIT ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
6–7 weeks
While correct growing temperature will control growth, a B-Nine ® WSG spray at 2,500 ppm can be used.
Cold Required
Bellis perennis English Daisy BAM BAM ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
5–6 weeks
As plugs mature, reduce irrigation frequency to tone plants.
First Year Flowering
Bergenia cordifolia Bergenia SHOESHINE ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
6–7 weeks
Keep fertilizer levels low during plug production because young plants are sensitive to high media salts.
First Year Flowering
Campanula carpatica Bellflower PRISTAR ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
8–9 weeks
If needed, spray B-Nine ® WSG at 1,500–3,750 ppm. Grow plants under short day conditions (less than 12 hours) to avoid early flower initiation.
First Year Flowering
Campanula portenschlagiana Bellflower CLOCKWISE ™
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
9–10 weeks
Grow plants under short day conditions (less than 12 hours) to avoid early flower initiation.
First Year Flowering
Coreopsis grandiflora Tickseed ANDIAMO ®
CULTURE YOUNG PLANT
VERNALIZATION REQUIREMENT
PLUG GROW TIME
COMMENTS
REQUIREMENT
6–8 weeks
B-Nine ® WSG spray at 2,500 ppm, or a Bonzi ® 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 2026–2028
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