3 24 vernalization
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1st Semester exam review
Plant: Evening Primrose
Term: Vernalization
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Evening PrimroseOenothera odorata
• Plant type: Perennial• USDA Hardiness Zones: 5 - 9 • Height: 2 - 3’, Spread: 12" to 15" • Exposure: Full sun • Bloom Color: Yellow • Bloom Time: Mid Spring to Mid Fall • Uses: Border plant, Rock garden, • Does not flower 1st year• Opens every evening at dusk• Video
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Primroses
• Primula
• Oenothera
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Vernalization
• Requirement of plants to go through a period of cold before they can flower.
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Scarification
• Cutting the seed coat using acid, sand paper, or a knife to encourage germination
• Redbud tree seeds require scarification
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Stratification
• Requirement of some seeds to go through a cold period before they will sprout
• Maple & Walnut trees
• Sage, coneflowers, columbine