1st Semester exam review

Plant: Evening Primrose

Term: Vernalization

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

Primroses

• Primula

• Oenothera

Vernalization

• Requirement of plants to go through a period of cold before they can flower.

Scarification

• Cutting the seed coat using acid, sand paper, or a knife to encourage germination

• Redbud tree seeds require scarification

Stratification

• Requirement of some seeds to go through a cold period before they will sprout

• Maple & Walnut trees

• Sage, coneflowers, columbine