flowers - A to C

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Zones: Annual to zone 2

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Propagation: By seeds

Seed Starting: Direct sow outdoors after last frost. Stratification is not needed.

Seed Viability: 6 years

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Seed Saving Level: Easy

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Zones: Annual to zone 2

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Propagation: By seeds

Seed Starting: Direct sow outdoors after last frost. Stratification is not needed.

Seed Viability: 6 years

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Seed Saving Level: Easy

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Flower Type: Perfect flower; flowers are cross-pollinated by insects  

Difficulty: Easy seed saving; Easy growing 

Seed Viability: 5 years  

Isolation Distance: 600 feet

Seed Collecting: The seeds mature 4-8 weeks after pollination occurs. Collect the flower heads as they mature and the petals die. Each flower contains two cell capsules that can contain anywhere from 100 – 300 seeds. Allow the flower seed pods to dry thoroughly for 2-3 weeks and then break open to remove the small seeds.  

Seed Storage: Store the seeds in a paper envelope or inside a glass mason jar and place in a cool, dry, dark place for better preserved seed viability  

Tips: Most of the petunias sold in garden centers are hybrids, so seed saving will not always produce the same flowers the following year. That being said, the flowers that grow from hybrid seeds are sometimes very colorful and unique! Grow them year after year to develop your own regionally-adapted variety. (Double-flowered petunias do not always produce seeds)

Zones: Annual to zone 2

Pollination: Capable of self-pollination, but also pollinated by insects. Different varieties will cross-pollinate with each other and with wild sunflowers

Isolation Distance: 200-1500 meters

Propagation: By seeds

Seed Starting: Direct seed outdoors after dangers of frost have passed. Sunflowers can be started indoors but generally do not like to be transplanted very much. Sow 1" deep.

Seed Viability: 3-7 years

Minimum Plants for Seed Saving: 10-80 

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Seed Saving: Wait for flower petals to die back and for the sunflower head to start to become brown, cut back stalk and hang upside down in a dry location safe from birds and wildlife to further dry down. Once seed heads are completely dry, seed heads can be rubbed together or ran over a colander to loosen seeds.

Tips: Avoid laying heads flat on a surface as this encourages mold growth. 

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Zones: Annual to zone 2

Pollination: Insects. Different varieties will cross-pollinate

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Propagation: By seeds

Seed Starting: Start indoors 7-8 weeks before last frost. Sow 1/4" deep and keep at 21C - 25C. Seedlings emerge in 7 - 21 days. Stratification is not recommended. Zinnias are fast growing, pinch back seedlings when 4" - 6" tall to encourage bushier growth.

Seed Viability: 6-10 years

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Seed Saving Level: Easy

Seed Saving: Zinnias can carry powdery mildew, so ensure seeds are not harvested from infected pants. Do not let flower heads get wet right before harvest. Once flower heads are spent and start dying back, flower heads can be cut and placed on a screen to finish drying. Flower heads are lightly threshed to break apart and release seeds. Winnow to remove chaff.