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Q.Questions About Zinnias

Zone 78613 | Anonymous added on July 30, 2022 | Answered

1. How soon can you sow freshly harvested Zinnia seeds? or do I have to wait till next spring. 2. Can seeds be collected from cut Zinnia flowers once they have dried or do flowers have to be dried on the plant?

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GKH_Susan
Certified GKH Gardening Expert
Answered on August 10, 2022

Seeds need to mature on the plant before they are harvested. Zinna seeds mature to black on dry flowerheads. They don't need any special cold treatment before planting the seeds, so you can plant them after harvesting if you have enough growing time left in the year before any cold spells. They are not frost hardy. Here is more:

https://www.gardeningknowhow.com/ornamental/flowers/zinnia/growing-zinnia-flowers.htm

https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seed-harvesting-in-autumn.htm

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