Zinnias are actually light sensitive so if you start them too late you’ll have to wait ages for summer flowers!
I’m mindful that it’s cold on Sunday night, so if you sow your Zinnias this weekend by the time they are up and ready to into the greenhouse the temperatures will have risen again and you won’t be tripping over seed trays. All the details are in the video
Page 33 of the Spring Grow-A-Long Handbook
You can find more about the seeds and plants we grow by visiting our website
https://zoewoodwardgardening.com/
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