How to get seeds from zinnias? Are they true to color?
I'm going to let some of my zinnia flowers stay on the plant til they produce seeds, but I dont know how long that will take or how to remove them once they are ready. How do you know when they are ready?
Do they need to be wintered over outside in cool weather, or are they ready to grow immediately?
I'm growing tall zinnias of 7 different colors. Will the seeds be true to color, will they be mixed colors?