Is it possible to make a Zinnia etc not cross?
I have read conflicting statements about whether zinnia will be true to parent. I Have a couple of questions:
1. If you only grow one type of nasturtium or zinnia etc, will then the seed they produce be true to parent?(nothing in your neighbors yards)
2. If you are growing a few varieties, and you cover one plant with netting before first flowers open, then will the seeds of this plant be true?
Or is it simply that due to some recessive characteristics, you will never know what you get?