Cereus-validus wrote:

Don't be so naive. Plants chrysanthemummmmmmre complex nutrients than just
plain
water to produce mature fertile seeds. Cutting off the supply of the
necessary nutrients causes the developing ovules (if any) to abort. The
cut flowers are pretreated by the florist by soaking them in a bleach
solution that does just that.

Most florist cut flowers are single clones that are usually not
self-fertile anyway.

I've saved and germinated seed from florist spider chrysanthemum, planted
them in the garden and viola! Beautiful fall mums!

Highly recommended!

The Hawke