Questions about seeds

Questions about seeds

I recently stopped into K-Mart and all of their Martha Steart seeds were on sale. They had a ton of perennial seeds! Great stuff: lavender, veronica, delphinium, etc. I bout about 30 packets of seeds. So here is the thing: the directions on the package ar written with the assumption that they would be planted in the Spring. My mother said they can be sown directly in the Fall (I'm in Zone 5, W, NY state/Lake Erie region, heavy clay soil and erratic temps) but don't know if I want to risk that, or is that better? Anyone have any good links on seeding perennial? Experience to share? Thanks in advance!!
At my terrace…

At my terrace…

mexi-sun bloomage

mexi-sun bloomage

Anyone know what this flower is???

Anyone know what this flower is???

Need Plant ID

Need Plant ID

Plant ID and a Thanks

Plant ID and a Thanks

The strange year continues.

The strange year continues.