Not enough information - Seeds for which perennials. Some will store better and not lose their viability as quickly as others. Do they have a dormancy that needs to be broken, by a cold moist chill, or would they germinate if you direct sowed. Freezer really isn't helpful, although if a cold moist chill is required before they will germinate, your refrigerator (not freezer) will work. But, if they need a few or several weeks of moist cold before being brought back to warmer temps to germinate, you could be looking at late summer or early Fall for seedlings. Then what, where will you keep tender seedlings that haven't had time to grow any kind of root system over winter in a Z5... So again, which perennials, you could ask here and one of us may know, or you can look them up on Clotheirs database to see what temps the seeds may need to germinate and an approximate time frame Here is a link that might be useful: Clothiers

I was wondering how seeds from the candy canes would do. I planted seeds this spring, some blooms were good, others were just orange zinnias. I'll save some seeds & see what happens.

Love that salvia! What a beautiful color I can never think of the name of this stuff. It bloomed heavily in the spring, stopped over summer, then was gorgeous in the fall. I dug it up and I'm going to try to keep it in the house over winter. It still has a few blooms left even now. I took this picture a couple weeks ago: It was also my first year to grow bat-face cuphea. It made a nice mound of bright red and stayed in bloom all summer. It didn't seem to get a lot bigger than it was when I planted it though.

Some seeds stay viable longer than other seeds. If you have enough seeds, you can test them by soaking them in water for a few hours then wrapping then in a damp paper towel. Count the number that germinate after the usual germination time divided by the number of seeds and you will have a current germination rate. You tell germination by seeing a small root develop. And by the way, you can plant those. I routinely do that with direct-seeded plants like corn and beans.