Viewing post #1008460 by HoosierHarvester

bxncbx said: . . . I've had delphinium seed sprout that is way older than 2 years. And ageratum seed can remain viable in the ground for many years. I was renting a house and had the backyard aerated. I got a huge stand of ageratum that I never planted that summer! My neighbor told me several years earlier another renter had planted ageratum there. My worst luck is with pansy/viola seeds but I think it might be because I try to germinate them in a room that is too warm.

@bxncbx you're lucky with the delphinium then. I too store the seeds in refrigerator and seldom get germination after 2 years. Same with columbine. I have no idea about ageratum, but that's interesting.