Another thing I like about the sweet peas is the leaves don't get black spot. The trellis stays lush and green even when the roses are completely defoliated. Given how my roses are already budding out while the sweet peas are still seedlings I doubt in my zone that the two will bloom at the same time. Of course, I could be wrong so we will just have to wait and see. Frankly if they do bloom simultaneously it won't be a great tragedy. The yellow roses would contrast beautifully with the violet-blue sweet peas. Should only be about 2-3 weeks before we find out. My experience is limited to just one year but in no way can I honestly describe this vine as invasive. Morning Glories - they are invasive. So is mint and English Ivy, but not the sweet peas. My Captain of the Blues didn't reseed from last year. Even if it does, removal of the vines is so easy that my 68 year old mother could do it without any effort. Patrick

Annual sweet pea (Lathyrus odoratus) is the scented one, but the perennial sweet pea (Lathyrus latifolius) does not have much scent as far as what I've heard. I think the perennial one is more invasive also. I've read about soaking the seeds in water, but haven't heard about soaking them in a tea solution...I'll look into that too... Today I found that link I was looking for about making newspaper pots (posted by sewobsessed, thank you!) so I think I'll try that for the sweet pea seeds.

Plant poppies right now. The others, sadly, forget.

I winter sowed these a few years ago, but when I went to plant them, I googled them and decided that they did not belong in my gardens because of their invasiveness. Having said that, you are in a zone 1 and I am in a zone 6, so there's a possibility that it might be more controlled in your zone. It does state on one of the websites that it does not grow in Alaska because of extreme temperatures so that info gives clues to how it might behave for you. I would think that because of it's nature, it would be good to sow at any time, even in your zone.