In zone 5 MA, I still have plenty of no shows still. The weather is so crazy I'm not worried about it.
Depending on the kind of cosmos you have sown, depends on when they will germinate. Some kinds take much longer than other cosmos to germinate.
I still have 8 kinds of cosmos that haven't germinated yet and they are the ones who take longer to germinate.

Some of my poppies aren't up yet either and they take longer as well, shasta daisies should start this week and my larkspur will be a bit longer too.

Crazy weather has put my germination about 2 weeks behind what it has been for 3 years.

Don't worry yet about the slow germination.

Fran

I think its too early to worry. I'm in zone 7b and still have sprouts everyday this week. We had a cooler weekend and warming up now. That has spurred some on to sprout. Funny cause DH was asking me to dump them somewhere and I told him I felt it best to hold on until the end of May. I sure am glad I did.

hpny2,
This has been a strange WSing year. Although I have many sprouts, there are somethings I expect them from that I don't have, and some I had doubts about that are really outdoing themselves sproutwise. (ie, Lady's Mantle, Liatris, perennial Asters have all sprouted, but no annual poppies and most of the single, non-wave Petunias just started sprouting only last week. That seems backwards. Kinda like your Lavendar sprouting before the Cosmos).
So I would hold on.
And I've been spoiled by WSing in two of the warmest springs we've had up here. Now it's a normal one (but the 3rd one in which I'm gardening), and I'm trying to figure out what's wrong. The only thing that's wrong is its cool like it usually is in May.

Linda

The only containers where "nobody's home" are ones that had "iffy" seed to begin with. Either really old seed (those poppies seeds I got free from a donation to the Vets 3 years ago maybe?) or complicated seed (2 weeks at 20 degrees, then 3 weeks at 80 degrees, remove to cool spot for growing on..... yes, I'm kidding but some DO seem read like that!) All other seeds have tried their best, at least a few sprouts and I am more than satified! WS is FAB!

Nancy

I have plenty of annual poppy seeds from donations to the newbie seed project...if anyone is still interested in trying them, I can send them. Do not be shy. Just request and send me your addy.

You are so generous Bakemom! But I am all set, thanks. I purchased some other poppies that did come up. They are all planted out (iceland, calif, fluffy ruffles,shirley)but not in bloom yet.The only one I haven't gotten planted yet is called Double Tangerine Gem cause it is not looking to good and I keep trying new things to perk it up - food, more light, less light, etc! I may just palnt it this week and see what happens.

Nancy

I've still got quite a few empty containers - strange year, but I'm not giving up yet. I'm planting things out as they get big enough, and waiting for the rest. I'm disappointed that my hosta haven't sprouted - I planted a LOT of hosta seed (gift from a friend, so I know the seed is good), and so far none of them have sprouted. I'll be setting those containers aside in the shade and giving them more time - they account for something like a dozen unsprouted jugs.

Laurel

I've got about 40 un-germed, and tossed a couple yesterday that I really didn't care if they did germ or not, but glad I hadn't given up yet on the Siberian Iris, which just barely sprouted this weekend. I'll re-use the soil in my container-plantings in a bit.

Disappointment: Poppies. All DSd, but not a one coming up. ~$50 worth of seed down the proverbial toilet, I'm afraid. I'll leave them in there til June or so, but will WS a pile more Zinnias to fill that bed. There's only a pile of weeds growing in there. I'm so down about that cuz I had SOOOOO many gorgeous choices in there...from greens, yellows & purples, pink, salmon, rose, & red (poofies), to Lauren's Grape, Hot pinks, pastels, whites (regular style). I did WS a few Giganteum, and HOSd those a couple weeks ago, and they are doing ok, but the rest are totally MIA. The bed is big- probably 60 x 6 easy, and there's no way that a few giganteum HOSs will be enough in there.
C'est la vie. Although I really would love to try again, I'm not going to make that type of 'investment' again, knowing the odds are probably not good. Maybe I can find some trades next season. :(

Direct Sown poppies have always been a disappointment for me. I know I've mentioned it a million times....but poppies are what drove me to winter sowing. I got tired to losing money on poppy seeds :)

My shirley poppies seem to reseed okay now, but the somniferums are always dicey.

I've been photographing poppies like crazy...

Lisa

Here is a link that might be useful: Lisa's Garden