Open some up to see if the contents have gone bad - maybe they are fine.

I've always used moistened horticultural vermiculite in Glad Mini Round containers. Never had mould with my conifer seeds.

I have stratified over 1000 seeds over the last two years. I have just used damp paper towels with a little damp sand in a zip lock bag. I have found that some seeds are more likely to get moldy than others and some of the mold can be prevented by a thorough cleaning before the stratification process. Maple, some pines and some fir seeds seem more prone to mold from my experience which is limited in time but high in volume.

????

isnt it just part of the process of mother natures degradation of the seed hull ???

i dont know.. i am asking????

just plant the things ... in sterile media ... see link

i also wonder why you are doing this indoors in WA?? ... washington i presume

ken

Here is a link that might be useful: link

What kind of seeds?
I stratify outdoor plants outdoors. Sprinkle on a flat or raised bed and lightly cover with soil or light mulch......and walk away. Spring comes and up come the plants.
I've done this with a lot of different trees and shrubs including rhododendrons and azaleas.
My wife seems to be in charge of the refrigerator. ;-)
Usually when done indoors, mold is not a problem unless it's the dreaded 'damping off' when the seedlings are grown indoors.
. It's warm now. I'd go ahead and plant them outside. No damping off outside when they come up in late Feb. or March.
Mike...with Tulips coming up.

i never thought of damping off as a mold issue ..

but a quick wiki review suggests the causes are mostly fungii .. but there is a mold ... so much for my in depth scientific analysis ... lol ...

but then again.. i suspect OP is guessing that the white stringy stuff is mold ... just an observation on his part.. rather than a sure diagnosis ... of mold vs fungus ...

ken

Thank you for all the helpful suggestions! I actually did end up planting a few outside. The others I was just able to clean and they looked fine. As for the type of seeds I have Alpine Fir, Mt. Hemlock, Atlas Cedar, Stone Pine and Spanish Fir.

As for why I am starting some indoors. Last year I started some in January and it was nice to have little seedlings sitting on my window during the later winter months. I actually already have 1 Stone Pine sprout and it's growing well in my south facing window.

i am glad you tried/use a variety of methods .. i get so frustrated across all the forums by peeps who dump all the seed into one version.. then fail.. and have no seed left ...

let us know how it all works out.. indoors .. and out ..

ken