I know it depends on where you live, like which zone, or perhaps even other variables, but is there any kind of rule of thumb that says "ok, time to stop now". Does it have anything to do with last chance of frost?
The winter sow method of starting seeds in milk jugs could be used at any time.
It is most useful for seeds which require chilling, but if winter is past you could chill seeds in moist paper towels in the 'frig.
I have Sweet William which I seeded in milk jugs last July (after our last frost) which are there waiting to go in the ground.
For annuals the limiting factor would be when do you get the first killing frost in the fall.
It depends on the plant that you want to grow.
I've used the method any time of year. i.e. last summer I started several jugs of perennials for fall planting- rudbeckia, delosperma, and penstemon that I remember. Don't remember what else. They were planted out in fall.
So even if you sow jugs in the summer it's still WS? And please, nobody say "it ends when you run out of seeds"... Anyway, thanks for clearing things up! Let's hope nobody asks ME when WS season ends. I'll just tell them to look it up at DG. :)
[quote="stephanietx"]It ends when you get everything in your jugs planted in the ground. :) For me, that means anywhere from April-June.[/quote]
For me that means never, as in I never get everything planted in the ground. What perennials are not in the ground by mid october goes indoors to a cool but sunny pantry where only the strong will survive to see another spring... and another new batch of seedlings.
Thanks all... happy WS this spring, and summer, heck... all year round. :)