Seed Selection Made Very, Very Simple-- I would think Seattle gardening conditions are fairly similar to here so these variety recommendations would be a good starting point Gardens Ideas, Gardens Conditioning, Edible Gardens, Northwest Edible, Gardens Face, Gardens Ed, Edible Life, Seeds Selection, Seattle Gardens
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I usually wait and buy most of my plants in May because I never know when to start my seeds indoors. This handy little chart lets you know when to start seeds indoors as well as when to plant outdoors.
A great chart on Vegetable gardening planting times, from Easy Vegetable Gardening