Most garden veggies can have two plant/harvest periods in the Northwest. That is depending on your altitude, temperature and soil composition. The growing conditions vary from the mild Willamette Valley to the High Eastern Desert so adjustments are needed depending upon the seeds and starts.
Seeds generally take anywhere from 60 to 90 days (with some being even longer) to mature and bear fruits. Your harvest deadline can be adjusted some by planting early or later and accommodating the weather with heat and frost protections and fertilizer. You can also stagger your planting of your favorites to have an early summer and an early autumn harvest.
For very early starting, you can begin indoors 6 to 8 weeks before the last frost is expected and then transfer your plants outside or to a greenhouse when the weather permits.
Below are some typical garden favorites and some recommendations on planting.