Find an area in full sun for your herb garden.
Buy seedlings or grow the herbs yourself from seed. Annuals, cilantro, basil, borage and dill are easier and more economical to grow from seed.
Plant big perennial herbs, lovage and horseradish on the north side of the garden so they will not shade smaller plants.
Plant lemon balm, thyme, sage, oregano, parsley, tarragon and chives in front of the big herbs. They are easily grown, prolific perennials needing little care.
Pinch back the new shoots on basil to encourage shorter bushier plants with more leaves. Basil needs lots of heat. In the Pacific Northwest, a greenhouse or cold frame, or the south side of a building, is ideal for growing basil.
Plant mint in a shadier area away from other plants where you won't mind it spreading. Mint is notorious for quickly outgrowing its allotted spot.