Check the soil's pH level using a garden testing kit. Kits are readily available online and in local nurseries. Yerba buena grows best in soil with pH levels ranging from 6.0 to 8.0. Dolomitic lime can be used to raise pH levels, but should be applied two to three month before planting anything. Mix 1/4 lb. in every 10 square feet of garden soil, mixing into the top six to eight inches of soil. Lowering pH levels is difficult; if your soil has a pH level higher than 8.0, it may be best to plant yerba buena in a container with potting soil.
Select a planting site with well-drained soil. Unlike many other herbs, which require full sunlight to thrive, yerba buena grows well in areas that receive full to partial shade. If you plant it in an area with full sun, it needs to be watered more frequently and is not as attractive as when grown in the shade. This herb is ideal for growing under other shrubs and trees.
Dig a hole that is twice as wide, and equally deep, as the container in which the Yerba buena seedling was purchased. Place the plant in the hole; fill halfway with soil and water thoroughly to remove air pockets. Once the water has soaked into the ground, fill the remainder of the hole with the soil mixture. Tamp the soil lightly around the base of the plant and water thoroughly, soaking the ground.
Water yerba buena weekly. Yerba buena grows naturally in areas of the Pacific Northwest, where rainfall totals can reach 70 inches. Plants can also thrive with as little as 15 inches of water per growing season. Ideally, Yerba buena should receive an average of 1 inch weekly during the growing season.