Controlled release fertilizer (10-10-10) is recommended in spring. Grows best in partial shade (morning sun, afternoon shade). Grows best in well-drained soil with good organic matter; prefers slightly acidic soil; avoid heavy clay with poor drainage. Soil with ph level of about 5.2-5.5 will produce blue flowers, soil with pH level of about 6.0-6.2 will produce pink flowers. Check soil weekly for moisture. Water thoroughly when dry. Remove all dead wood in early spring. Prune and remove old flower heads to tidy up plant or leave on plant to create winter interest. Winter mulch around base of plant may be beneficial in northern areas.