Plant Bartzella Itoh Peony in well-drained soil with full sun to partial shade. Space plants about 3 feet apart. Water regularly, especially during dry spells, but avoid waterlogging. Fertilize in early spring with a balanced fertilizer. Remove spent blooms to encourage more flowers. In fall, cut back foliage to ground level after it dies back. Protect from extreme cold with a light cover if necessary. Divide clumps every 3-4 years in early fall to maintain vigor.