Peonies grow best in rich, well drained soil, and full sun. When planting and tending to be sure to add plenty of compost and well rotted manure prior to planting and each fall as well. Bulbs should be planted with eyes 1" - 2" deep. Space plants 2 feet and 3 feet apart. Make sure to water in periods of drought and fertilizer a couple of times a year. If the plant grows to thick and bushy trim and thin to improve air circulation. In the fall trim the plant back Cover with mulch To keep the blooms big and plush peonies normally need thinned. The clump of roots can get too thick and may require digging them up and removing some of the roots.