With full sun to partial shade these shrubs can grow up to 12' tall and wide.  Cranberry has tart, acidic fruit that is best served in jellies, jams, sauces and relishes.  The more hours of direct sunlight the more berries will be produced.  Cranberries tolerate poorly drained soil, but live longest in soil that is moist but well drained.  They don’t compete well with grass and weeds. maintaining a weed-free bed until the plant is a couple of years old would be very beneficial. After two or more years, the shrub will be large and dense enough to shade out most weeds itself.  Water weekly in the absence of rain during the first year.  After the first year, you only need to water during prolonged dry spells.  Cranberries grow and produce just fine without pruning, but they grow quite large. You can keep them smaller by pruning in spring after the flowers fade.  Or you can prune a little at the tips of the stems to keep the shrub looking neat but keep it's large size.