
Knock Out roses are less prone to disease and flower all summer if given adequate care. Normally the soil is amended with peat and/or compost to have soil that retains moisture. Roses like lots of bright sunshine, water and long-acting fertilizer. For best bloom, it needs at least 6 hours each day of direct sunlight and 1-2 inches of water weekly. Don't just water the base of the shrub; many of the tiny feeder/water roots are on the edge of the bush and past that. Put down 3 inches of mulch to keep roots cool and moist. Do not let the mulch touch the plant base. If you are growing in containers, here is a helpful article: https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-planted-containers.htm