Double Knock Out Rose
image by H.B. Dean
Since their introduction in 2000, Knock Out Roses have become a favorite among gardeners. Once planted, these disease resistant roses are among the most carefree rose. With the right type of rose food, fertilizing Double Knock Out Roses is a simple task.
Prepare the gardening site for ground the Double Knock Out Rose. Several weeks before planting the rose, incorporate generous amounts of well-rotted compost or manure into the soil.
Spread a 2-inch layer of mulch under the rose year-round. For newly planted roses, cover the bud union (the place where the rose's roots and canes meet) with mulch. When new red leaves emerge, gradually remove the mulch from the bud union.
Fertilize the Double Knock Out Rose in the spring, after pruning. According to Rose Gardening Made Easy, "Sprinkle some time-released rose fertilizer around the plants. That's usually all the rose food they need all season."