Double knockout roses are self-cleaning and bloom every 5 to 6 weeks. Plant them in early spring. You need a soil test kit, lime or sulfur, the rose plants, a shovel, manure or compost, and mulch. More »

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To propagate roses from cuttings, remove stems from an existing plant, dip them in rooting hormone and place them in a potting mix for several weeks. Complete this process in the late summer or early fall. More »

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Prune Knock Out roses by cutting the branches at an angle one-fourth of an inch above an outward-facing bud using a pair of bypass pruning shears, states North Carolina State University Cooperative Extension. Wait until ... More »

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To plant knockout roses, select a sunny location that receives at least six hours of sunlight a day. Dig a large hole, wider than the root ball, and insert the plant. More »

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The best time to prune knockout roses is during late winter or early spring. The branches are easily visible at this time because the plants is dormant. More »

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If Knock Out roses aren't pruned, they don't produce as many flowers or grow as well, according to Gardening Know How. Nonetheless, the NC Cooperative Extension recommends that Knock Out roses shouldn't be pruned for the... More »

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To trim Knock Out roses, prune them during the second season of growth, trim them vigorously in late winter, and then shape the bush during the growing season. Remove dead or diseased wood, and cut away limbs that rub to... More »

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