Answer: If they are growing in full sunshine and get adequate water, your Knock Out roses should grow vigorously every year. You can encourage healthy new growth by pruning your Knock Out roses back and by feeding with a 20-20-20. Prune in early summer to promote new growth and again in mid-summer to keep the plants bushy and full of leaves and flowers. You can prune them back now, too. Best wishes with your Knock Out roses!
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