# What Type of Fetililzer Is Best for Knock Out Roses?
The knockout rose is a variety known as shrub roses. These roses--a favorite among gardeners--grow in beautiful clusters. An easy flowering shrub for novice gardeners, knockout roses are very hardy and are prolific bloomers.
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Go Organic
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Organic fertilizers offer shrub roses steady, consistent feeding, whereas the less preferable synthetic fertilizers may feed inconsistently, leaving the rose stems weak.
Testing
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Request a soil-test kit from the local county extension office. Have the soil tested to provide an in-depth analysis to be used for selecting the perfect fertilizer.
Ph Levels
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Knockout roses thrive in a pH level of 5.5 to 7.0.
Correcting Ph
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Soil that tests with a pH level of 7.5 or higher will need added sulfur, while soil that tests below this pH level will need a fertilizer higher in lime.
Application
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The texture of the soil will help determine the frequency of fertilizer application. Fast-draining soils will require more frequent applications due to nutrient runoff.
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