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Sierrablen Plus a game changer at Castleknock. John Jennings, Course Superintendent at Castleknock Golf Club in Dublin, always used to struggle with achieving longevity from the fertilizers he was using – that was until he applied ICL’s Sierrablen Plus Stress Control 15-5-22 +2MgO. Located in the leafy suburbs of Dublin, Castleknock Golf Club is one […]