How far along into flower are you? If you are asking if you should use CalMag Plus the last 10-14 day's before you harvest? The answer is ok up to the last 7 day's then you flush everything. I like FloraKleen to flush my plants with either dirt or Hydro it works well and 8 bucks it's a good price. The last 7-day's before harvest you should only use water or water with a cleaning flush solution.

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Zandor Reviewed by Zandor on . zandor ol pal!!! another cal mag ? hey!! im gonna start feeding my k2 water for the last week today and i was wondering if i shud use cal mag along with the ro water? ive read in some places calcium is one of the only nutrients shell need up2 harvest. wud i b better using calcium nitrate, or will cal mag do? mayb i shudnt be using any? if u can help id realy appreciate it. thanks ever so much peace arthur Rating: 5