Just to be safe....your a checking ph of your water and soil runoff right? And those are both normal? Can you transplant to better soil? That would be a better bet than flushing here but if you can't .....go for it cause they don't look very happy right now. (Ps...not overwatering either are you? Just trying to cover all bases...)
Weedhound Reviewed by Weedhound on . OverFert problem! Can MG time release Soil Be Flushed? The thread title says it all. Having Over fert problems, can the mg time released soil be flushed well enough to eliminate this problem? Rating: 5