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Koala Doug · April 21, 2019

I use fresh mix every year (Pro-Mix HP)... mainly to avoid the inevitable salt build-up from water-soluble fertilizers. Also, as was mentioned, the mix becomes denser after a full season of use.

April 21, 2019	#10
Koala Doug Tomatovillian™ Join Date: Dec 2017 Location: Detroit Posts: 688	I use fresh mix every year (Pro-Mix HP)... mainly to avoid the inevitable salt build-up from water-soluble fertilizers. Also, as was mentioned, the mix becomes denser after a full season of use.