Re: How compact should potting mix be and what should be used.
Now I remember also one other reason why I stopped using Sphagnum moss (pure) as potting mix. As Nepnut mentioned in his last sentence, it all depends on your watering habits, if you water often or have no time to water often. etc.
With Sphagnum moss, if I water often, or put a water tray it gets too moist and sometimes even become quite anaerobic... you can smell the stink. So I stopped using it. My style is to use water tray with just shallow water on the tray, coz I don't get to water often. At least that works for me.
If Sphagnum moss is always wet or if you are always watering, you will surely find that it compacts over time.
Another thing, cocopeat... is probably a bit more environmentally friendly or at least more sustainable than sphagnum moss.
TTFN
Arvin
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