Food For Thought

[bigroth]

...Apparently I don't have as much of a green thumb with thinner rooted orchids, i.e. oncidium alliance (all in bark). I've been feeding at a quarter-strength biweekly with Grow More 20-10-20 (urea free FWIW). I suspect frying roots... Interestingly, I don't have this issue with miltoniopses (but probably because most of mine are not in bark). Do you always pre water these guys regardless of how much you dilute? If so, how long do you wait?

I generally don't pre water (for a quarter strength feed) when it comes to paphs and phals in bark and they do just fine.