Green Power 5 in 1 but how?

Flushing is for hydroponics. It doesn't work in soil.

I’m using the same one and I understand it as “stop feeding about one week before harvest”, not literally week 11 for every plant. Not all strains finish at the same time, so a fixed week number wouldn’t make much sense. That said, you’re right — there are studies showing that flushing doesn’t really change nutrient levels in the final product. With an organic fertilizer like the S&R Organics 5-in-1, I usually just let the plant fade naturally and don’t stress too much about flushing hard. Also… great choice 😄 it really does smell like cocoa, doesn’t it? Always makes feeding a bit more enjoyable.

The usual "stop all fertilizers and supplements 10-14 days before the expected harvest day" is what I would recommend. Sticking to a rigid calendar schedule without considering what the plants are actually doing is not ideal.