hi guys this is my 3rd attempt of growing the other 2 trys went nasty wrong with over feeding
so this time i am being really carefull with the nutes
my question is how do i know my girls r happy with the dose i give em? 1 mean what do they grow like without enough?
i am growing 2 kush in nft 3 weeks in to flower i have not took my e.c over 0.6 in fear of over feeding!

Hi Mr Green;

0.6? You need to seriously turn up the noise at 3 weeks in!

To find out how your plant is reacting to your feed regime, read the signs. The plant(s) will tell you all you need to know.

First sure sign is a "pale-ing" (is that a word? ) of the larger, older leaves. As the plant needs more nitrogen to fuel new growth, it "moves" reserves of the mobile element nitrogen, (in the form of chlorophyl - the green stuff), from the older leaves meaning they wash out to yellow first!

Thats kind of how it works anyway.

Keep an eye on them and adjust accordingly.