Hey so I’m on mt first dwc grow a white widow auto.so when should one stop feeding nutes? My pistils are 25-30%brown
In dwc, you can take your nutrients all the way to your last day if you’d like then let the plant sit in plain RO for the last 24 hours or so (48 hours wouldn’t hurt either), at this point the only additive I would use is something like GH florakleen
General Hydroponics FloraKleen QT - Mineral Salt Clearing Solution
https://www.amazon.com/dp/B001IA1P0A/ref=cm_sw_r_cp_apa_E1TfAbA1KY9V9?tag=greenrel-20
I’ve read where some people still stop giving nutrients like a week out or so…
I’ll do that in soil but not DWC
How do the trichomes look? Brown pistils means look at the trichomes @Gman753
How many days or weeks of flowering are you?
When the pistils are browning it is time to look at the trichomes with a jewelers loupe or magnifier
Here is what to look for
Clear Trichomes are still growing
Milky trichomes are mature
Amber trichomes are past maturity