Quote Originally Posted by Zandor
Flushing should be part of everyone’s watering plan. You would have less problems of nutrient lock if you did. Especially of you grow with any hydro system. It will help keep your system clean and plants stress free. You should flush once a month and between cycle changes to maintain healthy plants at least. It’s all about stress free gardening.
Im glad I stumbled upon this thread. Just learned a lot. I haven't flushed once yet. This is my first grow so at first I started using tap water. (I know bad) Then I switched to filtered water and have been using a tdm tester to make sure its good. About halfway through my veg cycle I started feeding my plants nutes. So at about day 39 into flowering, would it be good to do a flush now, or just wait until 2 weeks to harvest. And if now, should I use somthing like Flora Kleen, or only use that before harvest?

Ive got another grow that I started and im just about ready to flower so I will be flushing next time I water!