Outdoor plant in a pot. Will a heavy rain flush my plant ? I have learned my tap water has a ph of 8.0 and this looks like the main problem I’ve been having with my outdoor plant well that and over watering and a few other newbie issues. BUT , I was waiting on some ph adjusters to arrive so I could flush and we had a very heavy rain followed by a few days of off and on light rain. Would this be sufficient to flush my plant or should I go ahead and flush with ph adjusted water ?