Quote Originally Posted by Rusty Trichome
Runoff ph indicates the interraction between soil ph and water ph, and yes...it is an invaluable indicator. Nutrient uptake is limited on the outside edges of our ph. Lockouts will occur.
What Rusty is trying to say is shown in this handy PH nute uptake chart from the charts and graphs section of the problems section of the growing section. Glad you're back on track.
Ocotillo Reviewed by Ocotillo on . Soil runoff @ pH 5.0!? How did this happen so fast? OK, well I found out what the cause of my problems were. I posted about some curling/canoeing leaves and some brown/rust spots I was starting to see on a few plants. I decided to flush and the initial runoff was pH 5.0! I was using distilled water to flush (pH 8.0) and then switched to pH'd tap water (pH 7.1). Anyway, I flushed the 5 gal container with about 4-5 gal. I ran out of time in the light cycle or I would've flushed more. But I only got the pH of the soil runoff up to about 5.4 Rating: 5