Well, I took some ph/ppm tests and half of my garden read around 5.0ph/900-1000ppm, and the other half read 5.3ph/600-700ppm. The first half didn't get flushed as much as the second did. So last night I flushed them all with ph7.6 water. My res and # of plants only allows for 1 litre of water per plant, so that's all I can do, unless I use tap water that hasn't sit for 24hours... The tests I did today were only a little higher in ph, so I suppose I need to flush one more time with a high ph to try and get them back into a nice range.

The plants are looking hungry (they are pale in the new growth, and have rust spots on the older growth), and I'm worried about this progressing too far if they don't get food for another 4 days (time it will take them to dry out again after this flush). I'm sure there is still food in there, but I'm worried about the ratios after flushing like this... Maybe I'll flush them with a mild dose of calMax, or bloom/veg... I was thinking it would be a good idea to foliar feed them with a weak solution of half bloom and half veg (I'm in transition as of Monday). I am using botanicare pro veg and pro bloom soil. Does this sound like a good idea?

Quote Originally Posted by growbe
Optimum ph in promix is 5.6 to 6.2 You should adjust nutrient solution ph to about 5.8 to 6 after everything is added. This ph seems low but is necessary to make iron, manganese, zinc, copper, boron, and phosphorus available to the plant. At higher ph, these become less avail. to the plant.
Although stinkyattik suggested it, it is not feasible to repot my current grow into new soil now... That would be too much more of a cost. I'm guessing that I will have to feed with a higher ph to allow for the drop that seems to occur... A store owner in my town said to always feed with 6.8.... seems about right, as the ph in my runoff is always in the low 5s after 6.3 went in, for the last 3 or 4 crops. I wish I had used dolomite lime this time, and more of it in the past... I forgot that GH nutes are ph buffered... Botanicare seems to lower the ph in the peat in a MAJOR way.

I don't have a cam to show pics of my leaf fringes that are curled up. By fringes, I'm referring to the sides of the leaves...

As always, I appreciate the advice...
I'm considering switching back to buckets...

peace
organic_sourdiesel Reviewed by organic_sourdiesel on . Why has my Ph droped? I grow in soil, righ now i am in 2 gal. pots. I have 6 plants that are about 25-26 days through veg. I have been using only growbig mixed with rested tap water. I started at 1tsp/gal after 1 week of veg have worked my way up to 2 tsp/gal. My plants look healthy and all, but today when i watered and tested runoff Ph almost all of my 6 plants tested at around a PH of 5.... Why is my Ph droping?? I was thinking possible salt build up, I heard that FoxFarm products tend to create alot of Rating: 5