So Im growing autos in Fox Farms Ocean soil. I have a soil Ph meter in each planter. That meter reads around 6.5 for soil Ph after todays feed. Today is week 5 and I gave a small nut feed 1/4 dose and the run off is 5-7-5.9 ph. So am I ok or need to flush? confused.........................The plants looks good...BTW this is my first grow!
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i found personally that if i keep my PH from 5.8 to 6.5 -- this seems to be the best range for them to grow, for 2 grows i did not have and PH solution and still had good turn outs but things were very slow - from a basic standard of 16 to 18 weeks now jumped up to 26 to about 30 weeks.
nor did i even have any kind of a flush solution so i used Molasses for the flush as it was about the best thing i could use until i got my actual flush product, ( the water here is about 7.3 to 7.5 on the PH so i will add depending on what week on nutrients 2 teaspoons of PH up then add the three main Fox Farm Nutrients = Big Bloom - Grow Big - and Tiger Bloom this will now bring my PH to about 6.1 to about 6.4 .
try taking readings of just the tap water - then with one nutrient to see what range is now then do same for the other nutrients as you add them to the feeding cycle - this will help on UP or DOWN with your PH - but most likely you will have to add PH UP to get to your range.
with a reading of 7.3 on tap water then add the nutrients ( all three ) this will bring down to about a 4.4 reading -- this is how i ran out on the small 8 oz bottle of PH UP so fast when i thought there would not be that much change in the balance - was i wrong, but i did learn something new about keeping a a good balance range from 5.8 to 6.5
wish you the best Growers Luv and Peace