how to lower ph i have 7.5-8 soil grow, please help!
- Thread starter jimmyrun
- Start date
MajorCoco
Well-Known Member
How did you measure the pH? Verm and perlite are supposed to be neutral, so with only a 1/3 of your medium your pH sounds surprisingly high. What soil is it?
Apart from changing your soil, the easy way is just to run a lot of slightly acidic water through to try and flush out some lime, or other carbonates in the soil which might get be raising the pH.
Best way is to use a lot of pH 7 water to flush the pots then measure the last bit of runoff for a pH comparison. Don't use soil testers, as they aren't reliable.
scroglodyte
Well-Known Member
add some elemental sulfur. work it into soil and then water in.
420mon
Well-Known Member
Most natural way would to add a little lemon juice until you reach the ph you desire...
aseboy101
Active Member
what he ^^^ said
thanks for all the help guys, think im going to flush them with some slightly acidic distilled water then recheck the ph and hopefully will get it down, dont want to use vinegar or lemon juice as they are only 1 week old and dont want to risk harming them.
scroglodyte
Well-Known Member
water won't change the ph of soil. neither will vinegar or lemon juice. sulfur..............
ok, how much should i use? and i cant mix it in as the plans are already in? will it disolve in water? thanks!
Jack Harer
Well-Known Member
TOPP DRESS IT IN BABY STEPS. NO WAY TO ESTIMATE HOW MUCH TO ADD EACH TIME, VARIES WITH POT SIZE aREYOU (GD CAP LOCK!!) Are you sure theiol pH is that high/ or are you mesuring run-off/
the probe meter says 7.5-8...how would measuring run off be different? do you think disolving this in water would work http://www.ebay.co.uk/itm/500-grms-sulphur-sulfur-powder-high-purity-/280881878977?pt=UK_BOI_Medical_Lab_Equipment_Lab_Supplies_ET&hash=item4165dd57c1#ht_500wt_1287 and then watering them?
Izoc666
Well-Known Member
Next time , buy the LIME like Espoma s Garden Lime to buffer pH so you can pre mix with soil before you plant and you dont have to worry about pH anymore and soil tend to re correct in their medium.
If you fix, it can get worse. IMHO leave medium alone, they will be fine in a few weeks.
7.5-8 pH is fine for my plants, no problem.
Happy growing and peace.
If you fix, it can get worse. IMHO leave medium alone, they will be fine in a few weeks.
7.5-8 pH is fine for my plants, no problem.
Happy growing and peace.
so just bought some "chempak sulphar plant fert. trace elements" you recommend just sprinkling it on top before watering or try dissolve it in water then water the plants? carried out 3 different tests it def to alkaline, how would the run off test be different to soil test? thanks[h=1][/h]