Experience with Hydrated Lime?

nitroboi

Member
Does have anyone have experience with Hydrated Lime to QUICKLY raise PH?

I have a 5 gal pot and have been having pH issues for weeks. She clearly has CAL-MAG def, and some other stuff going on. The girl is set to be harvested in probably 3 weeks. I had pH 5.8 runoff a few weeks back, flushed with 6.8 water, twice. Yesterday runoff was 5.7. I don't have time for dolomite. What's the point of top dressing with powdered dolomite if im chopping her in 3 weeks - as far as I understand, dolomite takes at least that long to stabilize pH? I understand its more potent and is harder to work with. I just need to know how much. 1/2 tsp, 1 tsp for gallon? I placed an online order for some at Ace Hardware but the pics/product description dont have any information on application rates.
 

simpleleaf

Well-Known Member
I use food-grade hydrated lime in my fertlizer formulas. The values run from 1.5 to 3.8% of the dry salts total weight. I'm thinking of switching to potassium hydroxide, which I've read has 8 times more alkalizing power. The dissolved lime seems to layer itself on the bottom of the gallon jugs I use, I always have to shake it before using.
 

fskitch

Well-Known Member
Calcium hydroxide (slaked lime)has to stay in motion at a certain velocity to remain in suspension. It’ll blind you and burn your skin. Careful. Worked with it for 27 years. Nasty stuff. It will raise pH and add calcium.
 

GroBud

Well-Known Member
If you have low ph and cal/mag issues just add dolomite lime and give cal/mag foliar feedings until the dolomite lime breaks down. Dolomite lime raises soil ph and is cal/mag nutrient.

Cal/mag isn't really available in ph that low raise your ph it'll probably start looking better.
 

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