Got some coming tomorrow so I’m in 5 gal fabric pots using two to one froggy soil to ocean forest and I have the dolomite lime powder and the down to earth oyster shell box how many tablespoons of each to topdress with to raise my ph from around ( 5.5 — 5.7 runoff trying to get up to 6 to 6.5
1 Like
That’s a tough question without knowing you soil mix, water source pH, and what you’ve been doing thus far. I’d give it 1/4 cup, to start, with those numbers. Work it into 3-4 handfuls of some EWC or compost. Then top dress that on a pot.
What’s you input pH of starting water?
1 Like
2 to one froggy soil to ocean forest with fox farm nutrient trio line. And ro water ph to 6.5 except last watering was 7.0 to raise oh but didn’t help much
I make sure it’s at. 300 ppm buffered with calmag since the ro water has nothing in it
1 Like
1/4 cup of dolomite lime and 1/4 cup oyster shell flour ? Or 1/4 cup total (mixed)
I have EWC coming with the OSF
I also don’t use dolomitic lime, so hard fur me to direct you on its use. If you insist on its use, add a tsp to the OF you just picked up.
Edit: The OF will start responding quickly with that pH. The acidity will consume.
If you had DTE calcium96, I’d tell you to adjust ph up by adding that to water. If you wanna get to 6.5 range, from where your at, you’d water 7.7 range to fix
1 Like
I’m currently in the process of raising my soil PH.
Used DTE calcium 96 last night to raise my PH in a mix that’s reading between 4.8 and 5.0
This powder is water soluble
Mixed about 45 ml (3 tablespoons) into 1 gallon RO water and used 1 quart watered each into 2 recycled 7 gal pots that were around 5.8-6.0 before planting in them.
The soil mix I used the other 1/2 gallon and I’ll be headed down to check them here in a bit and will share what their PH changed to.
This changes PH pretty fast.
I also used this on 4 - 15 gal pots with plants already in them that had low PH near bottom of around 5.2-5.6
3 Likes
Adding to @Skydiver says…
1 Like
How far along are the plants?
If they are still in veg then you can simply transplant into fresh soil and problem solved and no worries about feeding for a month or so.
1 Like
They sprouted on dec 18 so today would be a little over a month and a half old
2 Likes
And yes there still in veg
1 Like
Sorry my freind, been a crazy few weeks around here for me 
How are things looking now?
If you haven’t stabilized the soil, a transplant into fresh soil could be an easy fix if that’s an option. And hopefully going in at 6.5 from then on with the new soil will keep it in range.
Add a little bit of the lime to the fresh soil before planting in it and it be easier to mix it well. .
I know this is late but i had the opposite problem a month ago in my current grow with my run off being high ph. So i went 0.5 lower than my preference for 3 or 4 water/feeds and it slowly corrected. 19 days into flower now and im satisfied…first tent grow, 3 white widow photos in 2 gal pots.
1 Like
OK guys so update this is where I’m at for the people who have been following this thread and helping me you already know that I’ve had a problem with low pH runoff coming in at 5.5. I ended up doing a top dress with 2 tablespoons of oyster shell, flour and 1 teaspoon of dolomitic lime, while giving pH water at about seven and my pH is in range now but my ppm was really low. It looks like the plant has deficiencies or nutrients burn but I don’t think it would Be that because the ppm was coming out at only 571 and I was giving it ro water ppm to 300 with calmag that’s when I decided to just give it some feed water that’ made my runoff 711 this is my first grow, and I’m expecting mess ups, so I’m really just looking for advice on what you guys think I should do going forward
1 Like
If you need any information on what else I’ve been doing, I can let you know
1 Like
Nice job on correcting the ph 
Notice they new growth looks good and it is older growth that’s kinda fading out more on lower stuff.
This makes me think you are correct in the tds being low and after all the RO water fixing the ph, that’s to be expected.
How long ago was it you gave it the feeding that got runoff over 700?
If you wanted to, you can defoliate some and help increase airflow.
Any leaves that are more brown then green or yellow could be plucked off.
Any yellow can trun back green but any brown can not. Alot of the more brown leaves will probably fall right off soon as you pull just a little bit, wear at a certain point the plants reject leaves as they die off anyways.
But I imagine long as ph is in range and you just balance the runoff number from say 600ppm - 1100ppm, they should be ok.
Shouldn’t take but a few days “2-5” to really notice some of the yellow start to turn green again, if everything is in line
I’ve been out all day so sorry for the late reply, but I gave it a 2 quarts of water a day before this post and that’s when I saw low ppm and that’s when I gave it 1 quart of feed water and the small amount of runoff that I got from that was 711. I corrected it the same day. Honestly that’s some good news to hear. Hopefully that’s the case and the plant doesn’t seem to be getting worse. I was being too cautious at first. With giving it 300 ppm worth of Cal mag
1 Like
Yes Also was thinking of taking some clones in some rapid rooters and defoliating and I’m wanting to flip to flower now is there any steps you guys take when doing your flip to flower ?
1 Like
Not necessary for me, sometimes I defoliate and do a little “lollipoping”, maybe spread branches out some.
Sometimes i just flip and then do the things i said 3weeks after flip (after the streach).
And sometimes I just flip and let it go
1 Like