Yellowing again.

[Weedhound]

Make sure that everything you put into your pot from here on out is ph perfect......even if you can't straighten out the runoff, at least do your best to make sure it goes IN at the proper ph......they'll get some of the nutes anyway.

[stinkyattic]

Lime doesn't work as a soil flushing pH up solution. You need a bottle of pH up. Follow the flushing sticky for instructions.
There IS an acid factory in your soil if you run a soil based upon peat. It has a natural acidity that falls around pH 4.5-5.5.

[Weedhound]

Whats the story with lime and ph up stinkster?

[stinkyattic]

Lime only works properly IN the soil where it's sitting there preventing the acidity in the peat from becoming the dominant factor in soil pH, and feeding calcium to the plants, UNTIL IT IS USED UP. This happens in 4-8 weeks from first wetting, depending on a lot of factors. It is also a weak base, not a strong base, and you need a LOT more to neutralize acid.
pH up is a strong base, that dissociates into the metal ion (sodium, potassium, whatever you are using) plus a free -OH that can combine with the hydronium ions that are your functional acid in the solution, and neutralize them, because H+ + OH- => H2O.
So you use lime to stabilize soil pH preventatively, and pH up to change it when you observe a problem.

[Weedhound]

Thanks.

[stinkyattic]

My pleasure.

[dillhole]

I wish I had read that a few weeks ago. Live and learn, I guess.

I just found a website that sells nutes/additives in smaller, more affordable quantities. I ordered some Cannazyme and pH up. Maybe it'll come in soon enough to be of use.

It's funny, I've read more in the last two months than I have in the last two years. I thought I had this growing thing all figured out. Now I've come to realize that much of what I had read was bs. Now, thanks to fine folks like yourselves, I'm getting a clearer picture of what cannabis plants need.

Thanks again guys! Maybe someday I can repay you :jointsmile: