Soil PH and dolomite lime

[Mr Articulate]

So, here's the deal.

 

My babies are burning (see pic) and I can't figure out why. I have added ZERO nutes to them - only rain water and the soil. It's possible that the heat of the new warm lamp (I recently graduated my babies from the seedling fluoros) may have turned the soil's slow release fertz into fast release and overwhelmed the poor girls.

 

So, I did a PH test and it came out pretty squarely at 7.5 (again, see pic).

 

I gotz me some dolomite lime and am ready to go, but I'm wondering... if all the lime's going to do is stabilise the PH to 7.0, I'm wondering if there's a point to applying it at all? Isn't the ideal PH around 5.0-5.5?

 

Can you please advise me, brethren?

 

 

[El Gato]

wow. That's why I don't use soil. Sorry I can't help. I would inclined to start again if u can.

[Reverend]

As you can see by the chart below you should be aiming for 6.5ph but slight variations will happen.

Slow realise in soil for cannabis is not advisable. You problem is the potting mix.

 

[Mr Articulate]

Thanks, Reverend. I'm going to try the lime and see what happens. But I've already decided that this will be my last grow with soil. Unless I'm growing outdoors, I see little point in using it anymore.