Soil question

[vandamn58]

Hi
New to site today. Have question about soil medium I am using. It is a pro mix that is 75-85 Canadian sphagnum peat moss with perlite and dolomite limestone. My grow results are quite poor for 2 month growth. Not sure if medium is problem or other issue. Using 2x4 tent with mars hydro sp-250 led light. Growing in smart pots. Initially was over watering but think have that part figured out. Feed water is ph 6.1
Thanks for any help in the right direction.

 

[oldsmokey]

What nutrients are you feeding?

 

[oldsmokey]

Sorry to be so rude and not give you a proper welcome.to

 

[vandamn58]

No added nutrients yet. Checked runoff last week and it was 1300 ppm. Is this an indication of enough nutrients in existing soil? Thanks for response.

 

[oldsmokey]

If your using promix HP it is considered a soilless medium it has no nutrients at all. You are starving your plant. Get some nutrients made for growing marijuana you have to feed every time you water.

 

[Fuzzy Duck]

No added nutrients yet. Checked runoff last week and it was 1300 ppm. Is this an indication of enough nutrients in existing soil? Thanks for response.

I do believe you have hit the nail on the head, ya should really be feeding them on a weekly basis.

By the looks of things they are showing classic signs of all 3 macro nutrient defs NPK.


Other things which may slow growth down is air flow & distance the light is away from canopy of the plant a little technical term called depreciation of light over distance.

 

[vandamn58]

Thanks for info makes sense. I have a advanced nutrients 3 part kit : micro, grow and bloom. Will add to next watering. Do I use all 3 ? Use the bloom during flowering?

 

[oldsmokey]

Go to advanced nutrients website then find there nutrient calculator. Select the appropriate info in the drop down boxes. Below you will see a feed schedule. Mix the the three base nutes as listed and feed that every time you feed. The other nutes in the schedule are additives you can add later if you want.