Yellowing of leaves on one plant

[Devon11]

this is one of my white widows, plant broke ground two weeks ago. Medium is premier potting mix from canadain tire, light is 1000w led full spectrum. I'm using rodi water. Temp has been a big low at 17 degrees c. Humidity is 50 percent.
I'm using easy tangs feeding guide. So day ten I watered with sensi bloom a and b (1ml to 1L) as well as calci mag. They got another feeding day 12. Went down this morning and saw the yellow leaves. They are also curled up which they weren't before. I dont have a ph test kit. Which is the reason I used sensi bloom. The nutes are supposed to be ph perfect. I want to feed today but not sure if I should use nutes or not. Any help greatly appreciated

 

[rlsachs2003]

I am no expert but possibly over watering by the looks of it. I am sure others will have more knowledge then I do. Ph is a must when growing I would suggest picking up a ph tester. When you watered did the planter feel light and was top few inches dry

 

[Devon11]

I have only watered three times aside from the initial soaking because I was worried about over watering. And I figured with the ph perfect nute line I would be fine since I will have some in my water ever day after day 10

 

[rlsachs2003]

Rodi water can have different ph lvls. Very possible water is to high in ph. Even with using phed nutes not knowing what water is prior doesnt mean after mixing your ph is correct. Did you spill any nutes in the leaves when watering? With a large pot its possible your still over watering for that the plant needs. Especially if your watering entire pot till wet

 

[Devon11]

I wasn't really being careful while watering not to spill anything. So that is a possibility, I'll watch for that in future waterings for sure. And i did an initial soak and then watered about half a litre both times. they are in 3g pots. I'll have to look into getting a ph test kit and some ph up/down.

 

[Waira]

- hmmm, odd symptoms,.. the warping of the leaves is from uneven growth around damaged areas,....not caused by anything spilled on them; the soil, is it a light mix, not rich in amendments? New growth looks good, so that's a positive sign,.... watch and see for now, and meantime find out about this soil, and if you may need to start dilute nutes....
As for that "pH perfect" deal, that applies only to when in solution, with low ppm water; once in the soil/medium, there are several other strongly influencing factors on the actual in-pot pH!