is this ph imbalance

[kushleaf]

Not sure if this is a ph deffiencey or heat/light stress

 

[Muddy]

Hard to say without more information.

What soil are you using?

What are you feeding and how often?

What is the pH of your feeds?

What is the pH of your run off?

What is your temperature and relative humidity, measured at the canopy top?

Also, some pictures of the whole plant, taken in natural light, would be very helpful.

 

[kushleaf]

This plant is in cheap compost my other two plants are in biobizz allmix they are 25 days old havent started feed on the 2 that are in allmix but showing slight signs of the same symptoms i have fed the plant in cheap soil twice started feed at 1ml per litre using bipbizz grow the cotyledons had yellowed so i started feed i havent any thing to measure ph but i suspect its the water as its from a well oh and they were in a small poltunell and canopy would have been very hot as it was closed so i suspect it my water or it was just heat?

 

[kushleaf]

Pics

 

[kushleaf]

Can anybody help diagnose this problem i really think its ph but want some info before i buy a ph tester the only other thjng as i said is heat from greenhouse or now thinkinv that it could be spillage on leaves and the sun has magnified it through the leaves please can anyone help

 

[ThaGreenBandit]

Can anybody help diagnose this problem i really think its ph but want some info before i buy a ph tester the only other thjng as i said is heat from greenhouse or now thinkinv that it could be spillage on leaves and the sun has magnified it through the leaves please can anyone help

I'm a newb myself, but I can tell you this: without a PH tester, you may be in for some rough times. A lot of people on here use both a soil PH tester and a water PH tester. The CWP Accurate 8 soil PH & Moisture Tester came highly recommended. Also, check out http://www.growweedeasy.com/marijuana-symptoms-pictures it may prove helpful

 

[Muddy]

Without knowing the pH of your feeds and run off we're only guessing. More times than not it's a pH issue, which is why we always start there. Eliminate the obvious first. If it's only the lower leaves they could have been touching the soil, which can cause that. That's why I asked for pictures of the whole plant, so we can see what the rest of the plant looks like, if it's healthy or not.

 

[kushleaf]

Without knowing the pH of your feeds and run off we're only guessing. More times than not it's a pH issue, which is why we always start there. Eliminate the obvious first. If it's only the lower leaves they could have been touching the soil, which can cause that. That's why I asked for pictures of the whole plant, so we can see what the rest of the plant looks like, if it's healthy or not.

Ok heres full pics..i have ordered a water ph tester

 

[Muddy]

That looks like it could be both cal/mag and phosphorus deficiencies. When both happen at the same time, and this early in the grow, it's a good bet that it's pH related. Once you get your pH tester we'll know for sure.

 

[kushleaf]

Id say it has to be because my other 2 in biobizz all mix preferted are starting to show same signs + it water from a well and ots not letting the nutes do their job yeah 99% its ph