Can you help me identify deficiency/problem?

[Pang]

Hi,
Can u guys help me? It appears on new growth. I’m growing in a soil. Using Biobizz fertilisers, biogrow and algamic + Calmag from advanced nutrients because I’m growing under a LED and using RO water so they want that Calmag so much. Right now I’m in week 3 of vegetative stage. I would say it’s zinc deficiency or PH problem. Or maybe it’s problem when I use Calmag with bio fertilisers?Thanks for any reply.

[99PerCent]

The yellowing has begun on the newer growth, and includes the very newest growth.

It would appear there is a fair amount of fertilizer and I am guessing you may be looking at nutrient burn. You are in soil?

A few questions.

What is your relative humidity, temp under the lights. What kind of lights? Do you have an accurate pH meter?

If you are in soil try to get the soil to around 6.7 or 6.8. I would water with pH corrected water only at first and see how it responds.

If you are in Hydroponic, you will need help from someone who works with those systems.

Best of luck and welcome to OG @Pang

99

[anon86068642]

It almost resembles a zinc deficiency according to the chart here. New growth affected too.

Plant Abuse Chart and Photos by Nietzsche

Contributed by: Nietzsche PLANT ABUSE Heat Stress : Look closely below, and you'll see the brown leaf edges that are indicative of heat stress. This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants, either by moving the lamps or moving the plants. [image] Figure 1 Nutrient Solution Burn: There's a good chance that this leaf was subjected to nutr…

This one here days it’s iron deficiency.

Nutrient Profiles and Deficiencies by Mr. HIGHway

Contributed by: Mr. HIGHway Submitted: 12-25-2002 Images archived: 2002 These photographs were taken from Cannabis World through an exhaustive search of the Archives. I would like the take the time to thank every member at Cannabis World for their contributions who made this all possible. I hope it helps as many people as possible. I will start with the mobile elements, or the ?Main nutrients? of Nitrogen, Potassium, and Phosphorous. Next will be Magnesium, Sulphur, Calcium, and Iron…

Can we get someone else to chime in who knows better?

[anon86068642]

@Pang
MynameStitch's Guide to Plant Diseases and Nutrient Deficiencies: magnesium

It’s looking spot on to your plant there

[Pang]

Thanks all of u guys. I have LED lights, COB 190W. I will calibrate my PH meter, I think it will be high PH and zinc lockout. Just in a case I will raise my lamp and spray them with liquid seaweed.

[anon86068642]

Keep on growing. If it’s going to progress any further it’ll show what it is for sure. After seeing the pics for a magnesium deficiency it looks exactly like yours almost.

Check the pH of the soil, test your water temperature, and for good measure make sure the pH of the water going in is within the 6-7 window to ensure that nothing gets locked out even temporarily before the microbes buffer it to normal if you’re using any chelated nutrients or anything that makes them absorb easier for the plants.

My water going in I think was a little too cold and I saw a deficiency show up immediately like a rash. It’s very slowly fading, but makes me wonder mostly why it’s fading. Not that I’m complaining LoL

Don’t be discouraged if you see some off growth. Do the math and find the solution. Don’t add anything to fix it unless you’re 100% sure that will fix it.

[Skiball]

I’m guessing iron and prob caused by ph or drainage issue.

[Tinytuttle]

@Pang

Just in a case I will raise my lamp and spray them with liquid seaweed.

Make sure it’s at lights out don’t want to burn the plants with water droplet on the leaves