Some deficiency, but what is it?

TalonToker

Well-Known Member
The soil I had been using for just over 5 years is no longer available, so I recently had to switch. Right now I am using Fox Farm Ocean Forrest, and ever since making the change to this soil I see this on every plant I grow. I am not inexperienced at growing, so I know I am properly watering. This plant is about 10 days old, growing under a 400w hps. Anyone have any ideas of what this deficiency is?

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Jimmy Sparkle

Well-Known Member
To me and my unaided eye it looks as though maybe you got a little water or on the leafs and the light crisped it up just a little causing some yellowing also. I have done this to my plants enough to know . for me anyway.
 

hells canyon genetics

Well-Known Member
Boron Deficiency
Problem: A boron deficiency in cannabis is relatively rare, and is usually accompanied by other types of nutrient or pH problems.

The first signs of a cannabis boron deficiency is abnormal or thick growth tips along with brown spotting on new leaves.



With a boron deficiency, upper cannabis leaves display abnormal and/or slowed growth. Growing tips may not grow properly, may display twisted growth, and may die off. New leaves may wrinkle or curl.

Plant roots can also be affected by a boron deficiency, showing unhealthy or slow growth. Stems may become rough or hollow.

A plant with a boron deficiency may look like it has a calcium deficiency because boron is needed for the plant to properly use calcium. New growth is affected the most, and may look like it's been burnt or scorched.

A boron deficiency is often accompanied by an apparent potassium or nitrogendeficiency, as these nutrients are needed for the plant to use boron. Boron deficiencies are more likely to appear when a plant is underwatered or experiencing very low humidity (very dry air).



Solution for Boron Deficiency in Cannabis

Note: Sometimes a cannabis boron deficiency (like all deficiencies) can be triggered by stressful conditions and may clear up on its own after the period of stress is over.

1.) Use Good Sources of Nutrients

Most cannabis growers don't need to add more nutrient. In fact, most growers have actually already given plenty of boron to their cannabis plants, whether they meant to or not. If you're using quality soil or cannabis-friendly nutrients, you probably don't need to worry about adding more boron. Boron deficiencies are generally more likely to appear when a grower is using heavily filtered or reverse osmisis (RO) water to feed plants, since boron is found in most tap water, but that's actually not the most common reason growers see boron deficiencies in their cannabis plants! As long as you're giving your plants a good source of nutrients, you probably need to...

2.) Adjust pH to Correct Range

But the reason most growers see boron deficiencies is because boron is best absorbed at lower pH ranges. When the pH gets too high, your plant may exhibit signs of a boron deficiency even if it's physically there near the roots.

Learn how to manage your pH when growing cannabis.

In soil, boron is best absorbed by the roots in the 6.0 - 6.5 pH range (in soil, it's generally recommended to keep the pH between 6.0 - 7.0, but boron specifically tends to be best absorbed below 6.5).

In hydro, boron is best absorbed by the roots in the 5.5 - 6.2 pH range (in hydro, it's generally recommended to keep the pH between 5.5 - 6.5, but boron specifically tends to be best absorbed below 6.2).

3.) Give Enough Moisture

Boron is not absorbed well if there isn't enough moisture, for example if plant isunderwatered or humidity is very low (below 25% relative humidity in the air).Proper watering practices will help prevent underwatering, and a humidifier may be needed to achieve the best growth if your grow room is very dry.

4.) Watch for Recovery

If you suspect your growing cannabis plant has a boron deficiency, flush your system with clean, pH'd water that contains a regular dose of cannabis-friendly nutrients. Old damaged growth will likely not recover. Watch plant over next few days to make sure that the problem stops spreading to new growth.

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hells canyon genetics

Well-Known Member
This is the best guess with the info and pics provided
The other thing it could be is the over watering it is real common with fox farms but you said your good there just trying to give you as mich info as possible
 

TalonToker

Well-Known Member
Thank you for the info. Yeah, I am confident in my watering, but as I mentioned I switched to the FF soil about 6 months ago and have seen this on every plant I've grown since that time. After reading your post, I do believe you are correct in thinking boron. I do have some fert that has boron in it, but I haven't used it at all. I will give it some of that and see what happens.

Again, thank you
 

AimAim

Well-Known Member
Personally I think it has nutrient burn of some type.

FFOF is not as highly "calibrated" as they would like us to believe, and I have experienced some hot sacks. And what you are showing here is what I have evperienced.

When you up-pot next time, assuming you will shortly in next couple weeks, cut the FFOF about 50/50 with simple peat potting medium. Add a dose of pearlite as well.
 

TalonToker

Well-Known Member
The mix I'm using is about 30% perlite with a dash of bone meal. Since switching to the FF soil I have had plants grow great for nearly 2 months and then had the leaves get all funny like that. Today was watering/feeding day, so I gave the plant shown (and several others I have going) some fert with boron in it, and we shall see how it goes. If boron is the issue, then I shall know very soon. I will post more pics of that plant in a week or two to update things.
 

Jimdamick

Well-Known Member
I give AimAim's answer a thumbs up. First off, growing in soil there is no way that a plant can be deficient in anything at 10 days. it is impossible.
So, what's left is as mentioned previously is some hot soil. You can probably bet on it. Repot by mixing some standard potting with that Fox Farm dung, and you will be fine.
 

ShLUbY

Well-Known Member
Mag will start in the oldest leaves first, leaving a yellow leaf with green veins (2nd pic post probably Mg). Boron will show in the newest growth and i will say that looks a bit like B def. in the first post... I will also say i've seen pics where salt build up is the cause of wrinkling and "shelving" they called it.

in the first plants, if those are seedlings.... you dont need to feed them anything for the first bit of their lives... the FFOF should be enough to take care of them for a couple weeks.
 

Dr. Who

Well-Known Member
The outdoor plant has early Mg def

View attachment 3478691 what r the white lines IV never seen it before
Like Hells said above.

Yield size effected? Yes if you let it get worse and not treat it...

Water with 1 Tbl of epsom per 1 gallon of water. If you need more water to water the plant....Water with plain water first and then the gallon of supplemented water to finish.....

Doc
 

*BUDS

Well-Known Member
You did not adjust the feeding or ph with the new soil. Now the plants are burnt. Get the old soil back or make adjustments to use the new hotter soil.
 

thegreensurfer

Well-Known Member
You don't have boron deficiency, especially that young. It's likely the soil being too hot for its size. I like to shake a bit of the old soil + mycorrhizae into the hole you dig in the new soil when transplanting to reduce shock and fluctuations.
 
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