Yellow spots on leaves

Ok, so I’m a first time grower. I have several very healthy white widows (pic) and several other strains growing but this individual plant seems to not be liking something. I’m using the same water and growth medium - Miracle Grow Potting Mix in all my plants and have some great looking plants well over 1ft tall.
I’ve tried doing as much research as possible and have decided my plant now has terminal cancer… my ph floats around 6.5ish. No notes have been added whatsoever since I’m growing in miracle grow.
Thanks for any feedback.

I’m trying to figure out how to upload a photo…

Thanks for the in depth feedback but after reading it to its entirety, it seems that these fungi mostly attack plants outside. I have a controlled environment that is pretty well maintained. Either way, I’ll take into account the advice and make sure that the all the soil is clean. I’ll re-pot the plant tomorrow and will make sure everything is thoroughly cleaned. I will probably invest in some MJ booster in the near future.

I would look into it deeper because it’s not just an outside thing, Google it because I’m dealing with the same thing inside

From looking into this myself I found this is a big problem in England right now
-good luck

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The best way for us to be sure, and to help you in the future would be to have you fill out a “Support Ticket”. Copy/paste from GrowFAQs.

I was going to ask if you could have dripped solution on them?

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Hey Will,

Are you sure those are the same type posts. You know my sight is bad but, Comp… pictures look more elongated than round. Am I wrong?

lw :slight_smile:

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@Competition59, I’m very sorry I posted ihe wrong info.

Here is the correct info you had asked for. Once again I’m very sorry and I apologize to all the other members who had posted in this thread

This is a long post but I feel I owe this person…!


My pic f your problem

Problems with Nitrogen being locked out by PH troubles.
Waterlogged soil and Soil with low organic matter.

Nitrogen is a very important element in the plant, all of them are but some are more important than others. For soil the best ph to have is 6.8. Why? Because at 6.8, that’s the best number for ALL available nutrients to be absorbed into the plant without any of them being locked out. For hydro and soil less mediums best ph to have is around 5.8.
Try not to keep your plants to cold, because the cold temps will cause the nitrogen harder for the plant to be absorbed.

PH levels for Nitrogen:

Soil levels
Nitrogen gets locked out of soil growing at ph levels of 4.0- 5.5.
Nitrogen is absorbed best in soil at a ph level of 6.0-8.0. ( wouldn’t recommend having a ph of over 7.0 in soil) best range to have nitrogen is a ph of 6-7. Anything out of that range will contribute to a nitrogen def.

Hydro and Soil less Mediums
Nitrogen gets locked out of Hydro, Soil less mediums at the levels of 4.5-5.0.
Nitrogen has the best absorption rate at a ph of 5.5 to 8.0
(Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range to have Nitrogen is: 5.0-7.0. Anything out of that range will contribute to a nitrogen def.

Solution to fixing a Nitrogen deficiency

Avoid excessive ammonium nitrogen, which can interfere with other nutrients. Too much N delays flowering. Plants should be allowed to become N-deficient late in flowering for best flavor.
A goof solid N-P-K ratio will fix any nitrogen deficiency. Any chemical or organic fertilizers that have Nitrogen in them will fix a nitrogen deficiency., Peters all purpose plant food 20-20-20 is good, Miracle grow All purpose plant food, Miracle grow Tomato plant food, (Only mixing at ½ strength when using chemical nutrients, or it will cause nutrient burn!) as well and blood meal! If you need to give your plants a quick solution to nitrogen and you want to use blood meal, I suggest making it into a tea for faster use, where blood meal is slow acting, but when made into a tea it works quicker! Other sources of nitrogen are dried blood, Cotton seed meal which is slow acting, Insect eating bat guano which is fast acting. Bone meal which is a gradual absorption when not made into a tea.( also excellent source of phosphorus). Fish Meal Or Fish Emulsion is a good source of nitrogen and is medium acting. Worm castings, which is gradual absorption. Seabird guano, All purpose Millennia Seabird guano, Orginal Seabird guano All Purpose, Crabshell ,which is slow absorption. Fox Farm Grow Big, which is fast acting. ( can bring down your ph as well)
Here are a list of things that help fix a Nitrogen Deficiency:

Chemical Nutrients

Advanced nutrients Grow (2-1-6)
Vita Grow (4-0-0),
BC Grow(1.2-3.2-6.5)
GH Flora Grow (2-1-6)
GH Maxi grow (10-5-14)
GH floraNova grow (7-4-10),
Dyna gro Grow (7-9-5)

Organic Nutrients

Dr. Hornby’s Iguana Juice Grow (3-1-3)
Advanced Nutrients Mother Earth Grow (1.5-.75-1.5)
Earthjuice Grow (2-1-1),
Pure Blend Pro (3-1.5-4)
Bone Meal(0-10-0)
Blood Meal(12-0-0)
Fish Emulsion (5-1-1)
Seabird Guano (11-13-3)
Crab Shells(2.5-3.0-.5)
Pure Blend Grow (0.4-.01-.5)
Marine Cuisine (10-7-7)
MaxiCrop Seaweed (1-0-3)
Super Tea (5-5-1)
Mexican Bat Guano (10-2-0)
Sea Island Jamaican Bat Guano (1-10-0)
Kelp Meal (1-0-2)
Seaweed Plus Iron
Neptune’s Harvest (2-4-0.5)
Alaska Start-Up(2-1-2)
Bio-Grow (1.8-0.1-6.6)
Age old Grow (12-6-6)
AGE Old Kelp (.30-.25-.15)
Neptune’s Harvest (2-4-1)
Maxicrop Seweed(.1-0-1)
METANATURALS Organic grow (3-3-3)
METANATURALS Organic nitrogen (16-0-0)

So adding anyone of these above should fix up your nitrogen deficiency! Nitrogen deficient plants usually recover in about a week, affected leaves will not recover.

Now if you added to much chemical nutrients and or organics, (which is hard to burn your plants when using organics) you need to flush the soil with plain water. You need to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good enough to get rid of excessive nutrients. Soluble nitrogen (especially nitrate) is the form that’s the most quickly available to the roots, while insoluble N (like urea) first needs to be broken down by microbes in the soil before the roots can absorb it.

Note: Blood Meal, Dried Blood, Guanos, Kelp Meal, Cotton Seed Meal, Peat Moss, Sulfur and fish meal are all acidic and can bring your ph down, so if you add these please monitor your ph when using those.

Note: Bone Meal, Rock Phosphate, Wood Ashes pretty much all ashes, Shellfish Compost and Crab Meal are all alkaline and can make your ph go up, so if you add any of these please monitor your ph.

Here are 3 pics of what a nitrogen def looks like… the first one is a nitrogen deficiency in vegging. the 2nd picture is nitrogen def in flowering; THis is completely normal for mid to late flowering; as you would want your plant to naturally yellow at the end. DO NOT add nitrogen supplement to fix the problem; just let the plant yellow as cannabis does towards the end of flowering. The last picture is one that is caused by TO MUCH Nitrogen.



Thanks for the all the replies.
I have since repotted the plant into a 3-gal and it has grown very nicely! No new growth has any of the spotting. I haven’t changed the grow medium or the watering or anything else. I haven’t used any solutions with any my plants so it’s unlikely something dripped on it. All seems fine for now. Will post an updated pic soon!

And that is a super in depth guide. Thanks for all the info @garrigan62!

The problem I have is none of the product you put up is here in Australia, is blood and bone OK to use

Yes it is


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