Calcium or beginning of phosphorus
- Thread starter Jsnbaxter
- Start date
Rurumo
Well-Known Member
Give us some more details, indoors/out, type of soil, pot size,feeding/watering practices, etc. They look a bit overfed to me, the way they're curling under, could be nutrient lockout, could be PH. I say PH because Fish fertilizer is extremely acidic from all the added phosphoric acid that's used as a preservative, and I've crashed my PH with it in pots indoors. I use it outside on a ton of plants with no issue though, the "real" outdoor soil buffers it. Give us more details and I'll try to help. Also, a picture of the whole plant would help a lot.
1 gallon pot, fox farms soil, water when completely dry. Pot is pretty dry at the moment
10/23 - 1.993 3.77 wet quarter strength Neptune fish seaweed 12 drops 4 cups
silica and cal mag
10/29- 2.3. 12 drops root stimulator 4 cups 1/2 strength fish seaweed full strength cal mag 4.475 wet
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Rurumo
Well-Known Member
I would repot that into a larger pot ASAP, that should fix your problems. It's easy to overwater when you first transplant to a much larger pot, so be sure to give it time to "feel light" when you lift the pot. Your plant looks pretty decent, you can definitely turn it around and get it thriving again in a bigger pot.
thank you. I was trying to get the root system developed enough for a 3 day water before repot. It’s still taking about 7 days to dry out. No perlite in it. It’s been stunted for a while. Will the roots not grow enough to a 3 day water schedule before I repot it? I’ve had issues with undeveloped roots. I do complete watering though when I water plants. When I would do light watering the roots wouldn’t get all wet and it would confuse the heck out of me. Are you saying I should do thorough watering?
hotrodharley
Well-Known Member
Beginning phosphorus deficiency
Are you positive? It looks like calcium to me. How do you differentiate. These little specs are continuing to spread
hotrodharley
Well-Known Member
Overall coloration and symptoms. If you have given cal mag and the condition is worsening you should consider phosphorus deficiency. Check Google. It’s your friend
Oh ok ty. Yeah I did that but I never see any photos with super small spots like this. I thought cal mag were larger random spots and phosphorus was more of bronzing toward the middle of the leaf. I actually went through 40+ pages on this to try to learn them all and see if I could any looking exactly like this.
hotrodharley
Well-Known Member
Calcium deficiency deficiency will appear in the younger leaves.
Ok ty. I think I waited too long to transplant as well. My last watering was pretty heavy nutes
10/29- 2.3. 12 drops root stimulator 4 cups 1/2 strength fish seaweed full strength cal mag 4.475 wet
I’m not sure why it would have a phosphorus deficiency specifically. This was a super healthy plant too. White widow. Can cal mag lock out phosphorus?
hotrodharley
Well-Known Member
Calcium is probably the biggest cause of lockout. Because of how it is used in general. Any nutrient in excess can cause lockout of other nutrients.
hotrodharley
Well-Known Member
You can see how excess calcium can block 7 other nutrients and micronutrients. No other element can block that many.
speedwell68
Well-Known Member
This is why I don't understand the fascination people seem to have with giving CalMag. I mix my own CalMag, as I am not paying for the "mostly water" of commercial CalMag products. Based on my water company's own test results and my own tests, I have zero calcium or magnesium in my local water. I often got Ca deficiency.
So I give calmag when they start off as seedlings. Then they get a small dose every other week until a couple of weeks before harvest. My CalMag mix is a tablespoon of Calcium Chloride and a teaspoon of Epsom salt in 5L of their normal feed.
When I first started using it, I was giving it every other feed and was getting other deficiencies. It wasn't until I understood the relationship between Calcium and the other elements the plant needs did I get some stability. Yet people seem to blindly give CalMag.
weedstoner420
Well-Known Member
Second the suggestion to pot up, and ease up on the calmag. If you're using half or quarter strength everything else, no sense going heavy on that one thing
BongerChonger
Well-Known Member
I would transplant too as @Rurumo suggested.
Those bottom leaves are obviously nitrogen deficient. Not from a lack of nutrient, but a lack of pot space. It's cannibalizing those bottom leaves to compensate. Difficult to keep up with. Lots of tail chasing and watering to try keeping it healthy. They always want to grow very tall too, with minimal lateral growth.
Watch the Nitrogen content in your fertilizer. Full dose calmag and 1/2 dose seaweed sounds like a lot. Some of the leaves look very dark in places and there's some claw too.
Be careful using fish emulsion as a soil drench as @Rurumo stated as well. I've crashed my soil pH doing this too. Fish emulsion is better suited to foliar application.
Also if you're using tap water + soil, you mightn't need calmag at all, or very little. If any secondary nutrient looks visually deficient, it's magnesium imo. (General interveinal yellowing working from the oldest bottom fan leaves, to the top)
A small amount of Epsom salt to your water, instead of calmag maybe plenty sufficient.
My go to would be transplant to fresh soil and larger pot asap as suggested. I'd also fluff the soil out with perlite.
Consider your NPK. Lots of N, little K, barely any P as @hotrodharley stated.
A more balance fertilizer would help.
GL
Those bottom leaves are obviously nitrogen deficient. Not from a lack of nutrient, but a lack of pot space. It's cannibalizing those bottom leaves to compensate. Difficult to keep up with. Lots of tail chasing and watering to try keeping it healthy. They always want to grow very tall too, with minimal lateral growth.
Watch the Nitrogen content in your fertilizer. Full dose calmag and 1/2 dose seaweed sounds like a lot. Some of the leaves look very dark in places and there's some claw too.
Be careful using fish emulsion as a soil drench as @Rurumo stated as well. I've crashed my soil pH doing this too. Fish emulsion is better suited to foliar application.
Also if you're using tap water + soil, you mightn't need calmag at all, or very little. If any secondary nutrient looks visually deficient, it's magnesium imo. (General interveinal yellowing working from the oldest bottom fan leaves, to the top)
A small amount of Epsom salt to your water, instead of calmag maybe plenty sufficient.
My go to would be transplant to fresh soil and larger pot asap as suggested. I'd also fluff the soil out with perlite.
Consider your NPK. Lots of N, little K, barely any P as @hotrodharley stated.
A more balance fertilizer would help.
GL
hotrodharley
Well-Known Member
The only time I routinely give actual cal mag is in the first month of flower. Otherwise it’s in the nutrients I use and in the ones I used before. Add the fact I use tap water that tests about 125-145 hardness. I think this cal mag got started years ago when people started to doing hydro using RO water. It was a running reply like ‘“bout a pound” to questions about plant problems. Here on RIU for sure. I think people just assume it’s extremely important to supplement it.
What do you recommend as opposed to fish emulsion?
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BongerChonger
Well-Known Member
So many choices. Find something with a more balanced NPK ratio. Fish emulsion npk ratio isn't too bad for veg imoe, it's just not very suitable as a soil drench. Your calmag supplement is throwing that ratio out too.
Have to remember manganese is a micro nutrient, so deficiency symptoms start from the top. Not the case in yours. Manganese deficiencies are very rare.This site is showing my deficiency is manganese. I have been getting clawing on these no matter what dosage of fish emulsion I use. So I guess that’s wrong nutrient to use, but I was trying to keep it organic. Is the recommendation topping the soil?Nutrient Deficiencies In Marijuana Plants: The Ultimate Guide
Is something not quite right with your weed plants? Read on to know how to identify nutrient deficiencies and how to get them back to health.
Larger pot of fresh soil, you should only need water for at least a week or two. Plenty time to decide on nutrient or fertilizer.
G/L