Is this a Calcium problem?

My whole plant is fine except for a few leaves at eh very top of the plant. My plants at week 4 of flower if that helps. I don't know the PH as i never checked i don't really give it any nutes as i believe the soil i'm using (old horse and rabbit manure) is doing the job pretty well. I do have a little bit of BioThrive Bloom left over from last year and i give it a tsp if that in some water once a week.

Yep, looks like it. Get some CaliMagic and add some to your nutes. Make sure you add a little less of your regular nutrients, to offset adding the CalMag.

Also, once you start adding it, look at the new growth to see improvements. The damaged leaves won't repair themselves, so don't go by them.

I recently the same problem, I thought it was a calcium problem but once I went over what I was doing I came to conclusion that my pH was too low. Plant was completely healthy until flower when I started adding nutes. Saw a few spots like this and it quickly spread to whole plant. Didn't affect the sugar leaves so still got good looking buds but I think it lowered my yield.

Takeoff28 said:

I recently the same problem, I thought it was a calcium problem but once I went over what I was doing I came to conclusion that my pH was too low. Plant was completely healthy until flower when I started adding nutes. Saw a few spots like this and it quickly spread to whole plant. Didn't affect the sugar leaves so still got good looking buds but I think it lowered my yield.

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Ya I'm gonna get a PH meter for my next indoor grow or maybe sooner my plant is week 5 of flower so I don't have much longer to go few weeks

JSB99 said:

Yep, looks like it. Get some CaliMagic and add some to your nutes. Make sure you add a little less of your regular nutrients, to offset adding the CalMag.

Also, once you start adding it, look at the new growth to see improvements. The damaged leaves won't repair themselves, so don't go by them.

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Sucks only place In town to get nutes is closed for the long weekend here in Canada besides that only Amazon is my other choice but still wouldn't get her till next week. Oh well sure she will be fine till I get some.

You can even get a GH test kit, with the drops. Super cheap, and pH is absolutely essential for transporting nutrients throughout the plant. And that, can also look like nutrient deficiency.

Takeoff28 said:

I recently the same problem, I thought it was a calcium problem but once I went over what I was doing I came to conclusion that my pH was too low. Plant was completely healthy until flower when I started adding nutes. Saw a few spots like this and it quickly spread to whole plant. Didn't affect the sugar leaves so still got good looking buds but I think it lowered my yield.

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Soil or hydro? ph of what, the water going in, the run-off or the soil?

I second JSB99's suggestion of ph test drops. More reliable than cheap meters and plenty accurate, especially for soil.

1212ham said:

Soil or hydro? ph of what, the water going in, the run-off or the soil?

I second JSB99's suggestion of ph test drops. More reliable than cheap meters and plenty accurate, especially for soil.

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I've never checked the PH for anything. I was gonna ask what another method of testing water/nutes would be i can't seem to find a good PH Pen/meter on Amazon for less then $20, the reviews always say they suck. I'm in Canada probably more choice on the american Amazon.

jonl92 said:

I've never checked the PH for anything. I was gonna ask what another method of testing water/nutes would be i can't seem to find a good PH Pen/meter on Amazon for less then $20, the reviews always say they suck. I'm in Canada probably more choice on the american Amazon.

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$20 is really cheap for such an essential tool. The droplette kits are only $5 on Amazon. pH levels are crucial for the plants to be able to take in and transport all those nutrients throughout the plant.

Here's a chart showing the different nutrients, and the pH range necessary for transport.

I liked, they are around $15. But, the kits come with pH up and pH down, which you'd need anyways, for adjusting the pH levels.

PH test kit

If you're a soil or coco grower I recommend a product called Recharge, it can be had for $25. Add it into your feeding and the beneficial microbes will assist in breaking down the nutrients and making them more bio available to the plant. Even if your PH is high or low, your plant will be able to uptake nutrients.

1212ham said:

Soil or hydro? ph of what, the water going in, the run-off or the soil?

I second JSB99's suggestion of ph test drops. More reliable than cheap meters and plenty accurate, especially for soil.

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Soil, it was pH of water going in. Did some more research and low soil pH is the main cause of calcium deficiency. So what we have is probably calcium deficiency caused by low soil pH.

Takeoff28 said:

Soil, it was pH of water going in. Did some more research and low soil pH is the main cause of calcium deficiency. So what we have is probably calcium deficiency caused by low soil pH.

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To clarify this, the pH was not in the range necessary for calcium to be transported throughout the plants.

To say that your plants were suffering from"Calcium deficiency", is to imply that you weren't adding enough calcium for the plant's needs. What's happening here is that the pH was out of range, the result of which caused the plants to suffer from calcium deficiency. If the problem was actual calcium deficiency, the solution would be to add more calcium. Because the problem had to do with the pH, adding more calcium would have done nothing. The solution is actually to adjust the pH.

After identifying an issue, it's best to search for all the known causes before attempting a fix.

jonl92 said:

I've never checked the PH for anything. I was gonna ask what another method of testing water/nutes would be i can't seem to find a good PH Pen/meter on Amazon for less then $20, the reviews always say they suck. I'm in Canada probably more choice on the american Amazon.

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Even the cheap pens will work as long as you keep it calibrated. Mine was around $16, and it has worked fine for a couple years. I calibrate it about once a month, which takes just a couple minutes. The drops can give you a general range of where the pH is, but the pens are way more accurate.

Calcium deficiencies usually show early to mid flowering from my experience. Most commonly from ph being too low causing lockout. I know your not growing In hydro, but if you were, it is important to let your ph drift a little and not keep ph at an exact decimal point. This way it can absorb nutes through a wider ph range.
Im pretty sure compost increases ph in soil!? Could top dress with a bit of compost or add a little dolomite lime to increase soil ph a bit??