Can anyone help and identify if this something to worry about?

[Wojo78]

Hello all,
here are some pictures of my White Widow Auto-flowers, they are entering the third week of flower and I am noticing some spotting on a few of the leaves. I'm not sure what it is and it is showing up on 2 out 3 Widows I have growing. Should I be concerned? I'm no expert yet and judging by the books I have and some preliminary research on line, it looks like some form of deficiency? Manganese deficient perhaps? Any help and advice will totally be appreciated.

Wojo78

 

[Emilya Green]

Looks like the beginnings of a calcium deficiency. If you are already using calmag, I would up the dose a bit. I am assuming from the healthy look of your plant so far, you have the pH and all that figured out.

 

[Wojo78]

Hi @Emilya, thanks for the tip...I'm 30 minutes from lights back on and I will take some more pictures and post, I realize these ones don't show the extent of the problem. Assuming it is a calcium deficiency, I would prefer an all natural remedy; as I am trying to grow as organic as possible...I'm thinking ground up eggs shells mixed into the soil before watering? As far as magnesium...could I use the magnesium from magnesium supplement gel caps..? Trying to think outside the box.
Thanks

Wojo78

 

[Emilya Green]

Hi @Emilya, thanks for the tip...I'm 30 minutes from lights back on and I will take some more pictures and post, I realize these ones don't show the extent of the problem. Assuming it is a calcium deficiency, I would prefer an all natural remedy; as I am trying to grow as organic as possible...I'm thinking ground up eggs shells mixed into the soil before watering? As far as magnesium...could I use the magnesium from magnesium supplement gel caps..? Trying to think outside the box.
Thanks

Wojo78

Although I commend your zeal to stay completely organic and natural, egg shells not prepared correctly will not break down fast enough to provide what your plants are needing right now. Given about 20 days to ferment the calcium and phosphorus out of the eggshells, you can make a very nice calmag+ alternative,

Emmie's DIY CalMagPhos+ From Eggshells

This is an awesome product to use during the changeover period from growing to flowering/fruiting on all of your plants. For most of us, by using molasses we are able to get the magnesium that our plants need, but for our calcium needs, most of us have to fall back on a commercial product, and...

www.420magazine.com

but you really need to get on this now. Also, put too much magnesium in your soil and you are likely to lock out other nutrients, so the gel caps are probably not a good idea.
There are organic versions of calmag available to purchase. You don't really have time here to reinvent the wheel and hope something works. Get some organic calmag and fix this problem before it turns into something that is going to affect your yield.