Day 20 Veg, MG def?

[FlyingSausage]

Hi everyone I am currently growing out a few plants and a couple of them are looking kind of sick. I am using FFOF /w 20% chunky perlite added for soil. I haven't fed these plants any nutes as of yet and they are just getting distilled water. This is my 3rd grow, and I'm still trying to get the hang of it.

On a few of my plants the bottom leaves are first turning pale green at the tips, and then brown dots start to appear on the leaf. I thought this might be a MG def so I sprayed the leaves with water and epsom salts at 1qt / tbsp, and today I sprayed them again with plain water. Not sure if that was the right corse of action but I thought it might work.

Is this a MG def? If not anyone know what's going on and what I should do?





Thanks!!

 

[sproutco]

Looks more like potassium deficiency. For your first fert, you might use potassium nitrate. Its 100% nitrate nitrogen so its gentle and safe to use. 1/2 teaspoon potassium nitrate per gallon of water (95 ppm n 267 k). Potassium nitrate is the ingredient in some stump removers at hardware stores. Dexol and greenlight are two brands but there are others. Check the label. After this first feed, apply a fert containing n p k plus micronutrients. Do not add more magnesium now that you have sprayed. If your npk fert contains no calcium, you might add this at 1/4 teaspoon powdered gypsum per gallon of water. Do this every third fert or everytime when supplies in the soil have leached away from repeated waterings. Watch over the next month for signs of magnesium deficiency to occur since your not adding epsom again. When flowering starts, add a one time high dose of 1 teaspoon epsom salts per gallon of water.

 

[Guest]

doesnt look at all like Mg to me.

I can see how it could resemble potassium, but I HIGHLY doubt that, its in relatively early veg, doesnt need much potassium at all.

looks more like burn or PH related problems to me

 

[FlyingSausage]

It's hard to tell, but I think my soil PH is around 7. I dont know for sure because those little paper strips are hard to read....

 

[dre86]

If you haven't given any ferts and your soil isn't preferted I'd give her a high N feed (start with 1/4th strength and gradually build this up)

 

[MynameStitch]

stop using distilled water get a different water source. Your plants need food, now is the time to use food

what nutrients do you have to choose from? hardware store? Hydro shop?

Distiled water has no minerals, plants need these minerals inbetween feedings you are starving your plant and its completely relying on the soil nutrients which will run out quickly

you also need to test the ph of these plants, have you done this? ph can be a factor in this too, but I think there is more than one problem here. Find out the ph first before you feed, if you use nutrients you may offset the balance out more and then cause bigger issues

 

[FlyingSausage]

I currently have PBP veg and flower ferts for soil, liquid karma, and a big jug of fish emultion (sp?). My soil PH is somewhere between 6 - 7 so I think that is ok... I have read on this forum that by using Fox Farm Ocean Forest I wouldn't have to fert during veg; is this correct? I just gave my plants some water yesterday, so I'll give them some PBP (5-10ml/gal) during my next watering. Thanks for the help!!!

 

[sproutco]

This should be your first feed

This should be your first feed

 

[dre86]

Stump remover? Why would he feed that? Never seen nor used that on my plants