Calcium or Phosphorous deficiency?

I have 3 plants, they having or are beginning to have the same problem. This spotting progressed pretty rapidly. I noticed I have a slight drainage issue about 2.5 weeks ago and I stopped watering as frequently.

Soil is 75% Miracle Grow Natures Care Organic soil 25-38% perlite
npk on soil is 0.08/0.06/0.07 and was transplanted from 2gal pots to current ~3.5 gallon pots 2.5 weeks ago
Watering pH 6.2-6.6
Water is tap water that I allow to sit at least 24 hours open to the air
Runoff pH today was 6.6 on all three plants and water used was 6.5-6.6
Only nutrients I have used was one watering of 30-10-10 about 1.5 weeks ago.
Temperature high/low 82/72F
Humidity high/low 83/57%

Its probably a multiple nutrient problem, but my initial thinking is that the initial spotting was a calcium or magnesium deficiency, with calcium being more likely. Now that the spotting has developed, is it looking more like a phosphorous deficiency which then caused the issues with calcium/magnesium?

Thanks

Magnesium def?

I also believe it looks like a Mag deficiency. Of a Food Deficiency.

Also IMHO if the soil is only .08 x .06 x .07 they need food ????

Magnesium is The #1 Most Common Deficiency in Container grown plants.

Sounds like youre using Miracle Grow/Peters, or some kind of mass produced fert ???

If so.. they have 000000000000 Magnesium in them. They have Manganses.. But not Magnesium. Some confuse the 2.

I myself after going through $1000s worth of different ferts, ive settled on a brand called

Sun Bulb... Better Grow. Orchid Fertilizer.

They've been around since the 50s, and are also endorsed by the American Orchid Society.

They make both a Veg/Flowering formulas, contain 000 Urea Nitrogen, and only use the highest absorbable forms of the nutrient the plant needs.

It is made for Orchids, but is also great for MJ. It contains ALL of the Micros and Trace elements needed.




I also recommend on using a Diluted Formula, and feeding every time you water.

For vegging plants, at full strength, I use 2 x tsp veg x 1 tsp Flower Formulas per 5 Gallons Water.

Of course for smaller plants you have to readjust the strength. But at full veg, that is my formula.

Of course nothing is set in stone, and some plants/strains may get by with less/more/slightly different ect.

In Flowering I reverse it.

2 tsp Flower x 1 tsp Veg Formulas. Also just past full bloom, you cut back on the total, by droping the 1 x tsp Veg before dropping everything for flushing.

Sun Bulb's Orchid Culture Center
www.sunbulb.com

Purchase Better-Gro® Orchids and Products Online!
sunbulb.com/info/purchase-better-gro-orchids-and-products-online

jimihendrix1 said:

I also believe it looks like a Mag deficiency. Of a Food Deficiency.

Also IMHO if the soil is only .08 x .06 x .07 they need food ????

Magnesium is The #1 Most Common Deficiency in Container grown plants.

Sounds like youre using Miracle Grow/Peters, or some kind of mass produced fert ???

If so.. they have 000000000000 Magnesium in them. They have Manganses.. But not Magnesium. Some confuse the 2.

I myself after going through $1000s worth of different ferts, ive settled on a brand called

Sun Bulb... Better Grow. Orchid Fertilizer.

They've been around since the 50s, and are also endorsed by the American Orchid Society.

They make both a Veg/Flowering formulas, contain 000 Urea Nitrogen, and only use the highest absorbable forms of the nutrient the plant needs.

It is made for Orchids, but is also great for MJ. It contains ALL of the Micros and Trace elements needed.

I also recommend on using a Diluted Formula, and feeding every time you water.

For vegging plants, at full strength, I use 2 x tsp veg x 1 tsp Flower Formulas per 5 Gallons Water.

Of course for smaller plants you have to readjust the strength. But at full veg, that is my formula.

Of course nothing is set in stone, and some plants/strains may get by with less/more/slightly different ect.

In Flowering I reverse it.

2 tsp Flower x 1 tsp Veg Formulas. Also just past full bloom, you cut back on the total, by droping the 1 x tsp Veg before dropping everything for flushing.

Click to expand...

Thanks! I havent used nutrients yet because I figured it would first show signs of a nitrogen deficiency, then I would start. Ive seen some interesting threads of people who used organic soil with a similar composition to the soil I used, and never nutrients. I was curious as to what this soil could do since it was a similar composition and advertised to feeds for 3 months. The last time I grew years ago I avoided anything miracle grow like the plague, and I did use Peters fertilizers.

Add one tablespoon of epsom salts to a gallon of water and use some of that in your next watering. Meanwhile, put some in a spray bottle and spray the leaves thoroughly. You should see improvement in a few days.

Do what cindysid says.

Also... Why wait until it shows a deficiency ??