Yellow/Brown/rust colored spots

[Afrikaaner]

I'm not sure of the pH level, but i can check that after the next watering. any ideas what this might be? i know the plant just suffered some relatively minor heat issues, unless it just looks like it got too close to the lamp and is something else. but let's worry about one thing at a time for now.

these spots presented themselves recently, starting just as light yellow and slowly dying. i dismissed them as nute burn from water getting on the leaves or something, but i'm more concerned about the newer growth

cheers!

 

[Northern Grower]

Cal/mag!

You will need to up your dose of your cal/mag product, or grab some epsom salts to add to waterings.

Langbenite is an organic source of calmag. You can add to you soil.

Edit:
Here is a PH chart. For when you check your PH. To see if you are out that way, causing it.

 

[Afrikaaner]

thanks bailer! im betting my pH is low. i'll run some water through her tomorrow, as i'm feeling highly unmotivated right now.

 

[desertnance]

Love the graphics....similar to periodic table....just what the plant needs to thrive! KUDOS!

 

[hitman_64]

Afrikaaner, I see you placing bets that your ph is low. Do you have a meter or test strips? The reason I ask is because it would from my experience be that it was too high. Unless your not checking the ph of your water and water with nutes I doubt its low. Bailer hit it though. Calcium deficiency are the random spots on the leaves. Magnesium deficiency is developing if you look at the center most blades in the second pic and the nitrogen could be to blame for the new yellow growth. This is just my two cents of course.

 

[coszumel]

Should I be running Cal Mag in my watering even if I do not have R/O watrer. I use the 5 gallon bottles of drinking water from Lowes. My 5 seedlings are about 2-3 inches tall and about 5 days old.

Cosz

 

[Afrikaaner]

the reason i say low, hitman, is because with this last feeding, the water pH was ALL out of whack. i had to add about 150 drops of pH up per gallon of water to get the pH to around 6.5 (using an aquarium 3-drops-in-the-vial tester). I have been using a 20 gallon tub in the dark with an airstone running 24/7 bubbled tap that has sat for well over 24 hours, and this time with flowering nutes at about the same strength as the last feeding (just around full strength). I never tested the pH of the soil (i would have to do it by runoff) but i will tomorrow morning and try to get to the bottom of this. i do alway pH my water though to between 6.2 and 6.6 (after adding ferts) since those are easy benchmarks to get between on the tester.

edit:

oh, and also i say it's low probably, because if you look at that chart, right around the bottom of my pH ranger, calcium/magnesium start to not be absorbed well.

 

[hitman_64]

Should I be running Cal Mag in my watering even if I do not have R/O watrer. I use the 5 gallon bottles of drinking water from Lowes. My 5 seedlings are about 2-3 inches tall and about 5 days old.

Cosz

You'll probably be in need of calcium and magnesium supplements as soon as they begin to take off. You're still good for a bit. That drinking water you're using still needs to be pH'd though. Its probably in the neighborhood of 6.3 or so. Pretty high for anything other than soil.

 

[coszumel]

Thanks for the advice Hitman. I have purchased Sensi Gow Part A an B Veg. However it says for Hydro. Did I buy the wrong product or is this good for my soil. I am running Roots Organix 707. If my babaies are at the 5 day mark how long before nutes?


COsz

 

[hitman_64]

The reason I said it would probably be high is because of the new growth coming in yellow. That's either nitrogen or copper usually nitrogen locks out low as you can see but by looking at the rest of the plant nitrogen doesn't appear to be a problem. However copper locks out high. And it does it at the ph you just said your target was. Unless you are in actual soil then you are soilless. Most potting mixes aren't dirt. Most are peat moss with very little dirt. So the ph ya want is actually thee 5.8 according to the chart. I run 6.0 for everything and it does fine. So somewhere in that neighborhood should do you right.