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DevokeOG started grow question 5 years ago
Getting some brown dots on a couple leaves on my plant ;( cal-mag deficiency? What do you think?
First grow-Gorilla Glue Auto
17 weeks
First grow-Gorilla Glue Auto DevokeOG
Gorilla Glue Auto
24 comments · 4 years ago
Resolved
Week 4
Leaves. Color - Dark-brown
Next_Level_Herbs answered grow question 4 years ago
Heat Stress This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. Nutrient Burn the plants have all the nutrients they can possibly use, and there’s a slight excess. Back off the concentration of the nutrient solution just a touch, and the problem should disappear. PH Problem it is due to the pH being off. Too high or too low a pH can lock up nutrients in the form of undisolvable salts and compounds, some of which are actually toxic to the plants
Smokwiri answered grow question 4 years ago
lower your feed for a week, probably nutrient burning
if you used canna 20 years ago, never had problems with it, just don't use too much
pureblaze420 answered grow question 5 years ago
I believe its calcium and manganese defiencies. Calcium for brown spots and manganese for black spots. Your leaves are cupping which is a sign of heat stress. Your gonna need better ventilation and more food!
biggreens420 answered grow question 5 years ago
Looks like your growing nft (nutrient film technique) style do you cover the roots and do you keep the nutrient reservoir chilled i know in nft it's better to run cooler water around 18degree c in nft
Jeff123fish answered grow question 5 years ago
Your ph is fine. Check out @bigdaddyk he does dwc and his ph is the same as yours. And his plants are always on point. I do t know enough about you nutrient line except it says it has micros. So I’d doubt it’s a deficiency. You might try raising the light a little to relieve the stress on the plant. It’s showing a phosphorus burn so you should probably cut back on the nutes a little. The only other potential issue I see is the roots are not getting enough air or your watering the roots too often that’s why the leaves look puffy
Removed answered grow question 5 years ago
Do you notice how many leaves have the edges curling upward? That's a clear sign that your pH is way off. I had that same thing happen to me last grow, you can check my first diary, I had those symptoms most of the grow until I started measuring pH and correcting it.
The correct range for hydro is 5.5 to 5.8, having it a little off is fine, but yours is too much out of range; no it's not just a little, because the pH scale is logarithmic, what this means is that 6.5 pH is 10 times more alkaline than 5.5. Once you correct that, you will see a healthier plant almost overnight.
Chameleon answered grow question 5 years ago
You're PH is a little high for hydro you've probably locked out some nutes which are better absorbed at a lower PH - Try looking here it will give you a better understanding !!http://www.growweedeasy.com/ph#hydroponic-soilless-pH
Hope this helps