Diagnosis Please!
- Thread starter borabora
- Start date
the widowman
Well-Known Member
have you got good ventalation and a fan on the go all the time the lights are on. that could be your problem maybe no. its flowering fine for third week.
nongreenthumb
Well-Known Member
Looks to me like a mix of nutrient burn and the ph being way out
I was fertilizing about once a week with Fox Farm nutes. The ventillation is good and the temps are in the mid 70's. I was thinking maybe severe nutrient burn? I flushed it about 4 days ago with Clearex Clearing solution. I havn't PHed my water (tap), ive just been letting it sit for 24 hours before use. Should I switch to store-bought distilled water? Does anyone think it may be a Mg defiency, or any other kind?
TheConstantGardner
Well-Known Member
Looks like Mg deficiency. 1/4 tsp epsom salts per gallon of water at your next feeding. If you weren't in flower you could mist them with this for a quicker recovery.
letting your water sit for 24 hours will allow the chlorine to evaporate. Definitely check your water pH as pH fluctuations can cause similar problems. Also check the pH of your runoff water and compare the difference. You can gauge the pH of your soil this way if you don't have a soil tester.
Good luck friend!
letting your water sit for 24 hours will allow the chlorine to evaporate. Definitely check your water pH as pH fluctuations can cause similar problems. Also check the pH of your runoff water and compare the difference. You can gauge the pH of your soil this way if you don't have a soil tester.
Good luck friend!
mogie
Well-Known Member
From FAQ:
What does pH mean?
The degree of acidity/alkalinity of a solution is identified on the ph scale of 0 to 14, with a pH of 7 representing the neutral point. The pH scale is logarithmic, meaning small changes in pH represent large changes in the degree of acidity or alkalinity. For example, a solution with a pH of 5 is ten times as acidic as a solution with a pH of 6, but a solution with a pH of 5 is 100 times as acidic as a solution with a pH of 7. The pH of the nutrient solution is a major determinant of nutrient uptake by the plant.
What does pH mean?
The degree of acidity/alkalinity of a solution is identified on the ph scale of 0 to 14, with a pH of 7 representing the neutral point. The pH scale is logarithmic, meaning small changes in pH represent large changes in the degree of acidity or alkalinity. For example, a solution with a pH of 5 is ten times as acidic as a solution with a pH of 6, but a solution with a pH of 5 is 100 times as acidic as a solution with a pH of 7. The pH of the nutrient solution is a major determinant of nutrient uptake by the plant.
babygro
Well-Known Member
NGT
I agree.
The leaf tips are burnt at the ends from over-feeding. The leaf in question is showing classic signs of out of whack ph, which is unusual for a soil grow because the soil buffers the ph to an extent, but that doesn't mean it can't be moved by excessively acidic or alkaline water.
babygro
Well-Known Member
hiya borabora
I'd say your plant is overfed, ease back on the nutrients - look at the leaf tips - see that yellowing and browning right at the tip? That's caused by overfeeding.
The leaf shows classic signs of out of whack ph or possible nutrient lockout, due to excess irrigation water salinity.
It's not Mg, that would happen on your lowest leaves first - not a middle one.
The first thing you need to do is check your irrigation water ph, if it's excessively out of range from 6-7, you need to start adjusting it.
