Whats wrong with this leaf?

bertiswho

Active Member

• May 9, 2012

• #1

Pulled this of my plant today, just a couple of these guys on the plant, iam guessing its a phosphorus or potassium def. Does anyone know what it is and how to correct it?

 

cannofbliss

Well-Known Member

• May 9, 2012

• #2

could be a number of things and without an accurate info on other growing factors then no accurate diagnosis can be given...

so in other words cant tell you if its turning purple either from temperature differences, or there is a lock out of phosphorus from pH, or a deficiency...

so cant accurately give you an answer...

 

crazyhazey

Well-Known Member

• May 9, 2012

• #3

look up the deficiency chart, im too high to do that.

 

bertiswho

Active Member

• May 9, 2012

• #4

1000w hps....7 gallon fabric pots w/super soil.....daytime temps 75-80 humidity 45-50 nighttime temps....65-70 humidity 50-55.......soil ph is about a 7

 

crazyhazey

Well-Known Member

• May 9, 2012

• #5

bertiswho said:

1000w hps....7 gallon fabric pots w/super soil.....daytime temps 75-80 humidity 45-50 nighttime temps....65-70 humidity 50-55.......soil ph is about a 7

Click to expand...

pH should be 6.3-6.7

 

cannofbliss

Well-Known Member

• May 9, 2012

• #6

and your nighttime temps under 50 prob solved way to go team ...

 

cannofbliss

Well-Known Member

• May 9, 2012

• #7

whoops apparantly im too high to read either lol

that was your humidity...

 

cannofbliss

Well-Known Member

• May 9, 2012

• #8

if its just a couple of leaves i wouldnt worry about it, as discolouration of the leaves happens later in flowering as the plant starts to eat up the nutes in them...

if anything jjust give a dose of phosphorus and wait a week and see if that doesnt take care of it...

good luck and enjoy the grow...

 

bertiswho

Active Member

• May 9, 2012

• #9

As i look at the plants more and more, its def a phosphorus problem due to the soil ph, you were right crazy....so i think iam just gonna give it some phos when i water, hopefully that helps it thru the last 4 weeks.

 

crazyhazey

Well-Known Member

• May 9, 2012

• #10

bertiswho said:

As i look at the plants more and more, its def a phosphorus problem due to the soil ph, you were right crazy....so i think iam just gonna give it some phos when i water, hopefully that helps it thru the last 4 weeks.

Click to expand...

peat moss or low pH water may help it out a bit.