yellowing and burnt spots

[perfectkhaos]

i have sick plants in flower they are 6 weeks along. yellowing leaves evenly throughout the plant, some with small dark brown (burnt looking) spots, and that is on lower leaves as well.

here is a couple pics of my veg plants that are starting to do the same thing, the flowering ones are a bit worse, will post more pics when the light comes on

 

[Budley Doright]

Ill give her a guess mate....


Picture one I dont think is a def the damage is not symetric....

Im going with spilled nutrient solution when feeding on that....as the stuff evaporates the solution condenses..... but not very sure on that....



pic 4 is ghosting and cause is a lack of magnesium....


Often provided from dolomitic lime ....cal mag is also commonly used as well as epsoms salt....

 

[jonnybgood29]

it truely looks like overferting, salt buildup in soil. do a flush of the soil before adding anything else, even cal mag has fert components and will worsten the situation. flush them thorougly and resume feeding atm slighly lower rates when soil dries.

 

[Herborizer]

We need to know more about your medium, nutes, feeding schedule etc.

At first glance though, this looks like a CAL/MAG issue due to PH not being right. The leaves with the spots are classic CAL deficiency. While others show what looks like MAG lockout or deficiency.

 

[perfectkhaos]

organic grow, fox farm big bloom, and earth juice catalyst. i water about three times a week with and every third watering in feed. im mixing all my nutes in a 5 gal bucket with water 5tbls big bloom and 1 earth juice. divide that 5 gal between the 3 plants (7 gal pots)

i have had a problem with my new ph strips when i test just the water and i even the ph it works, once i add the nutes the tester is telling me that the ph is so low it doesnt regester and wont move when i try to go up.

i have been giving them just neutral water for the past few feedingins figuing something was locked out so one more and i will be able to start messing around with the nutes

 

[perfectkhaos]

btw thank you for the quick responses. and sorry about the fist post being so vague, i typed all the info in the first three times, then when trying to add pics i kept messing up and had to start over. (damn newbies) so if you need any more info let me know and i got it for you.

question - Cal/Mag deficieny is just from PH problems?? it wouldnt be found in like the earth juice i have? and if i continued with bad phed water could that result in the lock out?? how would i tell if its locked out or a deficieny

 

[Herborizer]

If truly organic, PH shouldn't matter. I believe you should not be PH'ing your water. Maybe thats the issue.

 

[jonnybgood29]

if you ask me, feedin g once a week with high nute organic or not is too much, again i think it may be overferting. i know that you organic growers will scoff at me, but it is possible to overdo even organics. mg may be the issue, but the burn patces are not uniform like normal mg deficiency. still tink you should do a partial flush, but thats just my opinion.

 

[CannabisFox]

im going with overfed or ph

 

[perfectkhaos]

i have never heard anyone say not to ph your water??? i use tap water that i filter through an omni pure in line water filter, then i make sure the ph is 7. should i decrese the "potency" of my feeding or should i feed every 4th or 5th watering?

 

[jonnybgood29]

when using full strength, feed every two weeks, weekly should be half strength, or quarter to 1/8th if every watering imho.

 

[perfectkhaos]

ok now i still need to flush, but i have heard a few diffrent things about flushing. 2x as much water as the size of your pot or 3x?

i was at quarter strength for most of the grow, i bumped it up a little when i started flower, guess that could be the problem

 

[jonnybgood29]

i always do 3x the volume of the pot and add nutes in the last gallon.... if not adding nutes at the end, you could probably get away with 2x since your problem is not too severe right now