yellowing leaves

Why r my leaves yellowing it looks like a sulfer deficiency. The only thing that gets changes is i go from Veg formula to bloom. I use biocanna nutes. Does switching to the 12 and 12 shock them so much it causes lockout. They r all nice and green and three to four weeks into bloom they start to yellow and the stems are purple. Im using 7 gal pots and the medium is soil. What am i doing wrong to cause the lockout lerting them dry out to much, not flushing often enough, is it my water? Any info is much appricated

Yellowing could be, nitrogen deficiency, purple stems could be phosphorus deficiency or cold temperatures...maybe these symptoms are due to nute lock out...check Ph of your medium...if within right range review you nutrient levels and increase them slightly.....with soil you maybe overloading with nutes though causing a lockout as it has its natural level of nutes...this is why i use Coco. So check PH first

And no 12/12 switch does not cause lock out...

Ok if i used water ph'ed at 6.3 and comes out 6.8 do i average them together to get the phed level. Ill be testing the water run off of the soil since i dont have a ph soil tester.

ideally 5.8-6.2ph test the run off with what you got and use ph down or up as required

light note for ref:

-.2 Battery Acid
1.2 Gastric fluid
2.2 Lemon juice
3.6 Orange juice
4.4 Beer
5.6 Pure Rain
6.6 Milk
7.0 Distilled water (H₂O)
8.0 Seawater
9.2 Baking soda (NaHCO₃)
10.6 Milk of Magnesia (Mg(OH)₂)
11.4 Household ammonia (NH₃)
12.8 Household bleach (NaClO)
13.6 Household lye (NaOH

When growing in soil any fertilizer you use can cause an excess build up of salts when it decomposes in the soil. This almost always results in a more acidic soil which stunts the plant's growth and causes brown foliage.
A Cannabis plant can also show signs of a pH flux in several ways. The leaves may begin to turn yellow or brown, dry up and/or shrivel on the sides into a straw like shape. Keep in mind however that other deficiencies and disorders may show the SAME signs of damage, so don't jump to conclusions until you do some testing and adjusting to your plants and their growing medium.

mar121y said:

Leaves occasionally turn yellow and drop off indoor plants . A few leaves are affected the leaves can suddenly start turning yellow .


Online casino

Click to expand...

Thats dependant on the severity though...old age naturally cause lower leaves to yellow but not at the top of plant..

The only thing that gets changes is i go from Veg formula to bloom. I use biocanna nutes.

Click to expand...

with no pics it's hard to tell. Biaocanna doesn't list the NPK values for any of the products they sell on their website (which is a red flag to begin with). I would guess the bloom ferts are high in phosphorus which is causing the yellow leafs therefore a higher nitrogen based fert should help. Concerning PH, flushing, lockout, ect. your way over thinking this. Read all you can here https://www.rollitup.org/advanced-marijuana-cultivation/267989-uncle-bens-gardening-tweeks-pointers.html Good Luck. ...Burn One.

stusghost said:

with no pics it's hard to tell. Biaocanna doesn't list the NPK values for any of the products they sell on their website (which is a red flag to begin with). I would guess the bloom ferts are high in phosphorus which is causing the yellow leafs therefore a higher nitrogen based fert should help. Concerning PH, flushing, lockout, ect. your way over thinking this. Read all you can here https://www.rollitup.org/advanced-marijuana-cultivation/267989-uncle-bens-gardening-tweeks-pointers.html Good Luck. ...Burn One.

Click to expand...

Agreed, with Ph averaging etc lol... follow the simple guidelines and enjoy your reward!!