Need to know what my problem is, leaves are curling and turning yellow, brown, & red

[sk8sativa420]

:( i am not sure what is the problem, it is in its 7th week.

[Deepsuthern]

its probably from a lack of phosphate or nitrogen... unless you have your light too close to cause the yellow and curling. otherwise i'd say it would be a lack of some sort of nutrient

[sk8sativa420]

well the worst leaf is nearer to the bottom. i clipped some at the bottom that were dead. Some of the leaves near the top have some browning/ or almost grayish near the edge of the leaves but just a little. There is some curling with the top leaves too.

[sk8sativa420]

here are some pictures, the less severe burned leaves are the ones on the top, the newest leaves. Thanks

[Deepsuthern]

hmm...ok im not positive on this but i have a feeling that it may be from a lack of phosphate... or too much? I know that there are adverse effects on a plant if you over-fertillized but i can't remember what nute does what side effect... when's the last time you checked your ph level? my gut tells me it should be around 8

[Ganja Guerrilla]

looks like calcium & magnesium defeciencies, most likely locked out from ph related isues


answer these as best you can

1. hydro, soilless or Soil & brand name of soil ?
2. PH of reservoir solution?
3. PH soil runoff?
4. PH of water?
5. Age of plants?
6. What Fertilizer, dosages, and frequency?
7. lites, wattage & proximity to plants
8. Light cycle. 24/0,, 18/6,, 12/12?
9. In light cycle how long?
10. Room temps or reservoir temps

complete a soil runoff PH test.......
with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...collect & test the PH of this runoff water....
post the PH of the ingoing water and the runoff water

[sk8sativa420]

what is the best thing i can get to test my ph because i've been using these little soil test capsules and i dont think they are that accurate do i need a digital tester or tester papers? and also do i need to add epsom salt or should i figure out the ph first

[sk8sativa420]

i have never added fertilizers i did add fish fertizilzer which's ratio was 5-1-1 i thought it had a nitrogen deficiency but i dont think the fish fertilizer helped much its also under a 24 hr light cycle with 2 40w fluroscent tubes i think its giving off like 3150 lumens and the last time i took the ph level it was slightly acidic

[Ganja Guerrilla]

fish emulsion 5-1-1......there is your issue

that is very acidic and since you dont have a ph meter Ill assume you didnt ph correct the ferts to the optimum 6.5-6.8 range before you fed them

this has thrown off your ph and causing the issues
a PH pen/meter is best but I also recommend an aquarium chemy test kit as a backup, the pens need calibration & calibration fluids

bad PH prevents the nutrients from being available, everything that goes in the pots needs to be ph corrected to the optimum zone 6.5 6.8 so that the nutrients will be available


complete a soil runoff PH test.......
with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...collect & test the PH of this runoff water....

If the PH reading is out of optimum range 6.5-6.8 PH, you need to flush your plant.
Flush with PH corrected water, till in optimum PH range, 3 times the volume of the pots is the rule of thumb but may require much more flushing if the rootball is thick & sour
EG: 1 gal pot = 3 gal. flush

add 1/2 strength nutes to the last gallon of the flush.