if in delt get help

hey got these 5 ww plants,just started 12/12 and noticed some of the leaves have started turning yellow espescialy at the bottom of the plants and on the new leaves on 1 of the plants,and on 1 of the plants the tips on the leaves are turning up!! any ideas?? guessing sumthink t do with nutes??? help!!
600 watt hps 3 feet away from top of tallest plant
gud air supply (fan)
ph 7
watering 1 litre each plant every 3-4 days
using miricle grow soluble plant food once a every 10 days

Pics would help and you should really post this sort of issue in the Plant Problems section- you'll get many more responses. Just from the sound of it, it could be Phosphorus deficiency since in flowering that can cause yellowing/browning/crispy leaf tips that can turn upward.

Regardless of whether Miracle Grow is bad or good, it's not enough to finish flowering healthy plants. You'll have to get some better fertilizer.

In my personal opinion, MG is plant poison.

Mother's Finest said:

In my personal opinion, MG is plant poison.

Click to expand...

any nutes are poison in the wrong hands.


i do agree that pics would help.

without pics i would say heat problem

pH problem ( should be more like 6.5)

possible phosphourus issue.


Chances are with a good flush of pH6 all will be well.


If you want more help post a pic and your setup details.

running temps day/night
RH
NPK of your MG nutes
exhaust fan
intake fan
pot size
plant size
plant age
etc


J