I have three plants with problems. One is looking pale green, particularly in the new growth up top. It seems to be worsening, fading to yellow in places. There are purplish stems on the upper leaves also. The other two are constantly pointing their leaves sharply upward, instead of nice and spread out. This seems to be most pronounced in the mornings, when the lights have just come on, and seems to generally fluctuate throughout the day. I really have no idea what's causing this, help?
My system: 400W Sodium HPS (Son T Agro)
about 4 foot square, about 5 foot high.
temp around 76-80 in the day ((25-30 C)?)
60-72 at night ((15-22 C)?)
3rd week of flowering at 12/12
Plants are Mazar from dutch passion - a Skunk#1/Afghani cross.
Using soil, 2 parts potting compost to 1 part perlite.
Fertilising using Canna's Terra Flores (previously Terra Vega for vegetative growth).
In largish pots.
Have no pH kit, but am pretty sure its stable, I think!
I have tried using Epsom salts in case it was an Mg deficiency, but have'nt had time to see any results yet, plllleeeaaaaassseeeee help me......
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