hey stylez,
thanks for your super fast response.
the soils data is as follows:
75mg/l n and p, 300 mg/l k (maybe thats to much?), 100mg/l mg and 30 mg/l sul.
i did feed with tomato feed (6-5-9) 1/8 strength at the very beginning, approximately 3-4 weeks ago. since then only water.
i do not think it is too much on p; it must be all washed out since then. the leaves have a light green color. no wilting or anything. the main 'bud' on top is putting out pistils; looks quite healthy. hmmm...
i added 15 more watts yesterday, so i am at 100 w now. but i did not pay attention, so i do not know if this was coming over night. but i do not think the additional 15 w caused this. must be a deficiency on something.
i plan on feeding a higher concentration tonight, 1/2 strength. does this sound like a bad idea?