Each plant will enjoy different PPMs than another. What I would suggest is start at 100 ppm on the 2nd week of growth and step it up each week till you notice slight nute burn. Then chill and step up the PPMs with more growth. I personally have not gone over 1000 ppm and I'll be hitting my final two weeks here in about 4 days.
Just make sure you keep an eye out for deficiencies and you'll be fine.