I think your pH is off, and something else is locking out nutes as well, possibly from the soil mix. Check the pH of your runoff and then follow this flush instruction:

Water HEAVILY. To the point of runoff, with plain ph'd tap water (at pH 6.8 if the runoff pH shows that it is below 6.6, or pH 6.5 if it is above 6.9), and use 3x the water as the volume of the pot. You are flushing the plants. You don't have mag def, so the epsom salts were not needed, and you will want to remove them from the soil.
After you flush, water with 1/4 strength grow fertilizer.
stinkyattic Reviewed by stinkyattic on . Please help them theyre dying! please help me, ive described my setup as best i can, ive spent hours looking at posts on here and i still cant tell what is wrong with my plants :( -indoor grow -soil -vitamix soil -nothing added to the soil -Soil pH = 6.5 -Water source = tap water -Water pH = 6.5 -Age of plant = 4 weeks Rating: 5