A good sign of overfert (usually) is very dark green, almost blue-black colored foliage (sp?) which is (one of many)mistake I made on my first grow. The darker green they got the cooler I thought they looked so I kept adding stuff......sigh. Live and learn....... I know some of the folks here know a lot more about growing in soil than I do and they should be able to give you excellent advice. Sometimes it takes a day or two for them to catch up with all the posts we do but they are there......