[FONT=Tahoma, Calibri, Verdana, Geneva, sans-serif]For the rest of you try this on your next grow if you wish, instead of soil pick up the following 1) potting mix 2)perlite 3) vermiculite. Use the ratio, 50 % potting mix, 30 % perlite and 20% vermiculite (all can be found at a gardening store). This mix is a much lighter mix then soil and allows plenty of air to the roots of the plant. Soil ends up compacting and choking off the air. You will notice the plants gaining a great deal in size over plants in soil. Due to the size difference the yield, of course, will also dramatically increase.
Second suggestion I would make is a quarter tsp of dark molasses to your watering after the plants begin flowering. Dark Molasses is a natural carbohydrate that cannabis plants love. The difference in yield is unbelievable, not only in the size of the buds but the density as well. This has been tested time and time again and has proven to be highly beneficial. Note: molasses is an additive and is not used in place of any other nutrients.
As far as nutrients go, even a 20-20-20 for veg and a fruit and vegetable flowering fertilizer will work just fine for the beginners in conjunction with the two recommendations above. As you become more proficient experimenting with the more specific cannabis fertilizers, will be a priority, but more care is involved not to be over/ under feeding nutrients.
Lastly, use distilled water start to finish through your grow if you can. Distilled water maintains a proper ph range for your girls. When you get into chlorine treated water, even allowing it to evaporate off, the ph tends to be out of range, and you end up trying to raise or lower the ph value. The most common signs of ph problems will be leaf tips yellowing, if this happens flush your girls well with distilled water. This can also happen even if using distilled due to the salts from the nutrients building up in your soil and bringing it out of range. Again flush well if these signs occur.
Good luck to all[/FONT]