The program is more or less foolproof and they are good products. I always specified similar things that were cheaper though. You can buy the same stuff in bulk for a fraction of the retail products, for example. And if people are getting nothing out of Scotts they probably will not out of anything else. Usually this is because they are not applying properly or at the right time. If the soil is out of balance, the fertilizer cannot be picked up by the plants. Watering correctly is also part of the equation.