With gardening, there are only so many things that have an effect on plant growth. In other words, there are only so many things that can go wrong. Together, these things are known as growth influencing factors.
Having a thorough understanding of each factor gives the indoor gardener the ability to identify and correct less than perfect conditions before they become a problem.
In order to get the greatest benefit from this information, you need to understand your indoor garden will only be as successful as the least perfect factor allows. So it only takes one factor to be out of the acceptable range to cause a problem.
Knowing the ideal range for each growth influencing factor and having the ability to keep each and every factor within it's ideal range will result in maximum growth and maximum yields.
When a problem of unknown origin occurs, this list becomes a priceless tool. Check the list from top to bottom to identify the source of the problem. The growth influencing factors are...