Posted: 23/04/2012 at 08:02
If there is, the commercial growers will have found it.
There are three things needed for plant growth (besides water and nutrients): warmth, carbon dioxide and sunlight, the latter two being needed for the photosynthesis that generates the energy the plant needs to grow. Commercial growers control this by increasing the intensitt of light and keep the lights on for 24 hours a day, and by injecting carbon dioxide into the atmosphere inside their glasshouses, and by carefully controlling temperature. There is a limit to the amount of warmth or sunlight a plant can take before its leaves start to scorch or wither.
We amateurs do what we can with warmth and sunlight and by feeding and potting on etc., but we can't provide light 24 hours a day, or inject carbon dioxide, or provide continuous temperatures of around 25 C