Image above of my Chilli seedlings growing on my kitchen window ledge taken yesterday. At present I turn them full circle square every 24 hours. To the science bit…
Phototropism is most simply defined as:
the growth of plants towards a source of light
source Collins English Dictionary 2009
In more detail it is defined as:
The growth or movement of a fixed organism toward or away from light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light. Certain sessile invertebrates also exhibit phototropism.source: The American
Heritage® Science Dictionary 2002
Wikepedia explains it further, but unless you’re a total plant geek like me, you might not wish to read another not Peter definition. Moving swiftly onwards…