Root development in transparent bottles

The question about the possible negative effects of the transparency of plastic bottles on the root development keeps our attention.

Here is Joseph TOLLEDOT’s reaction:

“I also have not noted any negative effect of transparent bottles and, as you (Willem) have seen from my photos, they are growing well. I did read somewhere that the very fine root hairs which as so important for water uptake can easily be dried up by the sun during Summer and this makes sense but I have not really noted a problem myself. A simple solution would be to spray paint the outside of the bottles. “

Have a look at Joseph’s nice pictures on:

http://www.flickr.com/photos/8511374@N06/

and look at the excellent growth of the plants.

I am cultivating myself a number of plant species in small and large transparent plastic bottles (see former postings) without any problems. I will now cover some bottles in different ways (spraying paint, like Joseph suggests, using aluminum foil, etc.).

Look out for my results in a few weeks.

(1) Young walnut, (2) bamboo, (3) papaya seedling, (4) strawberries, (5) Argania growing well with roots in full sunlight.(Click on the pictures to enlarge them).