Wayne Mackenzie wrote:I use the tall tree pots. They’re square and tapered toward the bottom.
My seedling’s roots always head straight down.
Some yeasts and plant-growth-promoting rhizobacteria produce B-vitamins directly on the surface of plant roots. The B-vitamins stimulate the metabolism of the root cells, and help activate the plant’s natural defence mechanisms against environmental stress and foreign invaders. For example, scientists now know that thiamine (B1) activates the plant’s systemic acquired resistance in a process called “priming”. When treated with B1, the plant becomes highly “sensitised” so that it can respond more quickly against various pathogenic bacteria, fungi and even viruses. In one experiment, a single treatment with thiamine provided increased plant protection for up to 15 days!