Can roots grow in drains from a seed within a drain?
We have a problem with a drain. The drain (underground) has cracked. Within 2 metres of the drain are some 20ft leylandii trees that have been left to grow out of control. They are huge in width as well as height.
On investigation (a camera down the drain) we are being told that there is evidence of root damage. This is where my question comes in. We are being told that the root damage might be caused by an independent root growing in the drain, and that the likely cause is a seed that has got in, and grown into a root with the water from the drain and some silt.
I am struggling to comprehend this. Is it possible do you think for a seed to germinate inside a drain, with no light and limited air, to grow large enough into a root to be strong enough to break a drain? And the 20ft leylandii trees have nothing to do with it??
any thoughts much appreciated.