This is a very natural occurrence on some species of trees and more so if the climatic conditions are suitable for the formation of aerial roots. These roots grow above ground and in air only but that air needs to be highly humid to allow the roots to form and grow. They can be used as anchors to fix the plant in place or to a rock providing additional support.
They can be formed as a method of absorbing additional nutrient and moisture. They are referred to as adventitious roots and provide an excellent opportunity for air layering for bonsai if already present. Look forward to the follow up from Derek as too what he did next with this Privet.
Here are a couple of photos from Andy. This Acer Palmatum ‘deshojo’ was bought from Swindon club members last year when they were “reducing” their collection. It has been overwintered in the greenhouse and has been recently re potted. It is looking in prime condition in it’s first burst of Spring colour.
Geoff a Swindon and Blackmore Vale Bonsai club member has posted this on our Facebook Group. I have re posted it so that all members can see what he has been up to during this lock down. Sorry for the background as it makes if difficult to see the main trees. Something to bear in mind when taking photos.
This maple was started from a cutting some years ago [I will try and find out the date] by one of the Swindon members [Robert] He was very good at growing any trees and used pond baskets and pruning to improve the girth of the tree. He then managed to seal even big cuts. Thereby improving the size.