My buxus are a yellowish green and not the deep rich green they once were. The feeds I have treated them with just give growth spurts requiring alot of work trimming but no not restore the deep lush green colour they used to have. A friend suggested iron treatments, Is this correct? What should I use?
I have a large arrangement of Buxus shrubs that appear to be continually deteriorating after the frost. The leaves are turning yellow/brown and are extremely dry. I have been watering and waiting to see if there is any recovery but the problem seems to be spreading further up through the plants from the roots. Is there anything I can do or any treatment I can give them. I would hate to loose them as the collection would be very difficult and very expensive to replace.