Posted: 11/09/2016 at 14:14
Agree with Tetley, Hogweed & Palaisglide to some extent.
However, I've just read all of your previous posts Cat3 and can see this is a new build and you described your garden as boggy and have had lots of plant and tree problems.
I think the issue is that you are on a particularly tricky type of clay and plants have been put into holes in the clay which have been filled with bought-in topsoil. This is a recipe for disaster as when the clay is boggy, the water drains into the planting holes which act as sumps and the plants and trees suffer from waterlogging which makes the roots rot. When the weather becomes drier, the clay turns into a concrete-like layer and sucks all of the water out (as evidenced by your dry looking grass.) Because of the damaged roots, the trees are unable to support the leaves and this leads to premature leaf drop or even death.
There is no easy way to solve this issue other than by wholesale improvement of your soil by incorporating large amounts of organic matter (mushroom compost being a relatively inexpensive way of obtaining this.) Adding large amounts of grit would help too. From you previous posts I also note that you are unable to do this work yourself and employ gardeners so would suggest that rather then spending lots of money on expensive plants (and gardeners which don't seem to be very good) that you invest in getting a landscaping firm in who can use machines to incorporate the soil improvers and rotovate it all in thoroughly. Sorry if this is not what you wanted to hear but is the best advice I can offer.
Last edited: 11 September 2016 14:17:12