Maybe you are right. My gardner only comes once a month, but one hedge is 8 foot high while the other is two feet high.
Are wetting agents available in Cyprus. Maybe this is an opportunity contact me:
Soil wetting agents are designed to overcome water repellence in soils. Sandy soils, soils high in organic matter and potting mixes are the most likely to become hydrophobic. When these types of soils are watered with a hose, the water simply rolls off and is not absorbed. This can be a trap for gardeners who think they have watered their plants when in fact the water has simply rolled to the sides of the pot and out the drainage holes without wetting the soil at all. So "well-watered" pots can often be seriously drought stressed.
Soil wetters help to overcome the effects of waxy organic coatings on the surface of the soil and the surface of organic matter so allowing the water to penetrate and be absorbed.
What soil wetters do not do is to change the structure of the soil. They do not improve soil as such. Slow rates of water infiltration can also be the result of factors such as soil compaction and heavy clays. Soil wetters will not solve these problems and other strategies need to be employed. These include cultivation, the addition of organic matter and/or gypsum, or the use of "clay-breaking" products which affect the chemical composition of the soil so that particles clump together and create pore spaces through which water and air can move.
It is important to do what you can to avoid allowing soil and potting medium to dry out to the point where it becomes hydrophobic.