Are Some Of Your Griselinias Dying Off?
The Garden Team come across this problem in many of our clients’ gardens almost on a weekly basis.
To the un-trained eye it can look like the plant hasn’t been watered enough and either some of the leaves are getting big, black spots or worse still the whole plant or even the whole row of plants die.
More often than not your plant has a disease.
The disease is likely to be Phytophthora. This is a soil borne pathogen that attacks the roots. Some plant species are more vulnerable to this difficult to control disease.
Options are to use a fungicide soil drench. We use a product called Phoscheck.
Alternatively, you can treat the soil with a beneficial microbe called Trichoderma. This can be purchased as Trichopel. Both Trichoderma and Phoscheck applications will need to be on-going. Digging out and disposing of the affected plants and all the surrounding soil is a better option, but obviously more expensive.
We at The Garden Team normally suggest trying to treat the soil and foliage over a few months. There is a good chance of recovering your soil and plants to a healthy state, but it’s not guaranteed.
We have commercial quantities of these products and can advise a recovery or replacement plan for you.