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Portugese laurel yellow leaves black spots

  • 18-04-2020 2:27pm
    Registered Users Posts: 2,500 ✭✭✭ Car99

    Hi All ,

    I planted about 200 portugese laurel in Sept 2018 . They're doing ok but this year on about 90% of the plants the leaves have started to yellow a bit on the lower half of each plant and have some black spots damage on them see pic. The 10% that are doing really well are more sheltered than the 90% that seem to be struggling a bit. The upper half of every plant is dark green and has new growth.
    This week I,ve thoroughly weeded around the plants and given them a feed with miracle grow. I would like to give them a slow release fertilizer this week(any suggestions on what type) .
    Also if anyone has any info on what the black spots maybe and how to treat it I would be grateful or any other helpful input.