Problem Solver

  • Why have my dahlias stopped flowering?

    By midsummer, dahlias should be starting to pump out the blooms, but I'm often asked why these normally reliable .....

  • What are the sticky bumps on the stems and leaves of my plant?

    It can be worrying when you come across something unusual in the undergrowth, especially when it takes the form .....

  • Why are the leaves on my buddleia curled and yellow?

    The leaves on buddleias across the land have been showing curled, yellow symptoms which have left gardeners puzzled. The .....

  • Why have the leaves turned brown on my box plants?

    Gardeners have noticed a scourge of box bushes that has turned their leaves brown in recent years. First it .....

  • What makes stems die back on roses?

    The short answerRose dieback, where stems die back from the tip, is usually a sign of a weakened plant .....

  • What are the clumps of twigs in trees

    The short answerThose dense, nest-like clumps of twigs in a tree, most often seen in birch in winter, are .....

  • What are the black spots on hardy palm leaves

    The short answerBlack spots on hardy palm leaves are almost always a fungal leaf-spot disease rather than a sign .....

  • Why don’t roses open fully

    The short answerWhen rose buds form but fail to open, turning papery or brown instead, it is usually 'balling': .....

  • Why do my plants get powdery mildew

    In late summer and autumn, many plants get an attack of powdery mildew. Herbaceous perennials such as phlox and .....

  • Fig mosaic virus – keep an eye out for this disease

    I seem to have been talking about plant viruses quite a bit this last year or two, and the .....