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Over the years, Gerry has answered more than 5,000 of your gardening questions. His knowledge is based in science and practical experience, and by working on radio and television.
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I have a Robin Red and a golden maple next to each other. Both are covered in a tiny black insect. On the maple the insect appears like black spots on the leaves. On the Robin Red the insects are grouped on the stems. What is the best way of treating this? Thank you.
i keep finding this white stuff on dead plants in my indoor garden. Is that what is killing my plants? Please see photo attached
I planted some hoheria trees last year but the leaves have some type of fungal disease. There are small black spots on the underside of the leaves, the leaves turn yellow and fall off. I sprayed with Rose Clear Ultra and it definitely helped but the problem seems to be returning again. Do I need to keep spraying or should I replace the trees? Any advice would be appreciated. thanks.
We have a holly JC in our garden for the past 5 years (see photo). The bulk of branches are low to the ground and more sparse mid and top of the shrub. The leaves are also being eaten by pests. Is it too late for me to prune the lower branches and any ideas on pest control. There are pieces of leaves missing as a clue.
Why would an Aucuba japonica suddenly begin to wilt? It has been in place for a few years. The leaves have what looks like wind damage also.
I planted a Elaeagnus x ebbingei hedge 2 years ago. It has always had these insects on it and I kept them at bay by individually washing the leaves. But now it is too big and is suffering badly! There are about 16 plants and all affected. Myrtles in between are fine. Leaves have yellow patches on upper side and grey/ black powder on underside. Insects also on underside. White waxy stringy deposits on tips of branches during summer.
When raking up some leaves today I came to a pile of sycamore leaves. Most of these have black spots on them. My question is: Is it ok to add them to my leaf compost heap? Or is this a fungus that will infect plants where the leaf-mould is used?
I have a problem each year with my lilac plants, in county Monaghan. The leaves turn brown and curl up and fall off. It appears from previous "Ask Gerry" questions by others that it may be honey fungus damage. What is the treatment for this condition.
We have a beech hedge in front and back garden, it is covered in something like greenfly. At the moment cannot even trying cutting it, as there are millions of these flys on it. What would you suggest, we have tried spraying with suddy water, and spray to kill greenfly cannot remember the name of the spray, but because there are so many, nothing seems to work.
Evergreen tree which has been burnt in sections, Not sure why or how to rectify it, do i need to cut it down or remove bad sections
There' s white growth on dead roots of frost-killed Viburnum (winter 2010) Is this harmful especially to young Variegated Privet planted last Spring? To the soil in general?
Variegated Privet hedge planted last Spring. Was flourishing with plenty of leaf up to c. end Nov. Loss of leaf completely spreading from ground upwards. Normal? If so does this mean I'll have no hedgecover for 3to 4mnths annually?Or are plants dying?
I have attached photos of my Fuschia Gertenmeister, which as you can see from the photos has damaged leaves, can you please give me advice on this. No insects have been spotted on the plant but holes are obvious.
There is a silver birch tree in my garden which appears to be decaying. please see the attached picture. Do you think that the tree should be cut down or is it possible to save it somehow. Also, if it is a prevalent disease, is it possible to prevent it spreading to other trees? It would be great if you can answer soon as I am concerned that the tree may fall down.
Acer Palmatum. Roughly 20 years old. Last 2 yrs. has lost leaves early and now has lots of dead twiglike branches. Was told to leave it last year and feed it in spring. Situation is bad now. Fungus was mentioned as the cause. There is also a False Acacia near with the same problem and on BBC Gardening same tree with film was shown. Fungus was given as reason. Is this the same for the Maple and is there any hope?
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