Questions

Over ten years, Gerry Daly answered more than 5,000 gardening questions. His knowledge is based in science and practical experience, and by working on radio and television. Access to the advice database is open

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Tall Dahlia leaves on the bottom half are yellow round the edges plant otherwise looks very healthy what could be the cause

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I have a weird problem with my Datura and I wonder if anyone has come across it before?My Datura is flowering. It is of the double flowered type. That is to say, the flower is supposed to be double-decked with an inner bell shape and an outer one. The first flower opened and when I looked up inside it I could see the ruffles of the inner bell. However, the inner bell never came down so you could only see it by looking up the 'skirts' of the flower. The flower turned brown from the inside out and was ugly within a few days of opening.It's almost like the inner flower is stuck and rotting as it can't come down. I tried giving it a little tug but it didn't want to come down and the whole flower came off.There are lots more flowers coming on the plant and I was really hoping not to suffer from the same problem (see photo on my journal of today).

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I have lots of lillies in pots and in the ground. They have largely stopped flowering by now and I am wondering if I should let the stalks die back naturally or cut the stalks. Would appreciate your advice

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Hi Gerry, thank you for your advice recently about watering my horse chestnut trees. it seems to have stalled the dying leaves however i was just wondering from going through the website you seem to recomend not feeding some trees and feeding others. would there be any use in feeding my horsechest nut to help them along and why would i not? also these trees are incorportated in a lawn and therefore have grass up to the base of the tree should i spray around the trees and limit the competition from the grass? someone suggested that i should root with a stake wround the trees and pour water into the holes to allow extra water down? thanks

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I was told that a great way to protect cabbages was to place rhubarb leaves in water and bring to the boil. Once boiled, allow for the water to cool down and then add a small amount of washing up liquid. You then spray your cabbages with the water and the washing up liquid allows it to stick to the leaves thus offering protection. Is this correct please ?

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My tomato plants in green house have whitefly. I have been useing Derris dust its not working, fruit has formed.

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