Late Dutch Honeysuckle leaf drop
Kathy N
Hi, John
How frustrating for you! There could be a number of reasons why your plant is losing leaves. One reason could be the plant is lacking nutrients. It might be dropping older leaves to have enough energy to support/produce new ones. Try feeding it in early spring and again in early summer.
Is there grey, fuzzy mould on the branches? Did the leaves that dropped have a white bloom on them before they fell? If the plant has mouldy patches, the problem could be mildew. This can be treated with a fungicide application in spring. Do this before you notice leaves drop because by then, it is probably too late to make a difference with spraying. If the leaves that dropped had a white bloom or white patches on them, the problem could be Honeysuckle leaf blight - a growing problem in the UK - though I am not leaning toward this because the symptom you described doesn't quite fit the descriptions I have read of this problem. You might want to take a look at this link that tells more about it:
http://www.bspp.org.uk/ndr/july2004/2004-08.asp
Hope this has been helpful and please me posted on your Lonicera.
Kathy C
Replied: Tuesday 11th of November 2008 03:25 PM