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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I have a blue Hydrangea growing in a large tub of Ericaceous compost (it was blue when I bought it last year). The label says the PH level should be 4.5. I checked the compost and the level is 6+ and the flowers this year are red. How do I lower the PH to get it to 4.5?
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For a number of years, I have had a lot of trouble with blackspot on roses. I found the sprays did not work very well. Any solutions?
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Is there anything I can use to kill greenfly/whitefly on my roses other than Rose Clear? I have a lot of bees, butterflies and have just adopted 5 baby bunnies (increasing every few days!) and the mother and father and I am afraid that the Rose Clear will poison them all! Any help would be appreciated. Thanks and Regards Elaine
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Hi I recently purchased a standard rose (1 mth) which the garden centre assured me could remain in the pot for at least the summer, before either repotting or planting. While the buds are flourishing, the lower leaves are all exhibiting a problem - there are a lot of small holes developing on them. I did find quite a few very small caterpillar type (inchworm?) creatures on the underside of some of the leaves, which I removed by hand. However I am just wondering if the holes are indicative of a pest or a disease, perhaps from being in too small a pot? Any advice welcome... Thanks in advance
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Hi GerryI have a climbing rose (Golden showers) that has rust. Is there any thing that I can do? or is the variety prone to rust
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While spraying off a large area to prepare for new garden I came across this wild rose with furry balls growing directly from the leaves and stem sides. Attached is photo. I sprayed this area over a year ago with Roundup but didn't get back till now. The plant may have survived this spraying as I avoided it as soon as I spotted it amongst everything else.What is it? Could it have been the previous Roundup affecting the plant? Thanks Lar Duffy
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