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.AdamDampen the greenhouse floor, not the plants. Water dripping onto leaves encourages fungal disease, while water splashed onto fruit can ruin its appearance.More on greenhouses and plant careFitting an automatic vent opener for your greenhouseUsing bubble wrap

off the worst affected areas, and bin them. As last year was so wet, it’s likely that fungal diseases will thrive this spring, but hopefully drier weather will check their progress. Now the sun is shining I’ll open the door of my greenhouse, to give my

During an enjoyable day scouring for new plants at a horticultural trade show last week, several growers told me about a devastating new fungal disease killing off busy Lizzies in parks and gardens up and down the country.Impatiens downy mildew

what to plant but, judging by your many comments, I am not alone.One of the (many) advantages of being a member of the Royal Horticultural Society is that any member can get free advice on plant and disease identification. The RHS advisory service

There are times when it is, quite frankly, just too freezing to do any work in the garden. In some ways I'm glad of the harsh weather; it should help to finish off garden pests such as slugs, and spores of fungal diseases such as tulip fire

-nitrogen fertiliser as it encourages soft, leafy shoots, which are easily infected by fungal diseases.I'll also practice crop rotation, so my garlic, leeks and onions will not be grown in the same plot of ground as last year. I’ll need to keep a close eye on my chives

developing the fungal disease, tulip fire.More on growing tulipsFollow our video guide to planting up a daffodil, tulip and crocus displayRead Adam Pasco's blog on growing multi-headed tulipsHow to lift and store tulipsAdvice on dealing with tulip fire

After a good few years of vegetable growing I would go so far as to say that I know a thing or two about onions and their cultivation. For instance I know that onions are prone to a nasty fungal disease called 'white rot' and I know exactly what

, as with comfrey, is as a plant food. If you soak the crushed nettles in water for about a month, you'll end up with a liquid feed that should be diluted by one part in ten before application. If sprayed on plants it can also prevent fungal disease. Nettles also

The temperature and humidity levels in my garden in the last few weeks have made for ideal blight weather. Blight (Phytopthora infestans) is a fungal disease which thrives in warm, damp conditions. My garden has been so humid; if it wasn't raining