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of tinfoil clad cardboard behind the trays and pots, to reflect useful light from the window back to the plants.But, if you are unlucky and your seedlings do succumb to damping off disease, bin the offending seedlings and infected compost and start again

.FERA carries out masses of environmental research, and their York site is filled to the gunnels with people I feel very at home with, including plant pathologists and entomologists. There are spores and bugs galore.It was great to meet Phil Jennings, also known

.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

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