Problem with impatiens

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Author Message   Bloomin  Posted on Thursday, October 18, 2007 - 12:11 pm EST :    I have been planting impatiens's in the same area, in a client's yard for over 10 years....This year, we have a lot of black spot, but also the plants in areas are stunted and deformed. At first we thought it might be from dog urine, but because it is through the whole flower bed, I tend to think it might be in the soil. Will diseases build up in the soil, so plants have to be rotated, like tomatoes? She has been spraying with fungicide, this summer, which hasn't seemed to help much. I thought of treating the soil all next season and not planting the area....any suggestions? Bloomin - Michigan, Zone "5B"   Otnorot  Posted on Sunday, October 21, 2007 - 05:32 pm EST :    Sound like the soil could use a good dose of humus and a change of plants. Why not try ageratum,marigolds,geraniums,petunias,snaps next year. Bill Otnorot - Ont, Zone "6A"   Bloomin  Posted on Monday, October 22, 2007 - 07:14 pm EST :    The soil isn't the problem..she lives on a horse farm and the soil is beautiful. we call it chocolate cake. It is mostly shade, just maybe 2 hours of sun, at the most... Bloomin - Michigan, Zone "5B"   Malgorzata  Supporting Member My Garden Posted on Monday, October 22, 2007 - 10:45 pm EST :    Janice, my first guess would be fungus. I have had similar problem till I started to use fungicide (actually thinking of my roses and Clematis) in winter/cleaning time. Soil drench fungicide could be an answer if you can use it. Or some other disinfection method during the winter time. Planting something different in a spot for a year would also make a difference. This link may help, http://www.ext.nodak.edu/extnews/hortiscope/flowers/impatens.htm Malgorzata - Fukuoka-Kyushu, Zone "8/9"   Bloomin  Posted on Tuesday, October 23, 2007 - 12:20 am EST :    I think it is a fungal problem also. I suggested to my client that we just do large flower pots filled with impatiens and other shade annuals. Treat the soil this fall and next spring and fall, then maybe try again....thanks for the help. Bloomin - Michigan, Zone "5B"   Malgorzata  Supporting Member My Garden Posted on Tuesday, October 23, 2007 - 02:34 am EST :    I just realized ...you have SNOW in winter! Some of my otherwise not interesting spots in the garden rely very much on successful performance of impatiens...well till Hellebores hopefully takes over. ;) Good luck Janice! Malgorzata - Fukuoka-Kyushu, Zone "8/9"

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