Hi Gerry. I planted a Wisteria with a view to it training itself up a wall, but growth seems to be very slow. How can I encourage this, and how much growth should I expect from a healthy plant?
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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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