Doff Green Fingers Liquid Weed killer Concentrate 800ml. Doff Green Fingers Liquid Weed killer perennial weed killer systematic weed killer that kills the foliage and plant roots. Weed killing on deep rooted plants should be done when the green foliage is visible, once the plants have been treated do not chop down the vegetation leave the weed killer to do its job the plants will feed and the roots will also die help preventing further growth.
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