Learn how to identify and control troublesome weeds. If you don't want to use herbicides, you can either starve the roots by continually removing new shoots or block out light by covering the ground with black plastic or matting.
The cloverlike leaves spread rapidly, and can invade lawns. Annuals have explosive seed pods; perennials have bulbils. Yellow oxalis in lawns resists selective weedkillers, so try scarifying in autumn.
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Scotch broom is a large shrub bearing flowers and flat pods that indicate its affiliation with the pea family.
Master gardener Paul James answers gardening questions from viewers about dragonflies, organic products, poison ivy and more.
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