Companion Planting for Bok Choy
A cool season vegetable in the cabbage family, bok choy is moderately difficult to grow, according
to Cornell University. Careful pest control is a must, especially for spring plantings. But, because the
leaves are the edible portion of the plant, many gardeners are leery of any pest control solution that
involves spraying the leaves with chemicals. Companion planting offers a potential solution to pest
control while providing other benefits.
Background
Growing certain varieties of plants together for mutual benefit, companion planting is based on a
combination of folk gardening wisdom and empirical evidence. Collected garden wisdom seems to
suggest there are good reasons for growing certain plants close to each other, while other plant
combinations should be avoided so as not to hinder plant growth. In addition to natural pest control,
companion planting may also result in positive changes in the chemistry of the soil and in the variety
and number of microorganisms it contains.
Pest Control
Bok choy is vulnerable to cabbageworms, maggots, flea beetles and aphids. Select herbs and/or
vegetables to plant near bok choy that send these pests scurrying the other way. Choose companions
based on what pest you need to get rid of. Plant celery or thyme near bok choy to repel
cabbageworms. Plant any vegetable in the onion family to deter maggots. Plant rosemary, sage,
thyme, coriander or nasturtiums to help keep flea beetles and aphids away.
Enhanced Growth
Not just a defensive strategy, companion planting can also be a way to stay on the offensive. Bok
choy may experience improved growth and health if you plant it near one or more of the following
vegetables or herbs: beets, bush beans, carrots, chamomile, chard, cucumbers, dill, kale, lettuce,
mint, nasturtiums, potatoes, sage and spinach. Growing chamomile, garlic or mint along side may
even improve the flavor of your bok choy.
Techniques and Tips
If you want to plant a lot of bok choy, consider planting it interspersed with other vegetables -- or
incorporate it into your landscape. A bit of bok choy scattered here and there is less likely to attract
insets or worms than a large plot of this leafy green vegetable. Additionally, companion plants don’t
need to be right next to each other in order to derive the benefits. For pest control, for example,
companion plants can be planted on the opposite side of the garden or even in a different raised bed
than the bok choy.