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"The three sisters" method
On Tue, 30 Dec 2003 17:56:55 GMT, Janet Baraclough
wrote: The message from Frogleg contains these words: "Companion planting" usually touts the benefits of attracting/discouraging insects, but IMHO has mostly to do with with plants that enjoy similar conditions. There's more to it than that, concerning the chemicals in plants. Onion family benefit some plants (like roses) but discourage others. Mexican marigolds supposedly repel couch grass. Odd. Marigolds are recommended here to repel soil nematodes. Never heard of it as a weed repellent. And we *do* have "couch grass" under several names. Garlic is supposed to benefit roses in some way. But then, garlic is recommended for almost anything. :-) Perhaps a lot of this is owing to a strong scent or vivid coloring appearing unusually powerful. It would be very interesting to see studies of "companion planting" under controlled conditions. I find it interesting (and discouraging) that we have far more evidence of plants that *attract* certain pests. The caterpillar of the lovely Swallowtail butterfly is *mad* for dill and parsley. And carrots tops, if it can't find my parsley. |
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