Share 'Companion plant to crop ratios / equations? Do they exist?'
An odd question has been nagging me for years but ive never got around to asking advice:
Is there a standard way of calculating how many companion plants (per square metre) are required for effective protection against pests? For example, for every eggplant, how many marigolds / calendula would i need to plant to increase their yield? To keep whitefly away from my cabbages, how many mari…
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