06/07/2026
A market gardener in Tennessee told me she's never planted a vegetable bed without thinking about companions in 50 years. 'Some plants help each other. Some plants fight. Once you learn which is which, the garden runs itself.'
Her starter list: tomato loves basil. Carrots love onions. Cucumbers love nasturtiums. Beans love corn. Marigolds love everything.
I planted my main bed by her rules three years ago. Pest pressure dropped 70%. Yields went up 40%. I haven't fertilized that bed since.
Companion planting is not folklore. The science is solid — root depth pairings, scent confusion of pests, nitrogen fixation.
Full list of proven companion pairs below 👇