Harvesting Seeds: Nematicidal Marigolds
As you pull out your tomato plants this fall, check the roots for galls. These are lumpy swellings that indicate that you might have nematodes living in your soil that are stunting the tomato plant's
growth. (You can learn more about it from our Got Nematodes podcast)
We had that problem last year so we planted Golden Guardian Marigolds, the roots of which contain a toxin that kills harmful nematodes. Now it's time to harvest the seeds and turn the crop under so
it can do its job.
...