I have just bought some brown bio mustard seed to use as a bio fumigant in my very healthy no dig veggie patch

I was wondering if there is any risk of bio mustard releasing substances that may work against the good fungi etc and inhibit the growth of my veggies in the following growing season?
I know it has fantastic bio fumigant properties to work on nematodes etc; but is that all it affects in the soil?
The plan is to clear out all the summer veggies and sow the bio mustard seed and then turn it back into the soil later in the season and then plant out agin for the Spring.

Submitted: 07:33AM, 29 Apr 2016
Answer: Hi Suzanne,

Thank you for contacting us regarding mustard seed. It has been scientifically proved effective for deterring nematodes, as the chemical glucosinolates released from the seeds is similar to synthetic commercial products. Some company claims their mustard seeds has been found to suppress many soil-borne fungal pathogen such as sclerotinia, Verticillium wilt, rhizoctonia, fusarium, and apahanamyces. You could read more from There is no evidence yet to indicate the chemical will work against beneficial soil fungi. Another commonly used companion plant is French Marigold (Tagetes patula), you could sow the seeds direct to soil and use as a bio pesticide. Please see more information on

Hope this helps and happy gardening.

Best Regards,
Yates Horticulturalist

Answered: 09:14AM, 29 Apr 2016


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