Brassica juncea 80-90 days. This unique plant can be used as both a green manure and a natural soil fumigant to fight nematodes. An organic alternative to using chemical applications of Methyl Bromide. Columbia basin wheat growers use it to reduce the nematode populations between wheat crops. When worked into the soil, Mighty Mustard Kodiak releases high levels of glucosinolates, a natural chemical agent that makes some brassicas spicy. When soil pests come into contact with the decaying matter and the fumes of decomposition, they are unable to complete their lifecycle. For use as a fumigant, mow down and work into the soil immediately. As a fast growing cover crop, Mighty Mustard Kodiak can produce 4-5 tons of organic matter from 6 foot tall plants in just 80-90 days. To utilize as a cover crop, mow and leave it on the ground to dry down before working into the soil. Not only does this mustard recycle existing nitrogen from its long tap roots, the plant itself has a high protein and nitrogen content and will greatly increase the soil's fertility and tilth. The best practice with cover crop mustard is to mow while in flower and before seed-set to ensure it doesn't reseed itself. Unless of course, you would like to save some seed to create your very own savory Oriental mustard! Sow spring to summer at ¼ pound per 1000 square feet; 6-10 pounds per acre.
I believe mowing the plant before seeds are set should insure the mustard plant doesn't become a mess.