Plant Science Consulting maintains a large collection of summer and winter growing species. For some species such as annual ryegrass, wild oats, wild radish and brome, 100’s of herbicide resistant biotypes are available for purchase.

Weed biotypes with different resistance profiles are available.

If you would like large volumes of a particular biotype and it is not in stock, we can multiply more seed for you but please note that several months is required for this.

If you are interested in a weed species, please contact Peter Boutsalis to check on availability.

Buy Weed Seeds