As with certified seed it is not possible to provide a guarantee that there will be no blackgrass in the seed. We have taken steps to mitigate against this risk but due to there being no certification system, we cannot give a guarantee. Our growers are reliable partners, familiar with the land the crops are grown on, giving us the confidence that blackgrass is not an issue on these crops. We inspect and test samples of all batches of wildflower seed for Black Grass.