Strictly speaking corn should be planted around 50m away from other varieties to ensure no cross pollination. However that's not practical in most domestic gardens. If you're short on space, planting each variety in blocks can help so that they're next to the same variety. The other option is to let each variety mature at different times as they would then have different windows of pollination time.
I recently bought some Sweetcorn Stowell's Evergreen from you. Could you advise how far away it needs to be planted from other sweetcorn (not Super sweet) to prevent cross pollination.
