The most important thing a gardener can do to reduce the allergy potential of a garden is to plant those species which cause little or no allergy. Allergenic plants that already exist in the landscape may be removed, one at a time, and replaced with cleaner choices. In addition to the selecting and planting of nonallergenic plants, however, other important things can be done to limit allergies in the home landscape. Most lawn grasses release their pollen from about 3 am to 8 am. Therefore, it is never a good idea to mow lawns early in the morning.
Hardware stores sell inexpensive, yet effective paper face-mask filters to cover the nose and mouth.
For those who are especially allergic to grass pollens, wearing a mask may not be enough. These gardeners would be wise to hire someone else to do the mowing or replace the lawn with low-allergy ground cover. If you employ a maintenance gardener, ask him or her to do your yard later in the day. At the least, close windows for a few hours until all of the pollen has settled down. If they produce allergenic pollen they have a serious effect on the overall air quality of your garden.