Do you or does someone you know suffer from seasonal allergies, hay fever or asthma triggered by pollen? Are you tired of watery itchy eyes, a scratchy throat, a runny nose, sneezing and a stuffy head whenever you venture into your backyard? No, this isn’t a commercial for the newest antihistamine or decongestant miracle drug. Instead, it’s about how to have a garden that is virtually allergy-free.

One of the most common topics of conversation between gardeners is the weather. Rain, heat, cold and drought all present challenges to maintaining a good-looking garden and landscape. Together, these environmental factors are referred to as the “climate” for a particular area or region. Since these areas can be rather large, we can call these environmental factors the macroclimate for a given area. The USDA Hardiness Zone map is a resource we use to determine growing conditions over wide areas and regions.

Within the larger macroclimates are smaller areas that have different or modified conditions. These pockets may be warmer or cooler, or wetter or drier than surrounding areas. These areas are termed “microclimates” and can be influenced by buildings, trees, bodies of water or elevation changes.

Over the past months, most areas of the country have set records for heat and drought. While the experts debate the “whys” and “hows,” the rest of us are stuck with the bottom line — it’s harder to grow things. Extreme temperatures and lack of moisture stresses most garden and landscape plants that would normally be considered tried-and-true standards. In addition, the availability and expense of irrigation has become problematic ...