More than 63 inches of rain has fallen so far this year on the Baltimore/Washington region, breaking a 129 year record. Gardeners are more often in the habit of hoping and praying for rain during hot, dry spells. This year we shook our heads in wonder as buckets of rain repeatedly pelted our gardens.
Climate change has already begun to increase yearly rainfall in Maryland. The NOAA State Climate Report (data through 2014) shows that “annual precipitation has been above average for the last two decades. The annual number of extreme precipitation events (days with more than 2 inches) averaged 2.5 days per year during 2005-2014 compared to 1.8 days per year during 1950-2004.” Scientists expect a 5-10% increase in Maryland’s annual precipitation by 2050.
Vegetable crops may recover from a24-48 hr. period in saturated soil
(where water replaces air in pore spaces). Photo credit: Wisconsin Horticulture
Resiliency is defined as “the capacity to recover quickly from difficulties; toughness.” Farmers, gardeners, and researchers are looking for practices and strategies that reduce greenhouse gas emissions and help us adapt food production to the rapidly changing environment. What makes this so challenging is that in addition to rising average temperature and precipitation we will have more unusual weather and extreme events, including drought! So what can gardeners do to improve garden resiliency in the face of excess rainfall?
Zucchini in 15-gallon fabric bags growing in a well-drained growing medium. Raised beds, bags, and containers are great tools for increasing rooting depth and protecting plants from excessively wet soils. Photo credit: Connie Bowers
Become a pot gardener. These herb and pepper plants (Thai and Scotch Bonnet) are
growing abundantly against a northwest facing brick wall. Dump out water from saucers
during extended wet periods and make sure the drainage holes don’t clog. Photo credit: Jon Traunfeld
By Jon Traunfeld, Extension Specialist
References:
HGIC’s Climate Change and Gardening page has information and resources, including a Cornell University website (click “How is Climate Change Affecting Your County?”) that shows temperature and precipitation changes over the past 63 years.