"25 to Stay Alive" Watering Pledge Newly planted trees — those that have been in the ground less than three years — require 25 gallons of water, approximately 1.5 inches of rainfall, per week to survive. Every Monday from May 1 through September 30, we post a tree watering alert in our weekly newsletter, our homepage, Facebook, Twitter and Instagram. When you pledge to water your trees, we will mail you a complimentary rain gauge so you can track weekly rainfall totals at your home. If less than 1.5 inches of rain falls, water your trees with the recommended 25 gallons of water. Please note all fields are required in order to process your rain gauge request. Rain gauges are mailed between May 1 and September 30. Offer limited to those within a 25-mile radius of the District. "I pledge to practice 25 to Stay Alive by watering trees on and surrounding my property with 25 gallons of water each week in times of little or no rainfall during the spring, summer and fall. I will use the rain gauge provided to me by Casey Trees to monitor rainfall totals on my property and water trees accordingly." Your contact and mailing information First Name: Last Name: Email: I would like to receive email from Casey TreesReceive Casey Trees' weekly e-newsletter, information about upcoming events, tree watering alerts, and more! Address type:Please select... Home Work Street: City: State: Please select... DC MD VAWe can only offer a complimentary rain gauge to addresses within a 25-mile radius of Washington, DC. Zip Code: Please mail me my complimentary rain gauge Need assistance with this form?