15 gallon Ooze Tube
You'll need to water your trees once or twice a week during the first two or three summers. If you are a landlord or otherwise aren't sure you'll keep up with that schedule, you can use an Ooze tube to stretch out time between watering. Fill it up every 2-3 weeks and it will drip out water in between. Ooze tubes will be delivered on planting day.