Trees, Fruit Trees, and Evergreens
For trees to establish strong, deep roots, they must be watered to encourage this growth. This means giving the tree 15-25 gallons at a time–depending on the size of the tree–for the first few years after planting. Watering should be done consistently every 7-10 days for the health and establishment of the tree, but there’s no perfect formula for watering. If your tree is small and the weather has been cool, you’ll need less water, less often (15 gallons, 10 days) than if you plant a large tree and the weather is very hot and dry. In the latter case, you’ll need to water closer to 7 days and around 25 gallons. All watering should be done right up until frost to give the trees what they need to overwinter. It may seem odd to water into October or November, but it is advisable to avoid damage.
Shrubs, Small Fruits, and Vines
For shrubs, vining plants, and small fruits, watering 2-5 gallons per week, and every 3-5 days, should be sufficient. This frequency of watering shrubs differs from that of larger trees because the root systems of shrubs are not as deep and there is more competition for the water closer to the surface. Watering should be done consistently every 3-5 days throughout the season but remember to connect with your environment and pay attention to the heat and rainfall as they will affect the overall amount you need to water. Cool weather: you’ll need less water, less often (2 gallons every 5 days). And Hot, dry weather: you’ll water 5 gallons every 3 days! Like with trees, all watering should be done right up until frost to give the shrubs enough water to overwinter. It may seem odd to water into October or November, but it is advisable to avoid damage.
Perennials need less water than trees or shrubs , but generally need to be watered more often. While some species are more drought tolerant than others, 1-2 gallons per week for most perennials is adequate and watering every 1-3 days, should allow them to thrive. Following the specific watering instructions on plant tags can tell you which of your plants likes to dry out between waterings and which prefer a moister environment.