My garden is alive with birds. Butterflies and bees also seem to find it an interesting place to visit. Iím always on the look out for plants that will attract even more of these exquisite creatures. Fortunately there are many that have low water requirements which is a prerequisite these days.
But how do you plant something new given the new water restrictions? And what about those existing trees, shrubs and perennials that birds, bees and butterflies depend on? How much water do they need to survive?
Everybody loves winged creatures in the garden. Adding plants that attract birds, bees and butterflies is at the top of the list of requests for nearly every garden that I design.
Trees that provide fruit, seeds, nectar and protein from insects attract many kinds of songbirds. Our native Big Leaf Maple is a favorite of the Evening Grosbeak who relish the seeds and early spring buds. Another bird magnet is the dogwood. Our Pacific dogwood as well as the Eastern dogwood and even the hybrid of the two, Eddieís White Wonder, all are very valuable sources of food for many birds. Their summer berries are high in fat and important for migratory and wintering birds.
In every garden possible I try to include low water use shrubs and perennials that attract birds. My favorite Lesser Goldfinch is partial to the seeds of yarrow, buckwheat and aster. Kevinís mahonia is favored by Western bluebirds. Blooming now in our own neck of the woods is Mexican elderberry. Their butter yellow flowers will form purple berries rich in carbohydrates and protein and attract an incredible number of birds. And I always can find space for another variety of manzanita or ceanothus.
Both hummingbirds and butterflies are attracted to flowers that provide nectar. Among their favorites that wonít break your water budget are natives such as penstemon and salvia. Galvezia, mimulus, monardella, California fuchsia and ribes are also important nectar sources for them in your garden. Add a couple non-native, drought tolerant perennials like lavender, gaura, coreopsis, verbena, scabiosa, lantana and wallflower and youíll provide a feast for all your winged visitors.
So how much water do different types of plants need during the heat of summer?
As a rule of thumb, trees and large shrubs need deep but infrequent waterings. They should be on a separate valve than your smaller shrubs and perennials. After the last two winters of little rain, many trees are showing signs of stress. Itís not easy to replace a tree that will take 20 years to regrow if you have to replant. Water ornamental trees 1-3 times per month depending on the type and soil. Tree roots are 12-36Ē deep and require 10 gallons of water per inch of trunk diameter.
Apply with a soaker hose, drip system emitters or hand held hose with shut off and soft spray attachment according to your water districts restrictions. Donít dig holes in the ground in an effort to water deeply. This dries out roots even more. Be sure to water the root zone to the indicated root depth every time you water. Watering deeper than the root zone only means you are wasting water. You can test how deep you watered by pushing a smooth rod -1/4Ē – 3/8Ē in diameter- into the ground soon after you irrigate. The soil probe should easily slide through the wet soil but become difficult to push when reaching dry soil.
The roots of smaller shrubs are 12-24Ē deep in the soil. Established native shrubs may need only monthly waterings to keep them looking their best while other shrubs may need watering every 7-10 days during the heat of the summer. Perennial roots only go down 12Ē or so and may need watering once or twice a week depending on itís water needs.
With lots of mulch and the above watering tips you can keep all your plants happy and healthy for everyone to enjoy.