Brighten your dark of winter outlook by envisioning the addition of colorful, diverse and productive habitat plantings to your garden for next season.
Including specific plants that will attract parasitoid wasps, ladybeetles, bees, songbirds and even bats can help you to manage pest problems in the growing season and make your fruiting plants more productive. It can even provide additional plants to harvest while you provide habitat at the same time.
There have been many studies showing that adding habitat strips to the perimeters of farms increases the overall on-site beneficial-insect population, allowing for increased predation on crop-damaging insects. The diversity of plants in a habitat strip attracts a variety of predatory and parasitoid insects, as well as the damaging culprits like aphids and others, providing both food and shelter for them all.
Once established on-site, beneficial insects will also forage into the crop fields and make happy use of the plant damaging insects that they find. Pollinators, songbirds and bats can make use of this border as well, if it is planted with varieties that they each favor.
For the home gardener, integrating these types of plantings among your fruits and veggies, and even your ornamental garden, will ensure a beautiful and healthy garden. (A great primer on “farmscaping,” the intentional approach to farming that includes habitat planting, can be found at this Oregon State University IPM website: oregonstate.edu/dept/nurspest/Insectary_plants. htm.)
To create habitat plantings in your garden, consider the following guidelines:
•Be diverse in the size and types of plants you add — To attract birds consider the addition of trees to your site and layer your plantings. Different birds hunt for insects and nest in different layers in the landscape.
Keep in mind the three plant families that attract the most insects: the Apiaceae (carrot, dill, cilantro), Asteraceae (daisy, Echinacea, yarrow) and Lamiaceae (mint, lavender, oregano). These families also have many wonderful and harvest-able plants and include a great variety of herbs and flowers.
•Become familiar with native pollinators and the types of plants that can host and feed them throughout their life cycles. For instance, native willows host many species of butterfly larvae and are an excellent habitat plant when included with flowering, nectar producing plants.
Native solitary bees, like the orchard mason bee, need small cavities in wood to nest in. Great pollinators for early blooming fruit-tree crops, these gentle bees benefit from the purposeful addition of mason bee houses in the garden. If you are fortunate enough to have woodlands on your property, protect those old snags and stumps as habitat.
•Pacific Northwest bat species are prolific insectivores and can help to clear mosquitoes from ponds and wetland areas most efficiently.
Add white flowering and night-blooming plants to increase moth populations, another favorite food source for bats.
Learn about the resources available to you for more information.
Close to home, look into the good work of the Pollinator Pathway (www.pollinatorpathway.com),a corridor on Columbia Street in Central Seattle where parking-strip gardens are being converted to pollinator gardens to increase and protect habitat.
The Seattle Audubon Society (www.seattleaudubon.org/sas)has classes and field trips designed to aid you in learning more about our local birdlife.
Bats Northwest (www.batsnorthwest.org)is a Lynnwood-based organization devoted to protecting native bat species through education and research. The Xerces Society (www.xerces.org),
based in Portland, Ore., is a wonderful resource for learning about different pollinators, their habitat needs and more. Its website especially helpful in learning about native bees, butterflies and dragonflies.
The Pollinator Partnership (www.pollinator.org/guides.htm), based in San Francisco, has some wonderful educational resources for educators and offers guides zoned regionally for more pollinator information.
The U. S. Department of Fish and Wildlife (www.fws.gov/Pollinators/PollinatorPages/Threats. html) has a good site with information about threats to pollinators and a guide to developing a pollinator garden.
By following the above guidelines and making use of these resources, you will not only create great habitat but a beautiful and life-filled garden as well.
For personalized information on beneficial insects, plant choices and planting techniques, contact the Garden Hotline at (206) 633-0224 or e-mail help@ gardenhotline.org.
LAURA MATTER is an educator and program coordinator for the Garden Hotline at Seattle Tilth (seattletilth.org).To comment on this column, write to