View full sizePond fish eat the eggs of amphibians, such as this northern Pacific treefrog.Gardeners add ponds to their yards for all kinds of reasons: to create an attractive focal point, to block out noise from neighbors or traffic, to raise koi, to attract wildlife, etc. If you're planning a pond for wildlife, the Oregon State University Extension Service has some information to help you. For instance, many types of pond liners are not appropriate for wildlife; preformed liners tend to be too steep and hazardous for wildlife, while other liners may leach out chemicals harmful to wildlife. The best kind is flexible PVC liner made specifically for ponds or labeled "fish-friendly.
Also keep in mind that stocking a pond with fish limits the kinds of wildlife you can attract, since they eat the eggs and larvae of amphibians, dragonflies and other aquatic species. Use Mosquito Dunks to control mosquitoes if you opt to go fish-less.
Before you dig, you need to do some planning to choose a good site, and consider where the pond will drain when it overflows from rain (or must be emptied for repairs), where utility lines and tree roots are located, and how high the winter water table rises. Also, ponds built under trees tend to collect a lot of leaves, which can make the water too acidic for some aquatic species.
See
for more essential info.
Another great resource is
for help, classes, plants and supplies, as well as inspiration from the display gardens. You might want to visit there during the
from July 22 to July 31 to enjoy the artwork while you pick up ideas for your pond. The opening gala from 6:30 to 8:30 p.m. July 22 includes a viewing of night-blooming tropical waterlilies -- truly an impressive sight. Check the website for information on events. All are free.
-- Homes & Gardens staff
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