PERENNIALS Lysimachia clethroides, Gooseneck TREES AND SHRUBS PLANTING & Loosestrife Mc, Mt !*Achillea millefolium, Yarrow D, Mc Lysimachia nummularia, Creeping Jenny !*Acer circinatum, Vine Maple D, Mc, Mt MAINTENANCE Aconitum camichaelii, Monkshood Mc, Mt Mc, Mt !Acer rubrum, Red Maple D, Mc, Mt, W *Adiantum sp., Maidenhair Fern Mt, W Lysimachia punctata Mc, Mt *Alnus rhombifolia, rubra, Alder Mt, W SITE AND SOIL PREPARATION: Alcea officinalis, Marsh Mallow Mt, W Matteuccia struthiopteris, Ostrich Fern Mc, Betula nigra, River Birch Mt, W Use the calculator at OSU’s website (see Amsonia tabernae-montana, Blue Star Mt Mt, W *Betula papyrifera, Paper Birch Mc, Mt, W references) to determine the size and depth !*Aquilegia formosa, Red Columbine Mc, *Mimulus guttatus, Monkey Flower Mt, W Clethra sp., Summersweet Mc, Mt, W of your rain garden. Amend the soil so the Mt, D Monarda didyma, Bee Balm Mc, Mt !*Cornus sericea, Red-Twig Dogwood D, mix is roughly 50% native soil, 30% !*Arctostaphylos uva-ursi, Bearberry D, Mc Myosotis palustris, Forget-Me-Not Mc, Mt Mc, Mt, W compost, and 20% pumice. !*Aruncus dioicus, Goat’s Beard Mc, Mt Osmunda sp., Cinnamon Fern Mt, W Fraxinus americana, White Ash Mc, Mt, W Asclepias incarnata, Butterfly Weed Mt, W !Penstemon digitalis Mc, Mt Magnolia virginiana, Sweetbay Mc, Mt, W MULCHING: Two kinds of mulch are *Aster sp. D, Mc, Mt !*Penstemon globosus Mc, Mt !*Mahonia sp., Oregon Grape D, Mc important in a rain garden. A mulch of pea Astilbe cvs. Mc, Mt !*Penstemon (Oregon natives) D, Mc !*Malus, Crabapple D, Mc gravel or river rocks at the point where Boltonia asteroides, False Starwort Mt, W Physostegia virginiana, Obedient Plant Mc, !*Philadelphus lewisii, Mock Orange D, Mc, water enters will help prevent erosion; this !*Camassia D, Mc Mt Mt mulch should be thick enough that no soil Campanula, Bellflower D, Mc, Mt !*Polystichum munitum, Sword Fern Mc, Mt !*Physocarpus capitatus, Pacific Ninebark D, shows through. The rest of the rain garden (varies by species) Pontederia cordata, Pickerel W Mc, Mt, W should have compost 1-3” deep added once Canna sp. Mc, Mt, W Primula sp., Primrose Mc, Mt, W (varies) *Populus tremuloides, Aspen Mc, Mt, W a year as spring rains taper off in June. This Chelone, Turtle Head Mt, W *Saggitaria latifolia, Arrowhead W *Rhamnus purshiana, Cascara Mc, Mt will help suppress weeds and maintain *Dicentra formosa, Pacific Bleeding Heart Salvia uliginosa, Bog Sage Mt, W !*Ribes sanguinium, Flowering Currant D, moisture levels during dry periods. Mc, Mt, W !*Sisyrinchium californicum, Yellow Eyed Mc, Mt !Echinacea purpurea, Coneflower D, Mc, Mt Grass Mc, Mt, W *Rosa nutkana, Nootka Rose Mc, Mt WATERING: All plants (even drought Eupatorium perfoliata Mt, W !*Sisyrinchium douglasii, Blue Eyed Grass *Rosa pisocarpa, Swamp Rose Mt, W tolerant ones) will need supplemental water Eupatorium purpurea Mt, W D, Mc, Mt *Salix sp., Willow Mc, Mt, W in the first 1-2 years until they are well Filipendula sp. Mt !*Smilacina racemosa, False Solomon’s *Spiraea sp. D, Mc, Mt, W (varies) established. !Fragaria virginiana D, Mc Seal Mc, Mt Taxodium sp., Bald Cypress Mt, W !Geum, Avens D, Mc, Mt Tradescantia cvs., Spiderwort Mt !Vaccinium ovatum, Evergreen Huckleberry D, FERTILIZER AND PESTICIDES: !Hemerocallis, Day Lily D, Mc, Mt, W Tricyrtis hirta, Toad Lily Mc, Mt Mc These should both be avoided in your rain Hibiscus moscheutos, Rose Mallow Mt, W !*Trillium ovatum, Wake Robin D, Mc, Mt Vaccinium Macrocarpon, Cranberry Mc, Mt, W garden whenever possible; part of the goal Hosta sp. D, Mc, Mt (varies) Veronica longifolia, Speedwell Mc, Mt is to help keep these things out of local Iris ensata, japonica, Japanese Iris Mc, Mt, W waterways. If necessary, use granular, low GRASSES phosphorous, organic fertilizer, and the !*Iris tenax, Oregon Iris D, Mc, Mt, W KEY !Liatris spicata, Gayfeather Mc, Mt D Dry Zone Acorus sp., Sweet Flag Mc, Mt, W least toxic pesticide available. Consider replacing plants which are repeatedly !Leucojum aestivum, Summer Snowflake Mc Mesic Zone Carex muskingumenis, Palm Sedge Mc, Mt Mc, Mt Mt Moist Zone Carex nigra, Black Sedge Mt, W susceptible. Ligularia sp. Mt W Wet Zone Carex obnupta, Slough Sedge Mt, W

Lobelia cardinalis, siphilitica Cardinal * NW Native *Deschampsia cespitosa, Hair Grass Mc, Mt

Flower Mc, Mt, W ! Drought Tolerant *Juncus sp., Rush Mc, Mt, W

Grey Tolerates Shade !Miscanthus sinensis, Maiden Grass D, Mc

DEFINITIONS RESOURCES CATEGORIZING Rain Gardens A Rain Garden is a planted Books: PLANTS depression where run-off from roofs,  Rain Gardens: Managing water sustainably in and Rain garden plants must be able to driveways and other surfaces is the garden and designed landscape tolerate periods of drought and flooding, directed so that it can soak back into Nigel Dunnett and Andy Clayden – especially in the Northwest. Few plants can the soil naturally rather than run into general discussion of water and waterside tolerate all the different conditions found in a storm drains. The soil and plants in plants in the garden, plus a big plant list Bioswales rain garden, so the following plants will be these areas filter out some impurities divided into 4 different categories. before the water drains into sewers,  Plants of the Pacific Northwest Coast groundwater, rivers and streams. Jim Pojar and Andy MacKinnon – Introduction and Dry – The top of the rain garden where northwest native plants, not specific to floodwaters never reach. Drainage here is good because it’s at the top of a slope. A Bioswale is a linear depression that rain garden or swale use Recommended Plants directs the flow of water while letting it Please see the Drought Tolerant handout percolate into the soil.  Tree Maintenance for more plant suggestions for this area.

Pirone, Hartman, Sall, and Pirone – Mesic – This level, just below the dry zone, includes a valuable list of shade trees experiences occasional, brief winter that survived a 10-day, 15” deep flood. RAIN GARDEN flooding and summer drought.

LOCATION Websites: Moist – The zone approaching the bottom  www.raingardens.org of the rain garden experiences frequent Choose a spot where water can be winter flooding. The number of plants that easily directed through the landscape or  OSU Rain Garden Guide can grow here without summer water is from downspouts. Make sure to leave at www.seagrant.oregonstate, limited. least 6 feet from your house, and allow edu/sgpubs/onlinepubs/10001.pdf Wet – The bottom of the swale will be for overflow away from foundations and saturated for a large portion of the year; other structures.  Portland Bureau of Environmental water plants can be grown here if Services – get a discount off your waste supplemental water is given in the summer. (For specific information on existing water bill when you build a rain garden. Without summer irrigation, fewer plants structures and Rain Gardens and www.portlandonline.com/bes can grow here. Bioswales please consult the resources on the back of this  East Multnomah Soil and Water Conservation Department brochure) www.emswcd.org/raingarden