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FYI: X-, XX-, and XXX-Rated Plants
X-, XX-, and XXX-Rated Plants
Nothing risqué going on here‹the ³X² stands for Xeriscape low-water gardening. Garden Centers of Colorado recently began rating ornamental plants according to their typical water use rates: X = around 1" of water per week (³thrives in slightly dry conditions²), XX = around 0.5" of water per week (³thrives in dry conditions²), and XXX = around 0.5" or less of water every two weeks (³thrives in very dry conditions²). Here are the water use ratings of annuals and perennials listed on the GCC web site http://www.xratedgardening.com. Annuals XXX-rated: Centaurea cyanus (cornflower), Eschschozia california (California poppy), Portulaca grandiflora (rose moss), Salvia greggii (autumn sage), Verbena bonariensis (purple top), Zinnia angustifolia (star zinnia) XX-rated: Catharanthus roseus (Madagascar periwinkle), Cleome hassleriana (spider flower), Coreopsis tinctoria (coreopsis), Cosmos bipinnatus (cosmos), Diascia barberae (twinspur), Gazania rigens (treasure flower), Gomphrena globosa (globe amaranth); Ipomoea batatas (sweet potato vine), Lantana hybrids (lantanas), Limonium sinuatum (statice), Melampodium leucanthum (black foot daisy), Mirabilis jalapa (four o¹clock), Nierembergia hippomanica (cup flower), Pennisetum setaceum (fountain grass), Petunia hybrids (petunias), Rudbeckia hirta (black-eyed Susan), Salvia farinacea (mealycup sage, Victoria types), Sanvitalia procumbens (creeping zinnia), Scaevola aemula (fan flower), Senecio cineraria (dusty miller), Tagetes species (marigolds), Thymophylla tenuiloba (Dahlberg daisy), Tithonia rotundifolia (Mexican sunflower), Verbena hybrids (trailing verbenas) X-rated: Argyranthemum species (marguerite daisies), Brachycome iberidifolia (Swan River daisy), Celosia plumose (cockscomb), Dianthus species (pinks), Heliotrope species (heliotropes), Osteospermum species (African daisies), Sutera cordata (bacopa), Tropaeolum majus (nasturtium), Viola species (violas), Viola € wittrockiana (pansy), Zinnia hybrids (zinnias) Perennials XXX-rated: Anacyclis pyrethrum var. depressus (Mt. Atlas daisy), Antennaria species (pussy-toes), Artemisia frigida (fringed sage), Asclepias tuberosa (butterfly weed), Berlandiera lyrata (chocolate flower), Callirhoë involucrata (poppy mallow), Calylophus serrulaus (sundrops), Centranthus ruber (Jupiter¹s beard), Echinops ritro (globe thistle), Eriogonum species (sulfur flowers), Eryngium amethystinum (sea holly), Euphorbia polychroma (cushion spurge), Gaillardia plicatus (blanket flower), Gaura lindheimeri (whirling butterflies), Goniolimon species (statices), Limonium species (statices), Linum perenne (blue flax), Mirabilis multiflora (hardy four o¹clock), Oenothera species (evening primroses), Penstemon species (most penstemons), Perovskia atriplicifolia (Russian sage), Ratibida columnifera (prairie coneflower), Tanacetum densum var. amani (partridge feather), Zauschneria garrettii (California fuchsia), Zinnia grandiflora (golden paper flower), hardy cactus species XX-rated: Achillea species (yarrows), Agastache species (hyssops), Alcea species (hollyhocks), Alyssum montanum (mountain gold), Anchusa species (buglosses), Anthemis tinctoria (chamomile), Arabis caucasica (rock cress), Arenaria species (sandworts), Armeria maritima (sea pink), Artemisia species (white sages), Aster species (asters), Aurinia saxatilis (basket of gold), Baptisia australis (blue false indigo), Belamcanda chinensis (blackberry lily), Boltonia asteroides (starflower), Brunnera macrophylla (Siberian forget-me-not), Centaurea montana (perennial cornflower), Ceratostigma plumbaginoides (leadwort), Delosperma species (ice plants), Dendranthema € grandiflorum (garden mum), Dianthus species (pinks), Diascia integerrima ŒCoral Canyon¹ (twinspur), Erigeron species (fleabanes), Gazania species (gazanias), Geum species (geums), Gypsophila species (baby¹s breaths), Helianthemum nummularium (sun rose), Heliopsis helianthoides (false sunflower), Hemerocallis species (daylilies), Iris germanica (bearded iris), Knautia macedonia (red pincushion), Kniphotia uvaria (red hot poker), Lavandula angustifolia (English lavender), Lavatera thuringiaca (tree mallow), Lychnis coronaria (rose campion), Malva alcea (rose mallow), Nepeta x faassenii (catmint), Origanum species (oreganos and marjorams), Osteospermum barberiae var. compactum (sun daisy), Paeonia lactifloa (peony), Papaver species (poppies), Phlomis cashmeriana (Jerusalem sage), Phlox subulata (moss phlox), Platycodon grandiflorus (balloon flower), Polemonium caeruleum (Jacob¹s ladder), Polygonum affine (Himalayan border jewel), Potentilla species (cinquefoils), Pulsatilla vulgaris (Pasque flower), Rudbeckia species (black-eyed Susans), Salvia argentea (silver sage), Salvia species (salvias), Santolina species (lavender cottons), Scabiosa species (pincushions), Sedum species (stonecrops), Sempervivum species (hens-and-chicks), Solidago species (goldenrods), Stachys plumbaginoides (lamb¹s ears), Tanacetum niveum (snow daisy), Thymus species (creeping thyme), Veronica species (speedwells) X-rated: Ajuga reptans (bugleweed), Alchemilla mollis (lady¹s mantle), Amsonia hubrichtii (blue star), Anemone species (windflowers), Aquilegia species (columbines), Bergenia cordifolia (pigsqueak), Campanula species (bellflowers), Coreopsis species (tickseeds), Delphinium species (delphiniums), Digitalis species (foxgloves), Echinacea purpurea (purple coneflower), Epilobium species (fireweeds), Euonymus fortunei ŒColoratus¹ (purple-leaved wintercreeper), Galium odoratum (sweet woodruff), Geranium species (geraniums), Hedera helix (English ivy), Helenium autumnale (sneezeweed), Helleborus species (Lenten roses), Heuchera species (coral bells), Hosta species (plaintain lilies), Hypericum calycinum (St. John¹s wort), Iberis sempervirens (candytuft), Lamium galeobdolon (yellow archangel), Lamium maculatum (dead nettle), Leontopodium alpinum (edelweiss), Leucanthemum x superbum (Shasta daisy), Liatris species (gayfeathers), Lychnis chalcedonica (Maltese cross), Prunella laciniata (self heal), Pulmonaria species (lungworts), Saponaria species (soapworts), Tanacetum coccineum (painted daisy), Tradescantia species (spiderworts), Verbena canadensis (rose vervain), Vinca species (myrtles and periwinkles), Viola corsica (Corsican violet), Waldsteinia ternata (barren strawberry) ----------------------------------------------------------------------- Reprinted with permission from the March 2003 _HortIdeas_. Copyright 2003 by Greg and Pat Williams. HORTIDEAS (ISSN 0742-8219) is published monthly by Gregory and Patricia Y. Williams, 750 Black Lick Road, Gravel Switch, KY 40328 U.S.A. Annual subscription rates: U.S., $25.00 periodicals or $27.00 first class; Canada and Mexico, $32.00; Overseas, $30.00 surface mail or $42.00 air mail. Single issues: North America, $2.50 each; Overseas, $3.00 each, surface mail, or $4.00 each, air mail. The email address for HORTIDEAS is: . _HortIdeas_ is now on the world wide web at http://www.users.mis.net/~gwill/hi-index.htm -- Bob Batson "Eagles may soar, but weasels don't get sucked into jet engines" |
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