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Garden Invaders - Recognizing and Removing Invasive Plants
The document provides an overview of strategies for managing garden invaders, including invasive weeds and pests, while promoting healthy gardening practices. It covers identification, control methods, and the importance of maintaining soil health through prevention and proper disposal techniques. Resources are provided for further information on weed identification and management in gardening.
Garden Invaders - Recognizing and Removing Invasive Plants
- 1. January 2012 © Independence Gardens LLC Garden Invaders Independence Gardens Portland, OR Download the handout that goes along with this slideshow! h p://bit.ly/AgInWs Tuesday, January 31, 2012
- 2. What We’ll CoverToday Intro we are Independence Gardens • We build raised beds, chicken coops, terraces, trellises, & other garden infrastructure • Help with garden design & planning, cleanup, prep, and installation • Teach edible gardening classes • & make Doo Tees! Tuesday, January 31, 2012
- 3. What We’ll CoverToday Preview Topics We’ll Cover Got Questions? • Top four baddie invaders Please ask as we go along. • Weeds: invasive, noxious, or just annoying? • Other garden invaders • Recommended prevention. control, & disposal methods • Resources • Take-home message Tuesday, January 31, 2012
- 4. And Some OtherOptions Our “favorite” garden invaders Himalayan blackberry English ivy Bu er y bush Field bindweed Why are these “favorites”? Because we don’t feel particularly con icted about removing them... Tuesday, January 31, 2012
- 5. And Some Otherblackberry Control for Options • Manual removal of canes • Manual removal of rootballs • Mow (or use goats) to prevent foliage regrowth Tuesday, January 31, 2012
- 6. And Some Otherfor ivy Control Options • Remove foliage, vines, and roots manually • Cut all vines that run up trees at base of tree - Ivy owers and fruits on vertical growth, so focus on ge ing rid of it • Use goats to help keep foliage from growing back Tuesday, January 31, 2012
- 7. And Some OtherOptions Control for bu er y bush • Intervene before it goes to seed... • “One-cut pruning” • Remove stumps manually (or get help...) Tuesday, January 31, 2012
- 8. And Some Otherbindweed Control for Options • Remove vines • Reproduction occurs by rhizome, so try not to leave pieces • Solarize • Apply thick sheet mulch • Monitor (esp. edges) Tuesday, January 31, 2012
- 9. And Some OtherOptions Weeds that aren’t so bad White clover Trifolium repens Li le western bi ercress Cardamine oligosperma Plantain Plantago major Chickweed Red deadne le Dandelion Stellaria media Lamium purpureum Taraxacum officinale Tuesday, January 31, 2012
- 10. Why Compost?difference? What’s the • Good weeds a ract bene cial insects, give clues about our soil quality, add nutrients to our gardens, and feed us • By de nition, invasive weeds are non-native & were introduced here; they tend to be aggressive competitors for space & resources • Noxious weeds have a negative economic impact and are regulated by federal & state governments • We focus on removing invasives and noxious weeds, and tend not to worry as much about the others... Tuesday, January 31, 2012
- 11. Why Compost? Parallel invaders: Pests • Similar to weeds, pest invaders require: - Positive identi cation - Familiarity with method of reproduction/spread - Properly timed intervention - Effective use of deterrents - Responsible use of -cides Tuesday, January 31, 2012
- 12. Why Compost? “Oopsies” Parallel invaders: • Oopsies = plants that have reproduced without your permission • Similar to other weeds, “oopsies” require you to - Notice early - Observe functions/let them serve those f ’ns if appropriate (e.g. pollinator a ractors) - Remove ASAP Tuesday, January 31, 2012
- 13. Why An ounceof prevention... Compost? • “Being there” - Observation, then intervention • Focusing on maintaining soil health and encouraging desired plants’ growth • Watering YOUR plants, not the whole garden area Tuesday, January 31, 2012
- 14. Why Prevention: Raisedbeds Compost? • Effective barrier to weeds that spread by rhizome • Loose soil makes weeds easy to pull out • Still have to monitor for oopsies and bird- dropped/wind- blown seeds Tuesday, January 31, 2012
- 15. Why Compost? crops& mulch Prevention: Cover • Nature abhors a vacuum (and bare soil, too) • Cover crops are noninvasive/non- irritating competitors • Mulches smother weeds/prevent photosynthesis Tuesday, January 31, 2012
- 16. Why Compost? Hoes! Removal: • Plants can’t make food if foliage is disconnected from roots • Use the hoe to cut the plant just below the soil surface • Adjust blade angle so you don’t have to bend to use it Tuesday, January 31, 2012
- 17. Why Compost? Removal: Other tools • Hand pruners • Loppers • Saws • Machetes • Hori-horis • Lawnmowers • Fire: don’t (just) play with it! Tuesday, January 31, 2012
- 18. Why Compost? Disposal • Commercial composting (pu ing it out in your yard debris roll-cart) is the best bet • Non-noxious weeds that have not gone to seed can be composted in a backyard system • If you do use chemicals, don’t assume safety Tuesday, January 31, 2012
- 19. A note onherbicides • Please...avoid weed & feed & other non-speci c products • Follow IPM hierarchy (chemical control comes in dead last) • Look for pre- and post-emergent control products that are OMRI- listed, if possible • ALWAYS read the label and ALWAYS follow instructions • Wear your PPE! Tuesday, January 31, 2012
- 20. Common pitfalls • Time constraints • Lack of consistency • Discomfort with eliminating living things • Improper technique • Trying to eliminate ALL weeds Tuesday, January 31, 2012
- 21. Take-home message • Some weeds are way worse than others • Your involvement is key • Include others in your garden routine if at all possible • Don’t let a problem become a Problem • It’s OK to ask for help Tuesday, January 31, 2012
- 22. Resources Do this! • Oregon noxious weeds lists: h p://www.oregon.gov/ODA/ PLANT/WEEDS/ statelist2.shtml • Weed identi cation: h p:// mint.ippc.orst.edu/ weedidenti cation.htm • Paci c Northwest’s Least Wanted List: extension.oregonstate.edu/ catalog/pdf/ec/ec1563.pdf Not this. Tuesday, January 31, 2012
- 23. Got Questions? Tuesday, January31, 2012