Environmental reasons for NOT spraying with chemicals
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Is is environmentally irresponsible to plant non-native plants?
Comments (62)Lacebark, Inc., P.O. Box 2383. Stillwater, OK 74076 Much has been written in recent years about the need to plant only "native" species. But the key questions are often overlooked. Is a plant best adapted to where it is "native"? Once urban soils have become homogenized and modified with all sorts of construction debris, is any plant "native" to that site? Are all introduced species "bad"? Shouldnt adaptation of a plant to a site or region be considered instead of just "native" vs. exotic? Just because a plant is "native" to an area, does that mean that the location/conditions are where is grows best? All these are questions that need to be considered. Our focus should be on plants adapted to a site and with acceptable "manners" relative to the desired purpose. The plant that grows best on a site may or may not be the most desirable and it may be a native or it may be an exotic. In many instances I feel requirement is often confused with tolerance. For example, my research that created the micronutrient fertilizer, Micromax, was done with tomato and pyracantha only. That was in 1978. Micromax has been the number 1 selling micronutrient fertilizer in the world for years. How can it be that research data from one vegetable and one woody shrub relates to thousands of species worldwide? I believe it is because all or nearly all plants have the same requirement for optimum micronutrient nutrition. To study this question I have grown an array of species of plants with a wide array of micronutrient levels. Azaleas were dark green and thrived in a narrow band of micronutrient levels. The same was true for African violet and blueberry. On the other hand, juniper, arborvitae, marigold, and crabgrass were green and attractive over a huge range of micronutrient levels, hundreds of times wider than for the azalea. BUT all of the test species grew best with the same level and combination. These data support the view that plants have vastly different degrees of tolerance, yet for optimum growth, about the same requirement. Now consider the initial questions raised: Is a plant best adapted to where it is native? If a plant grows faster, produces more flowers and seeds which germinate readily and establish new plants more rapidly in a new location vs. where it is native to which site is it best adapted? The new location of course! This is exactly the situation with the Melaluca leucadendron or punk tree in south Florida vs. its native habitat of Australia. In its native range in Australia, it is not an aggressive, invasive tree. A striking reverse situation exists with Pinus radiata, Monterey pine, native to the California coast where it grows at a moderate pace and is not especially vigorous. Yet in New Zealand and South Australia, Monterey pine grows vigorously and creates magnificent timber. A study of fossils reveals that many plants were "native" to locations far removed from were they are currently "native". Conditions change and with the change plant species shift or adapt. Just because a plant is "native" to a site does not necessarily mean that site and conditions are optimum for its growth. Once urban soils have become homogenized and modified with construction debris is any plant "native" to that site? No, other than crabgrass and then only because it has, perhaps, the widest tolerance of all species. On the other hand, many species have such a wide tolerance that they can grow reasonably well under such adversity. For example, southern wax myrtle, Myrica cerifera, is native over a wide range of conditions throughout the southeast USA. It is native to the almost pure sand soils of the Ocala National Forest in north central Florida, to stream banks where flooding frequently occurs, to alkaline soils along limestone outcroppings and acid soils along the swamps of southern Georgia. This is a species with a huge tolerance for growing conditions, and it does well in nearly all urban conditions. In order to have successful plantings on highly disturbed urban sites, we must look to plants with a wide range of tolerance. Along with wax myrtle, one of the most tolerant and adaptable shrub species that works well is Nandina domestica, native to China. Nandina would be at the very top of my list of broadleaf evergreen shrubs with many attractive qualities and good mannersÂnative or non-native. Nandina has attractive foliage, flowers, and fruits, is nearly disease- and insect-free, produces few invasive seedlings or rhizomes, is easy to maintain, and grows well in a huge range of conditions. Are all introduced species "bad"? Absolutely not. Nandina, lacebark elm, Chinese pistache, Pittosporum tobira, and on and on are introduced species that are well adapted to much of North America that have good manners and make good "citizens". On the other hand, melaluca, tree of heaven, Japanese honeysuckle, kudzu vine, and many other species are too well adapted: grow too vigorously and reproduce too freely so as to be undesirable in the view of current day society. The bottom line is that just because a plant is growing "native" under certain conditions, does not mean that it is at its peak or optimum. It simply means that it is able to tolerate the current conditions and survive. Further, relative to the evolution of the species and the changing local site conditions or site conditions of a much larger region, the species may be relatively "new" and will become more vigorous and aggressive in the future as conditions become more favorable or it may be on its way out because it has reached its limits of tolerance and will eventually become extinct. At this point in time no one knows. However, we get a "feel" for the answer from various experiences. Because of the positive plant response and adaptation to such an array of conditions, southern wax myrtle appears to be still expanding its "native" environment. On the other hand, black cherry, Prunus serrotina, appears to be less and less tolerant to environmental conditions and may become extinct in another century or two. In my view, it would be simplistic and foolish to plant only natives. Likewise, it would be foolish to plant only introduced species. Our focus should be on species adapted to the site and with acceptable manners regardless of where they happen to be "native at a particular time in the glob al picture. ------------ -------------------------------------------------------------------------------------------------------------------- Carl Whitcomb is author of ÂKnow It and Grow It: a guide to the identification and use of landscape plantsÂ, 820 pages, 8.5 by 11 format, hard cover, over 2000 black and white photos of most of the woody plants, native and exotic, that can be grown east of the Rocky Mtns. $60.00 + shipping. Also, ÂEstablishment and Maintenance of Landscape PlantsÂ, 630 pages, 6 by 9 format, hard cover and many photos. $35.00 + shipping. Phone 405-377-3539 or Fax 405-377-0131....See MoreEnvironmentally friendly hydrangea bluing
Comments (2)To elaborate just a bit on yg's comment.....:-) It is the aluminum content in the soil that results in the blue flowers and unless the soil is sufficiently acidic, the aluminium is bound up and not accessible to the plant roots. You can attempt to alter pH to make the soil more acidic and there are several organic methods for attempting this - cottonseed meal, peat moss, agricultural sulphur - but the effect will be temporary at best and the product will need to be reapplied frequently. Same with aluminum sulfate or what is commonly sold as "hydrangea bluing" - it is a naturally occuring chemical compound but will need to applied repeatedly and you do run the risk of rather easily creating aluminum toxicity with frequent applications. If your indigenous soils are not conducive (too high a pH) to developing blue hydrangea flowers, you will get the best results from growing them in containers where you can more easily control soil conditions and pH....See MoreEnvironmentally Friendly Counters & Soapstone
Comments (28)This can be done. There are a few things to consider when thinking about taking on a project like this, such as if slate is the right material for you. From there you should explore the type of slate in the pool table you are considering for use. There are basically two types of pool table slate, single slate pool tables and 3 piece slate pool tables. This will lead to further considerations such as taking in to account exact countertop sizes. We did an outside bar with repurposed pool type slate that worked well. The process of making the reclaimed slate work as a countertop was not difficult. If this is not a project you want to take on finding a fabricator may be a little challenging but can definitely done. I have included a few links for you below that you may want to look at. http://greeneprojects.wordpress.com/tag/slate/ http://www.oregonlive.com/hg/index.ssf/2009/01/two_foodies_wait_to_stumble_ov.html http://esterrepublic.blogspot.com/2008/08/as-promised-black-slate-countertop.html...See MoreEnvironmentally Friendly Area Rugs
Comments (2)just curious, what did you decide on? Looking for same thing...See Morestrawchicago z5
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