Thank you for the replies! It has rained quite a bit since then. I looked into it, and the weed killer used was Ortho Weed B Gon MAX. The active ingredients are Quinclorac, 2,4 D and Dicamba. I'll be looking into this. It would save me a small fortune if I could use the ground. This post was edited by Kafei on Mon, Jan 14, 13 at 23:58

Contact your counties office of your state Agricultural Universities Cooperative Extension Service about having a good soil test done (usually in the $6.00 to $15.00 range). These simple soil tests, 1) Structure. From that soil sample put enough of the rest to make a 4 inch level in a clear 1 quart jar, with a tight fitting lid. Fill that jar with water and replace the lid, tightly. Shake the jar vigorously and then let it stand for 24 hours. Your soil will settle out according to soil particle size and weight. A good loam will have about 1-3/4 inch (about 45%) of sand on the bottom. about 1 inch (about 25%) of silt next, about 1 inch (25%) of clay above that, and about 1/4 inch (about 5%) of organic matter on the top. 2) Drainage. Dig a hole 1 foot square and 1 foot deep and fill that with water. After that water drains away refill the hole with more water and time how long it takes that to drain away. Anything less than 2 hours and your soil drains� too quickly and needs more organic matter to slow that drainage down. Anything over 6 hours and the soil drains too slowly and needs lots of organic matter to speed it up. 3) Tilth. Take a handful of your slightly damp soil and squeeze it tightly. When the pressure is released the soil should hold together in that clump, but when poked with a finger that clump should fall apart. 4) Smell. What does your soil smell like? A pleasant, rich earthy odor? Putrid, offensive, repugnant odor? The more organic matter in your soil the more active the soil bacteria will be and the nicer your soil will smell. 5) Life. How many earthworms per shovel full were there? 5 or more indicates a pretty healthy soil. Fewer than 5, according to the Natural Resources Conservation Service, indicates a soil that is not healthy. may be of some help in determining what you have. A good soil for plant growth will have between 5 and 8 percent organic matter.

Many kinds of maples are adapted to heavy soils and are planted in them by the thousands, as along streets for instance. It is the Japanese maple that is unusually touchy about drainage. If this planting site is big enough your best bet would be to excavate the clay soil and replace with lighter soil. If it is a narrow strip and the area becomes quite wet even that may not work, water coming in from the sides. Planting a tree or shrub over loosened soil is not a good idea because as the soils settles after planting the new specimen may sink to a level below the desired depth. Digging organic matter into a heavy soil will not have a lasting effect on the texture of the soil as the organic matter will gradually decompose and disappear. Even when non-decomposing amendments such as sand are used to alter the texture of backfill if the planting area is a small one there will still be the problem of how water moves into and out of the planting area being affected. Small areas of one soil texture surrounded by a much larger area of another are often a setup for problems. A large bed of soil amended with sand or similar material will also pose the problem of what to do when the dug over area rises up like a loaf of bread after the amendments are dug in - unless a soil already has a fairly high sand content a huge amount must be used to alter the texture of the finished bed significantly. If you can't excavate and replace a wide area of soil there or put a layer of more suitable soil over the top then it many just be that you can't safely plant Japanese maples in that particular spot. However, since you are in a fairly mild climate zone possibly it would be acceptable to plant them in suitably large tubs and place these on top of crushed rock or other covering in the same location.

There is no "right answer", it all depends on your personal preferences, your needs, and how much you want to spend. Keep in mind that in essence, a bed is any defined space holding a planting mix that differs significantly from the structure of the surrounding soil. Here are some options: Nothing at all: You don't *have* to have a side on your raised bed. Some folks just mound the soil up and use a hoe or rake to keep the edges relatively steep. This works best in places where flood action isn't likely to erode the beds with water running around them and there are not weeds or invasive grasses growing near the edge of the beds. Plus, it is really cheap, and can be lived with even in less than ideal circumstances until sides can be built later. Weedless Gardening by Lee Reich covers this approach. Sunken Beds:In keeping with the above, the raised part of building a bed is optional. Some desert locations use sunken beds to maximize water use. If you live in a hot, dry climate don't let the focus on reduced ground preparation distract from the advantages of a sunken bed. Though it is a lot of work to dig each sunken bed, screen out the caliche, and then add compost, etc. to the remaining soil, it is work that is only needed once per bed. The advantage of having a sunken bed that keeps water more easily combined with paths of undisturbed native soil can be well worth it in some climates. Untreated wood: Some people use thin strip of plywood with more solid corner stakes and simply replace their beds ever several years as the wood falls apart. Others have found that use of 2x lumber (either 2x8 or 2x12 or stacked 2x6s) lasts a very long time and is sturdy enough to bear weight even along the edges and resists mechanical injury from weed trimmers or wheelbarrows. Some staple heavy plastic to the inside of their wood sides to help keep moisture away from the boards and prolong their life. Use of a naturally decay resistant wood like cedar or redwood is both attractive and exceptionally durable, but considerably more expensive. Check the damaged wood section at lumber yards for big discounts. Landscape Timbers: They last almost forever even when in constant contact with moist ground. However, there is/was considerable debate about the CCA treated landscape timbers possibly leaching into the soil and being taken up by certain vegetables. A commonly recommended precaution is to placing a heavy-duty layer of plastic between the landscape timbers and the bed contents, which actually helps keep the wood dryer (thus lasting even longer) and prevented the preservatives from leaching directly into the soil. New wood preservatives are not supposed to be as dangerous, but using the plastic barrier method could not hurt... Plastic milk crates: Some have used plastic milk crates lined w/perforated cardboard & filled with soil as planters. They're great for growing carrots (24 to the crate). You can use them as edging for raised beds by arranging them in open rectangles that you then fill with soil. They form a sturdy, frugal & easily expanded raised bed system and container garden all in one. You can also use the wooden fruit crates that produce markets toss out. They only last a season or two (unlike the milk crates which may outlive us) but they work just as well. We do not recommend railroad ties: If there is enough creosote left in the tie to keep it preserved, there is enough to leach considerable quantities into the soil around it. The reason used RR ties can be bought cheaply is that throwing them away requires paying a hefty hazardous material fee. They are also a vector for transporting Formosan termites. If a railroad tie seems light compared to others that look fresher, most likely its middle portion has already been removed by some sort of wood destroying insect, and should not by purchased. The good ones do last forever and have a rustic look, but the plastic barrier method is not always sufficient to effectively stop creosote leaching. Masonry products: Durable, generally portable, and flexible, with a higher initial cost offset by permanency and other benefits. Existing or bought stone, cinderblocks, stacked or mortared bricks, or concrete paving materials all make a suitable bed edge. Cinderblocks can be moved or rearranged if a bed needs to be extended or relocated. For a classy permanent raised bed made from cinders or salvaged brick, it can be coated with a concrete based substance called hypertufa (See the Hypertufa forum here at GW for more information). Plastic bed edging: cheap shallow beds are a breeze to make using the generic black plastic bed edging materials. Especially useful if needing to make a raised bed around something, in tight locations, or to transition from a more formal planting into a vegetable patch tucked onto one end of a decorative garden. Rubber lumber made from old tires Fiber cement house siding boards (like Hardi-plank) or exterior fascia trim boards Plastic Mesh Corrugated tin Composite plastic/wood decking material (like Trex): it should work great-- but once you price it, you may decide to seek a cheaper option. Whatever you've got! Use your imagination and what is available-- then let us know if it works!