I am currently preparing for new Empire Zoysia sod. After many failed attempts at gardening in this Florida sand I decided to go "all out" and see if topsoil will work.
The soil here has several problems. It is "sugar sand", water does not soak in, it is full of tree roots and shade everywhere from 14 oak trees. Florida has watering restrictions most of the time and restrictions on fertilizers during the "rainy season" (summer). The neighbors here also have an expectation for a lawn, rather than gravel or cactus gardens. I'm going to strangle the next person who tells me to add lime, fertilizer, and water. I have done ALL of that. I had a very green, very fast growing (mostly weeds) lawn last year, and this year at the end of March I couldn't hardly find evidence of last year's St. Augustine. And so... I am re-doing the "front yard" just a small section of the property.
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| 12 yards of topsoil (after some was moved around) |
The cost of the topsoil was $20 per cubic yard plus $30 delivery, $286.80 with tax for that big hill of dark soil. It should be enough to lay two pallets of sod.
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| Changing the grade, to reduce runoff |
Because I have the oak trees, and the oak tree roots, I can't roto-till. It isn't really okay to add dirt on top of oak tree roots but I feel that it isn't reasonable to live with an ugly yard either. I am raising the edges of this area with topsoil and sod so that rain water will not run off into the sidewalk, and I am sprinkling just a light top-dressing near the trunk of the tree where the ground is higher. I might try to grow some kind of ground cover in that St. Augustine area later. I want to get some large pots with impatiens flowers for the base of the tree.
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| Before TopSoil |
I drilled holes in the sand with a huge masonry bit all over this area before the soil delivery. This will create drainage through the tree roots and allow the topsoil to get down into the sand a little bit. It also provides some aeration. I didn't remove any of the grass or weeds, I put the new soil right over whatever was there. It isn't possible to remove anything without digging up tree roots, and it is very difficult to dig at all.
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| Roto-Tilling is SO wonderful. I hope this will work. |
There are machines that pull out plugs to aerate soil, but those also damage tree roots. In theory, I think that the holes I have drilled will do the tree more good than harm. There is only one large water oak in the area where I am installing new soil and grass, and the roots are all near the surface. With the new grading, drainage holes, and good topsoil I think that (in theory) I can get more moisture deep into the soil, and the tree roots can go deeper. I'm not sure if they will.
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| It is very hard to show how the yard sloped |
This area is about 40 feet wide by 50 feet deep (2000 square feet), with the base of the tree trunk much higher than the rest of the area. I placed a 2x6 board at the corner to protect my baby palm tree from getting buried. It is a Bismarck Palm, and they don't like to be transplanted. It is the ONLY thing I planted here that is doing well, so I'm not messing with it. My plan is to build somewhat of a berm covered in new sod along the sidewalk edge of the area. In the photo the ground is nearly level now, before the topsoil has been compacted. When I am finished, the base of the tree trunk will actually be below the level of the sod at the edges of the area. This way, the more attractive Zoysia grass that grows in the sunny area will be visible from a distance, with the less attractive shaded area partially blocked from view. Obviously, you will still see the inner yard from up close, but it should look nice from across the street.
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| Lawn Starter Fertilizer |
I will be using Super Bloom as my lawn starter fertilizer. It is 12% Nitrogen, 55% Potash (for root development) and 6% Potassium. I'll apply it with a hose end sprayer. It seems to me to be even better than the lawn starters, because of the lower nitrogen. I'll get some 10-10-10 lawn fertilizer to apply after the first month, and then the fertilizer restrictions go into effect.
I am hoping that this little project will give the look of some "landscaping" for under $1,000, and hopefully I won't kill the tree in the process. If it goes well, then I will tackle more small areas later.