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3

It's not a viable idea - the wood chips will gradually degrade and decompose over time, creating a layer of soil like material on top of the gravel just right for seeds to germinate and grow in. Not only that, assuming the gravel is not compacted into place with a machine or bound with resin, the two layers will not stay separate if there's a table and ...


2

Point one and two depend very much on the type of pebbles you use. The pH change should be negligible for most kinds of gravel isn't made from carbonate rock (like limestone). The temperature problem has two sides: first depending on their color the pebbles can draw heat which could be problematic for the roots. That would be a problem for dark gravel ...


2

White color makes it very likely to be mostly lime stone. The size looks like limestone "screenings" . When limestone is crushed certain size ranges are used for concrete ; so sizes are separated by screens . The angular shape also indicates a crushed material. This is size is too small for concrete and is essentially a by-product. Smaller "...


1

Don't use sand for the third layer, ants love it. A new home close to the surface but protected. Use stone dust which is crushed gravel and commonly available at outdoor supply stores. You can't easily do anything about the sub surface sand layer. A general rule of thumb is that the more effort you put into having a firm compacted base the better the ...


1

Assuming the pebbles you use are not limestone, there are two possible problems; first, if the plants are in full sun, stones, whatever type they are, get hot in sun and retain heat for longer, even after the sun has moved away. Second, one of the ways to monitor watering requirements is by the appearance of the soil on the top of the pot and by touching it -...


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I would just rake it level and put pavers down , looks like a good base. I have built two paver patios on essentially the native sand soil , no problems. I also built a 8 'X 12 ' garden shed putting house brick on native sandy soil , it has a heavy cabinet sitting on the brick and has not moved in 20 years .


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