Joined: July 2004
||Posted: 08 April 2018,10:10
If there's tumbleweed, then it usually suggests you've not explained the problem adequately.
To my eye, there isn't the sort of height difference across the garden to warrant the use of upright sleepers, so I'd look to use the siompest possible rtainer, possibly a dwarf wall, or, as you suggested, simple gravel boards. Gabions could be even simpler.
As for drainage, that would all depend on your final layout. You need to detrmine where drainage points would be, or whether linear drainage or even a fin/fliter drain would be a better option.
Start with a plan....everything flows from that.
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