Need clean sand for bog garden. E-book mentioned cheap source. Where? Also, 7-inch diameter border rocks—will they heat soil and kill Darlingtonia? Drip system for aeration, raised area for no standing water.
Jeff Dallas: Home Depot/Lowes sell Sakrete play sand (good washed sand). Avoid Ross Island sand. Premium: sandblasting sand (pure silica) at Oregon Decorative Rock (website). They also carry pumice.
Rocks fine with drip system. Portland tap water okay; drippers can run during heat.
Good Growing!
Jeff Dallas
Sarracenia Northwest
https://www.cobraplant.com
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