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I live near the beach in Southern California and am planting succulents outside in the ground. What are your thoughts on using high sand-content soil versus the succulent soil for containers?
Coarse sand can be used in succulent soil recipes (you can see my favorite one here), but it should not be the primary ingredient. Even when planting succulents in the ground, you have to be aware of the drainage. Sand doesn’t retain a lot of water, but the roots of succulents do need some time to soak up water before it all dries out.
Beach sand is generally too heavy and dense for succulents. It drains well, but the roots may still suffocate in the sand, so be sure to use coarse sand instead.