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Using soil used for cat toilet
We have just moved into a new house and want to start doing up the garden. There is a small trough of soil (see picture) which was used by the previous tenant for Cat Grass for their cat and I think the cat also used as a toilet. I was thinking of taking it apart and decanting the soil into big pots to start growing plants in but a friend said the soil could be toxic because of the cat faeces.
Would anyone know if the soil is usable?
Would anyone know if the soil is usable?

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I would not bother reusing the soil in pots. The disease risk I would deem to be very slight but cats’ urine might have made it quite acidic. Then there will be weed seeds and possibly limited fertility. I would use compost specific for the purpose in your pots. The retaining boards on that raised bed are terribly thin. It would not surprise me if they disintegrate on dismantling due to the seepage of damp into the wood.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.