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Finally, my experimental tulips of the Red Shine variety, which were planted in different types of soil, have bloomed. A total of 9 samples, 5 pieces in each pot. And so, the results: starting from the end 9) cat litter (the most deplorable result) 8) fresh sawdust (should be rotted) 7) peat 6) last year's soil (sawdust with peat) 5) sawdust with humus 4) sand 3) coconut substrate 2) humus with sand 1) universal soil from the store.