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How to grow saguaro cactus
Select a container for your saguaro cactus seeds.
Choose a small-to medium-sized plastic planting pot with drainage holes.
Mix soil and fill the pot.
Saguaro, like other cacti, need extremely loose, loamy and coarse soil that is free of organic fertilizers like manure. Combine 1-part each of sand, peat moss, turf soil and garden loam.