Please choose the correct ending to complete the given sentence: Youth: [header] How to grow saguaro cactus [title] Select a container for your saguaro cactus seeds. [step] Choose a small-to medium-sized plastic planting pot with drainage holes. [title] Mix soil and fill the pot.

Ending1: [step] Close the lid and shake the cactus pot; mix the contents of the pot with a spoon until you have made a mound about the size of the cactus you are planting. [title] Plant the saguaro cactus into the soil. Ending2: [step] Pour water into the container until it covers the roots. [substeps] Make sure you do not fill the roots more than 6 inches (15 cm) up. Ending3: [step] Add a thin layer of compost, and sprinkle several handfuls of seed. Space your seed cuttings 1-2 inches (2.5-5.1 cm) deep. Ending4: [step] Saguaro, like other cacti, need extremely loose, loamy and coarse soil that is free of organic fertilizers like manure. [substeps] Combine 1-part each of sand, peat moss, turf soil and garden loam.

Answer format: ending1/ending2/ending3/ending4