Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to grow kale indoors [title] Fill seed trays with a soil-less growing medium. [step] Purchase seeds trays for germination with drainage holes on the bottom. Fill each seed container in the tray with 3-4 inches of soil-less growing mix.

Ending1: Mist or sprinkle water over each container to moisten the mix. [substeps] Avoid using potting soil, which can clump up and hinder proper drainage of your plants. Ending2: You can also use a gel like fertilizer. [substeps] You can opt for organic matter such as pine bark or manure. Ending3: Set the trays on a level surface to catch any soil particles as they grow. [substeps] If you are growing kale indoors, cover each seed tray with a layer of compost. Ending4: Once the tray is full, close the lid and refrigerate in the refrigerator until the seeds are ready to begin sprouting. [title] Remove the trays when the seedlings have sprouted.

Answer format: ending1/ending2/ending3/ending4