premise: How to grow kale indoors<br>Fill seed trays with a soil-less growing medium. 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.
hypothesis: Germination is necessary for the growth of green vegetables indoors, but it needs soil mix and seed stray with drainage holes.
reason: Germination is necessary for plant growths but not necessary it needs a soil mix and stray with drainage holes.