There are several important things to keep in mind when propagating Corn Plant cuttings. First, start them out in small pots filled with a very porous, peat-based potting mix. Fragile developing roots require some moisture and also oxygen to develop. Large pots and heavy soils tend to stay wet for too long and deprive the roots of oxygen. Monitor the potting mix moisture carefully and water only when the top quarter is dry. Always water thoroughly until a bit runs through the drain holes. If your water is hard, use distilled or filtered water. Skip the fertilizer. Fertilizer is not medicine. It is intended only for healthy plants that are growing vigorously and using lots of nutrients.
Warm temps always help developing roots. Lots of bright indirect light is important. Most folks tend to over-estimate indoor light. Natural light filtered by frosted glass or sheers rarely yields sufficient light for plants to thrive. Likewise, light intensity drops of dramatically with every foot of distance from the light source. Corn Plants must be within a few feet of an uncovered north window.
