Start the seeds indoors in early March. Use a sterile soilless potting or seed starter mix. Keep the soil slightly moist and about 55 degrees. Once the seeds sprout place the young seedlings under grow lights or in a bright sunny window.
Try to provide as much as light as possible. Indoors a South facing window would be the first choice.
Water your Yucca liberally during warmer months of the year. Like all plants it's impossible to give rigid watering intervals, but if conditions are exceptional (bright, warm etc) you could be looking to do this as frequently as once a week or more. The soil should dry out a little between waterings. In Winter a lot less water is required.
Where to plant + Ideal climate
Plants may be grown in the ground in landscapes in the U.S. only in Zones 9 and above. But if you choose to plant it indoors, you can do it anywhere.
Your Yucca will tolerate a wide range of temperatures, but average home temperatures are best. Cooler in Winter if possible, but not lower than 7°C (45°F).
When to plant
You can plant Yucca elephantipes in spring or fall.
In addition to the aesthetic appeal, the Yucca Elephantipes will bring a range of health benefits. For starters, its broad leaves will help with air purification. Through the process of metabolic breakdown, this plant will eliminate various chemical compounds from the air. This means fewer ailments especially those related to the respiratory system. In addition to that, the plant will help with humidity control. This is essential in the elimination of dust from the air and preventing such problems as coughs, colds, sore throats and fatigue.