This could either be a cultivar that just has lighter leaves, or your potting mix is not correct. You need a well draining mix but it needs plenty of organic matter. When you buy one, remove about half of the shipping mix, as it's mostly peat. Score the roots a bit with a knife and mix in a good organic soil like Dr Earth's "Pot of Gold". Don't forget bi-weekly fertilizer. Keep a five-gallon bucket outside with some netting over it to allow it to "age" but keep bugs and debris out. Use it to water the houseplants with.