We purchased our lemon tree about a month ago and it was in full bloom. We kept it in the house for about three weeks until it got warm enought (75 +) outside in a container that is about 15- 20 gal. We used POTTING MIX to plant it in the container instead of potting SOIL. We also have a saucer under the planter to retain any excess water that drains after watering. Did I make a mistake in using potting mix instead of potting soil and should I not let excess water sit in the saucer? Is water soluable fertilizer best? I might add that we live in New Mexico, so we have very low humiditiy. Since putting the plant outdoors, all the blossoms have fallen off as well as some leaves.