Donna:
I live in Austin,Texas don't know where your at but
you should use some pine bark mulch to help with drainage
in heavy rain fall area's do move it into a larger pot too. Use 50% regular pine bark (Not the "decorative or nuggets"
type) 50% potting soil. If you were growing your plant in a controled environment just Miracle Grow would be fine.You will need to also fertize with Hasta Gro(6-12-6).Bring in
when a frost or colder is expected. It likes to be kept wet.
Keep an eye out for whitefly they can be a real problem too.
Great plant it flowers all through summer and into the fall.
Flowering begins later than it's cousin S."Indigo Spires"
they are both sterile so no seed just lots of blooms!!