You should start rooting immediately. I have found my 'Leisha' to be one of the finicky Ti plants. Best color is noted in the spring with very little color the rest of the year.
Today...
Last spring...
I have had this plant for several years now, from the same seller you show on your plant tag. I have never thought it looked like the photos on the sellers site. The site claimed location, light levels and stress could effect the look. I grow it in early morning sun only.