We are attempting the same thing. I started back on October 26th. Our plant doesn't have as many red leaves as when we got it, but the leaves on the end of each branch are red.
@tinley23 They need around 14 hours of darkness for the colour to return to red, so I put a black sack over mine at around 5.00pm and leave it until the next morning, seems to be working so far!
@gijsje I just googled it and found they need 14 hours of darkness, so I put a black bag over it every evening and leave until the next day. So far so good!
Thanks, Anne.