Hi Probably best to bring in before first frost.They will tolerate some frost but no freeze. In this part of Florida they are evergreen or in this case everred lol.You can bring it indoors and keep as a houseplant.Give as much light as possible and on th dry side during winter.I'm sure it will enjoy being out during summer. But watch that frost. gary.

Teeka, I've got some planted in full sun in zone 9 for over a year,with no supplemental water (no sprinklers or hose) after the first week or two of water to help get it established. It looks great, and is lush & healthy looking. My neighbor in zone 10 has it in full sun no supplementatl water either and it looks kind of faded and weak. I've also got Kiwi in full to very, very light, diffuse shade (a couple of overhead queen palms)in zone 10, they're only been there for a few weeks, but so far so good. The color is spectacular and holding up well. I love 'em.

Eko, I just bought a Red Star that I plan on overwintering indoors..I'd imagine they are hardy (in warm areas) since I've recently seen 2 humongous Red Star Cordylines for sale..They had one in the nursery where I got mine. It was in a 24" pot and perfect..at least 4' tall and 5' wide. Leaves thickened, and the purple was very pronounced..Are you planning on keeping outside all winter again, or overwinter indoors? Toni

You may keep them unless they are spotted from mites or leaf spot diseases. If your Cordyline is growing at an indistinguishable rate it will take longer for the plant to suck all the nutrients out of the browned leaves before dropping them naturally. Probably by now ( 9 months after your post) you can trim them off if they are the lower older leaves. Just know if you change anything about their culture they might bounce back to a deep maroon/brown green if they are lower leaves. A shocked cordyline will neglect to nurish 2/3 of lower leaves turning them an unattractive color but possibly without dropping them. If they are papery like papyrus then they are long dead and removing them is fine. Heck removing lower cordy leaves is always fine I'd just add a bit of nutrient solution to the next water bath and give them brighter shade for a few days. Remember low humidity will brown leaf edges working its way into the center. None of this applies if they are new leaves. I hope to see an update on how the color is now. I'm suspicious that the first post is actually 'kiwi' or 'pete's rainbow". Let me know if I didn't make sense or miscommunicated. My miss Andrea needs a humidifier and to be cool but my red sister doesn't and likes warmth. Hope that helps. I'm z7a in Nashville and all my Cordylines are indoor specimens that enjoy co-potting with tropical epiphytic vines for humidity and awkward small talk.