Can you put outside in summer? In zone 7
Yes, but keep it in a shady area and be sure to bring it in before frost. The cool temperatures in fall will induce buds.
I've had two Christmas cacti in an 18" pot for over 10 years (smaller pot previous to that). One of the cacti got root rot and I have pulled out the plant from the planter. The other one seems not to have been affected. I have a smaller Christmas cactus that I've been growing for 2 years and is in a 6 inch pot. Can I plant the smaller plant in with the older one in the large planter? (Actually, I already did; but then had second thoughts if this was a poor idea.) Your recommendations would be greatly appreciated. Photo attached. P.S. It does seem that photo uploaded.
My concern was using the same infected soil. If you didn't change the soil, I would do that and clean the pot well too (1 part bleach to 10 parts water) before refilling. It needs to be loose and well draining such as a cactus mix.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/repotting-christmas-cactus.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-root-rot.htm
I am getting ready to repot this Christmas Cactus. At one time it belonged to my grandma who has passed many years ago. I don't believe it has been repotted since she had it. I noticed it wasn't as vibrant this last blooming season and have decided to give it a try. I have back up cuttings just incase I am not successful repotting it. I have included pictures and was wondering if you have any advice before I attempt this. Thanks for any help you may be able to lend. I will add photos the last one is 3 yrs ago and how it looked then.
I would cut it back to make it more even. There are a couple of gangly stems that are longer than the others. When you repot, only go up one size. Christmas cactus actually prefer to be rootbound. Use soil for cactus and succulents. Here is how to repot:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/repotting-christmas-cactus.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-soil.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/woody-christmas-cactus.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-fertilizer.htm
What do you do with the left flower pods on the Christmas Cactus.
You can leave them to go to seed, or you can remove them at any time. Here is a collection of articles to help you with the care of the plant:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus
I was at your sight looking up a question on my Christmas Cactus which obviously in not in a garden. My Christmas Cactus is in my living room. I live in Wisconsin and my living room window faces south. My Cactus has been in the same spot since I bought it last fall. I bought it with many buds and some blossoms and it was beautiful. Many times this spring/summer, it produces buds - I have a couple right now - but they never bloom. Is this normal. I thought you had to "force" them to produce buds. Thank you for your time and information.
With the right conditions, they can bloom more than once a year. When Christmas cactus summers outside, the cool days of fall will initiate buds. Then the plant is brought inside before frost threatens. When kept indoors, the shorter days of fall and longer nights will initiate bloom. You can make sure your plant gets the longer, uninterrupted darkness by keeping it in a cool room where no lights will be turned on during the night.
I am repotting a Christmas cactus that had root rot. Do I need to fertilize the cactus soil that I purchased?
If the bag of cactus soil says it includes fertilizer, I would not add any more. If it doesn't contain fertilizer, I still would not add any at this time. Here are instructions for repotting and when to fertilize.
Should the Christmas cactus be covered for a few weeks before blooming?
You will need to make sure that the plant has more than 12 hours of pitch black darkness every day for several weeks to a few months, then return to a longer daylight cycle. This will initiate flowering. Along with this, temperature, humidity, and water levels will need to be altered, slightly, to mimic a dormancy season.
Here is an article that will help: