My pencil cactus is in a 4-inch clay pot. It is roughly 3 ft tall with very little lateral growth. I have it staked but am concerned that increased growth will unbalance it. Should I prune it back to encouage side branching? My lavender bush is very woody but am unsure how to cut it back. Please help. Thanks.
Yes, you can always prune back the plant if desired to both control its growth and encourage branching. It does sound as if it may also need repotting. https://www.gardeningknowhow.com/ornamental/cacti-succulents/pencil-cactus/care-pencil-cactus.htm As for your lavender, the following article will help: https://www.gardeningknowhow.com/edible/herbs/lavender/pruning-lavender.htm
My large pencil cactus is "laying down" in its pot and cascading down the sides like a hanging basket. I have another one that is upright and growing normal. Is this not really a pencil cactus and maybe something else or what can I do to encourage it to stand upright?
Thank you!
You may well have a variety of rhipsalis, such as this: https://www.gardeningknowhow.com/ornamental/cacti-succulents/rhipsalis/rhipsalis-mistletoe-cactus.htm
I have a pencil cactus that is over 7ft tall but healthy. I can't get it to stand up straight. Can I cut it in half and cap it with something to prevent disease?
Easy peasy. Cut it wherever you want, don't worry about "capping." You can pat a bunch of dirt from the pot to keep the sap from making a mess. (Sounds weird I know, but I do it all the time with ficus trees.) Not only that, you can plant the cutting, or cut it up to make several cuttings, and you'll have new plants. This article has more information: https://www.gardeningknowhow.com/ornamental/cacti-succulents/pencil-cactus/care-pencil-cactus.htm
If I cut it back, will it survive the winter indoors? Or leave as is and wait to see what happens in the east window during this winter? It is mostly firm but the ends are not turgid. The main stem is still green.
You can bring it inside for the winter. Put it in as bright a window as you have. I wouldn't do any cutting back until you see how it's recovering; if the temperature wasn't any lower than 38F, the pencil should be fine. Just be sure to check the soil for moisture down toward the bottom of the pot before watering - the plant is going to use a lot less water indoors than outside.
My pencil plant is about 6 feet high. The only foliage is the top 12 inches with one bottom branch. The upper branches have small leaves that have died and only the leaves on bottom branch have survived. Will new leaves appear or is the plant dying?
The pencil cactus leaves are very small, and only last a short time. In other words, the plant isn't really supposed to have leaves at all, except for a short time in the spring, or whenever its growing period is. Here's more information: https://www.gardeningknowhow.com/ornamental/cacti-succulents/pencil-cactus/care-pencil-cactus.htm
I am being given a cutting of the stick cactus and I want to grow it indoors and place it on my sunny windowsill. I have read online that in nature, it can grow to tremendous heights. How can I keep it at a reasonable size (height) appropriate for my bedroom? I intend to plant the cutting in a 1-gallon size "Smart Pot" using a cactus succulent potting mix. Any advice that you can give me would be greatly appreciated.
Here is a link with care and growing information.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/pencil-cactus/care-pencil-cactus.htm
I just planted a small pencil cactus with roots from another plant. Why did it shrivel up and die? What kind of soil do you I put it in and how do I get a rooted small one to grow?
Here is a link that will help you.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/pencil-cactus/care-pencil-cactus.htm