4. Crowded Or Tangled Growth

If your Christmas cactus has become overwhelmingly dense and seeing the tangled mess causes you stress, it’s time to prune and thin it out.
Tangled stems and foliage limit air circulation throughout the plant and substantially raise the chances of attracting a fungal disease. Your Christmas cactus also won’t be able to absorb as much light due to the crowded foliage, likely resulting in weaker blooms.
3. Stunted Growth? That’s A Bad Sign!

Is your Christmas cactus growth very weak and slow? Some trimming might help.
Though it may seem counterintuitive to trim down a plant with weaker growth, pruning can actually promote rejuvenation and vigor, leading to healthier, long-term growth.
But, it’s very important to prune carefully and only remove stems or leaves that appear discolored or weak. Trimming down too much can stress your plant, limiting growth even further.
2. Unbalanced Shape

This is probably the easiest sign to recognize when it’s time to prune. You don’t need a trained eye or be an expert to notice an unbalanced plant shape.
If your Christmas cactus is moving farther away from the ideal shape you had in mind for it, pruning is necessary to bring it under control and give it a tidier, more presentable look.
In some cases, only certain areas of the plant may be producing uneven growth, causing the entire plant to look unbalanced. This is another clear sign that your cactus needs pruning.
1. Pest Or Disease Issues

If you’ve been experiencing pest and disease issues for some time now, you may need to prune your Christmas cactus if you’re serious about getting rid of them.
Thinning down your plant will make it harder for these little garden monsters to establish themselves and infest, indirectly driving them away from the plant.
How To Prune Your Christmas Cactus Safely?

Step 1: Prune Your at the Right Time
Generally, it’s a good idea to prune Christmas cactus around springtime or right after it completes a blooming cycle.
Step 2: Spot Dead or Weak Areas for Trimming
Carefully assess your plant and spot dead or weak areas that will need trimming.
Step 3: Make Precise Cuts
Using clean and sharp pruning shears, make cuts on the selected stems and leaves, ideally where the segments meet.
Step 4: Remove Stems and Leaves
Gently pull off the stems and leaves, making sure not to damage the healthy surrounding foliage.
Step 5: Monitor Your Plant
Closely monitor your plant for the next few days. After pruning, it will need lots of care and attention. Ensure proper hydration and that all other needs are being met.
Conclusion

These days, people on the internet tend to overcomplicate everything. In my view, and in the eyes of any wise gardener, pruning Christmas cactus is a simple task.
Yet, the online world makes it seem complex and confusing. Just watch for the signs that your plant needs pruning, and with a gentle touch, get the job done.