Dreaming of a cactus indicates you’re feeling crowded, that someone (or something) is invading your space. You’re feeling the need to establish boundaries and protect your privacy.
The dream could also be telling you to adapt to existing circumstances if you cannot change them; just as the cactus has adapted itself to the hot, dry circumstances of its desert environment.... Tryskelion Dream Interpretation
Defense, brusqueness, distance, hate-love and, in general, contradictory emotions. This image often comes up in dreams when you are in a situation in which you fear you have been injured. It points to the need for new boundaries and distance. This need for boundaries is often an expression of your sensitivity. Are you often acting irritably toward the world around you.7 Or, are you feeling overwhelmed by the intensity of your emotions.7 Take your emotions seriously and look for an appropriate way to express them.... Little Giant Encyclopedia
Vision: Looking at a cactus: you are isolating too much from people around you; you have become very “prickly.” Getting punctured by a cactus: thoughtless actions on your part will cause you harm. Watering a cactus: you are much too nice to people who don’t deserve it—they are “false friends.” Looking at a small cactus on a windowsill: you are too stingy—with yourself and others.
Depth Psychology: The cactus stands for the injuries that others have inflicted on you or for disappointments caused by false friends. It might also be symbolic of your own “prickliness.” See Porcupine.... Dreamers Dictionary
To dream of a cactus is an indication that you feel your personal space is being invaded. You feel unable to breathe and are seeking space and privacy.
The spines of the cactus are the physical representation of this wish. In many cases, you may feel you are in a situation you cannot get out of. Conversely, the cactus may indicate a personal desire to learn to protect yourself.
To dream of a cactus may also be a subconscious reminder that you need to learn to grow as your life changes.... Dream Symbols and Analysis
Dreaming of a cactus is usually the indication that you are feeling crowded, or that someone is invading your space, and since the cactus has the prickly spines for defense this represents to the dreamer a wish to establish a boundary and protect your privacy.
A cactus also represents winning out over adversity as it is found in the desert and has adapted itself to hot, dry, growing conditions, thus the dream could be telling the dreamer to adapt to the existing circumstances if he/she cannot change them.... Encyclopedia of Dreams
Dreams of a cactus symbolize your egoic exterior that keeps people and opportunities at bay. Your subconscious mind is giving you the message that when your spiky edges are revealed, you have an opportunity for a breakthrough in intimacy. Intimacy and love are meant to bring up everything unlike itself.
The cactus can also represent good karma and your ability to survive extreme circumstances. See Boundary and Desert.... Strangest Dream Explanations