skip to Main Content
Aeroponics Vs Hydroponics
How To Grow A Hydroponic Cactus


Many hydroponic growers have only grown fruits, herbs, and veggies. But what if you decided to grow a Cactus in your system?

In this guide, I am going to take you through Cactus Facts, what they grow well with, how to grow them in hydroponics & aeroponics, pruning, pest control, and the best seeds to grow!

Let’s get started!


Cactus Facts

  • Optimal PH: 5.5 – 6.5
  • Any number under 150PPM
  • Temp: 45 – 85 degrees
  • Enjoys: Light, soft water, warm spots – not too cold and not too hot

Grows well with

  • Sage
  • Rosemary
  • Thyme
  • Oregano
  • Curry
  • Lavender
  • Chives

Hydroponic Cactus

Just like other plants, Cactuses require water and nutrients taken in through the roots. Normally, these plants only grow in dry soil, but they can be grown in hydroponics. For this to work, the roots only need to be soaked in the water and nutrients. While growing a cactus in hydroponics, it requires a lot less effort than the other methods.

To begin, let’s get one thing out of the way. You can either start from seed, or you can propagate an existing cactus. Propagating a plant just means to create a new plant from an existing plant. To do this with a cactus, you need to cut a healthy piece off the plant, with the stem attached. Lay this out to dry for a few days, then place it in water and it will begin to grow roots and re-grow to a new cactus! It’s a pretty cool process.

To grow a Hydroponic cactus, you will need to germinate the seed, this is just like any other hydroponic plant. Once you have a few stems, you can place it into your hydroponic system. The next part is key, when placing the stems into the water solution, you will need to make sure that only the cut ends are in the water partially. If any other part of the cactus is in water, it will rot.

Can You Grow Cactus & Succulents in Hydroponics?

Aeroponic Cactus

Yes, it is possible to grow a cactus in an aeroponic system. They key to doing this right, is to ensure that only the roots are getting wet. When placing the plant into the system, be sure that only the end part of the roots are in the system, not all of the roots. If the entire root system gets wet, you have the risk of the Cactus dying from too much water.

Indoor Cactus

Indoor Cactuses are a common house plant. Why? Simply because they are low maintenance. In an AeroGarden system indoors, it is even less maintenance. You can grow your Cactus in Water, Hydroponic system, Aeroponics and of course soil. Just make sure that the plant is getting the right amount of light that is required by placing it by a window, or somewhere in which it will have the appropriate amount of light to maintain a happy, healthy plant.

Small Cactus


Cactuses don’t really need to be pruned simply because they do not grow like a fruit or vegetable. Typically, you would prune the roots to enable healthier roots, like hair cut in a way. Pruning will be needed if you notice that some of the plant is dying, or slacking. Just prune those right off, and they will grow back healthier!

Pest Control

Indoor plants tend to not be accountable for pests, although they can still come and go. A few to keep an eye for is: Mealy Bugs, And Root Mealy Bugs, Spider Mites, and Fungus Gnats. You should not have to worry about any of these unless you have a door or a window open allowing the pests to come inside and attack your plant.


Diseases are very common with house plants, just because it has to do with water, light, air, bacteria, and nutrients. It may take a while before starting to realize your cactus plant has a disease. Check the roots every other month or so to keep an eye out for root rot.

Tips & Tricks

  • If you are starting from a cutting, allow the cutting to dry out for a few days, then place it into the system.
  • When adding nutrients, only add half of what the system usually needs.
  • You can purchase Cactus cuttings from any online store! I have listed some at the bottom of this page, check it out!
  • Use soft water when you water your Cactus, bottled water or filtered water will do the trick.

Inside Scoop

A lot of AeroGarden Growers do not believe that you can grow a cactus in hydroponics, but you can!

Cactus thrive in the Light from the AeroGarden!

Many growers love to place the cutting in Clay Pebbles, which seems to do the trick.

If you notice your plant is looking unhappy, you may have over watered it. Simply remove it from your system, and allow it to dry for a day or two, then place it back into your system.

A lot of Cactus lovers like to use water and even rocks instead of clay pebbles.

Try to avoid putting your Cactuses (that have been outdoors) that are in soil, near your AeroGarden. This is simply because you could attract bugs to your AeroGarden because of the soil in the plant.

Typically when in soil, Cactuses can’t tolerate a lot of water because it will cause root rot. But when you submerge them in water, they start to develop new roots that can now tolerate all the water. This is the plant’s way of adapting to new climates.

Cactus Seeds and Cuttings

The best thing to do when growing a Cactus is to get it from a local plant store, or ask a friend for a cutting of their Cactus!

Back To Top